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Which animal's mouth is also adapted for bottom feeding? | [
"discus",
"armored catfish",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Sturgeons eat invertebrates, plants, and small fish. They are bottom feeders. Bottom feeders find their food at the bottom of rivers, lakes, and the ocean.
The 's mouth is located on the underside of its head and points downward. Its mouth is adapted for bottom feeding.
Figure: sturgeon. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's mouth is one example of an adaptation. Animals' mouths can be adapted in different ways. For example, a large mouth with sharp teeth might help an animal tear ... | Look at the picture of the sturgeon.
The sturgeon's mouth is located on the underside of its head and points downward. Its mouth is adapted for bottom feeding. The sturgeon uses its mouth to find food hidden in the sediment at the bottom of rivers, lakes, and the ocean.
Now look at each animal. Figure out which animal ... | B | 0 | |
Which of the following could Wendy's test show? | [
"whether producing more insulin would help the bacteria grow faster",
"whether different types of bacteria would need different nutrients to produce insulin",
"whether she added enough nutrients to help the bacteria produce 20% more insulin",
"None of the above",
"I don't know"
] | 2 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade7 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | C | 1 | ||
Does this passage describe the weather or the climate? | [
"weather",
"climate",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Figure: Chicago.
Chicago is known as The Windy City. But on average, the wind there only blows at about 10 miles per hour.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade4 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Chicago is known as The Windy City. But on average, the wind there only blows at about 10 miles per hour.
The underlined part of the passage tells you about the usual wind patterns in Chicago. This passage does not describe what the weather is like on a particular day. So, this passage descr... | B | 2 | |
Which animal's feet are also adapted for grabbing prey? | [
"sable",
"New Zealand falcon",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Bald eagles eat fish, mammals, and other birds. The 's feet are adapted for grabbing prey.
Figure: bald eagle. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's feet is one example of an adaptation. Animals' feet can be adapted in different ways. For example, webbed feet might help an animal swim. Feet with thick fur m... | Look at the picture of the bald eagle.
The bald eagle has long toes with sharp claws. Its feet are adapted for grabbing prey. The sharp claws can help the bald eagle attack and kill its prey. The long toes can help it hold on to its prey.
Now look at each animal. Figure out which animal has a similar adaptation.
The Ne... | B | 3 | |
Is the following statement about our solar system true or false?
Jupiter's volume is more than 10,000 times as large as the volume of Mars. | [
"true",
"false",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To determine if this statement is true, calculate the value of 10,000 times the volume of Mars.
Then compare the result to the volume of Jupiter. Jupiter's volume is 1.43 x 10^15 km^3, which is less than 1.63 x 10^15 km^3. So, Jupiter's volume is less than 10,000 times as large as the volume of Mars. | B | 4 | |
What is the capital of Massachusetts? | [
"Plymouth",
"Albany",
"Wichita",
"Boston",
"I don't know"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Boston is the capital of Massachusetts. | D | 5 | |||
Is Lithops bromfieldii made up of many cells? | [
"yes",
"no",
"All of the above",
"None of the above",
"I don't know"
] | 0 | This organism is Lithops bromfieldii. It is a member of the plant kingdom.
Lithops bromfieldii lives in South Africa. Each L. bromfieldii is made up of two brown or gray leaves. Because of its unusual appearance, L. bromfieldii is sometimes called a living stone. | yes or no | grade5 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Lithops bromfieldii is a plant. Plants are made up of many cells. | A | 6 | |
Which bird's beak is also adapted to tear through meat? | [
"sand martin",
"Cape vulture",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Red-tailed hawks eat fish, mammals, and other birds. The shape of the 's beak is adapted to tear through meat.
Figure: red-tailed hawk. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the red-tailed hawk.
The red-tailed hawk has a sharp hooked beak. Its beak is adapted to tear through meat. The sharp hook can help the red-tailed hawk cut the meat into pieces it can swallow.
Now look at each bird. Figure out which bird has a similar adaptation.
The Cape vulture has a sharp hook... | B | 7 | |
Which of these states is farthest north? | [
"Alabama",
"Idaho",
"South Carolina",
"Oklahoma",
"I don't know"
] | 1 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Idaho is farthest north. | B | 8 | ||
Which property do these three objects have in common? | [
"bouncy",
"hard",
"soft",
"None of the above",
"I don't know"
] | 2 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A hard object does not change shape when pressed or squeezed. None of the objects are hard.
A bouncy object will bounce back from the floor if you drop it. None of the objects are bouncy.
A soft object changes shape when pressed or squeezed. All thre... | C | 9 | |
Identify the question that Tyrone and Quincy's experiment can best answer. | [
"Do ping pong balls stop rolling along the ground sooner after being launched from a 30° angle or a 45° angle?",
"Do ping pong balls travel farther when launched from a 30° angle compared to a 45° angle?",
"All of the above",
"None of the above",
"I don't know"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Tyrone placed a ping pong ball in a catapult, pulled the catapult's arm back to a 45° angle, and launched the ball. Then, Tyrone launched another ping pong ball, this time pulling the catapult's arm back to a 30° angle.... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | B | 10 | ||
Which animal's mouth is also adapted for bottom feeding? | [
"clown triggerfish",
"sturgeon",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Armored catfish eat plants and small invertebrates. They are bottom feeders. Bottom feeders find their food at the bottom of rivers, lakes, and the ocean.
The catfish's mouth is located on the underside of its head and points downward. Its mouth is adapted for bottom feeding.
Figure: armored catfish. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's mouth is one example of an adaptation. Animals' mouths can be adapted in different ways. For example, a large mouth with sharp teeth might help an animal tear ... | Look at the picture of the armored catfish.
The armored catfish's mouth is located on the underside of its head and points downward. Its mouth is adapted for bottom feeding. The armored catfish uses its mouth to find food hidden in the sediment at the bottom of rivers and streams.
Now look at each animal. Figure out wh... | B | 11 | |
Which property do these two objects have in common? | [
"salty",
"sour",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A lemon has a sour taste. Both objects are sour.
Potato chips have a salty taste. The lime is not salty.
The property that both objects have in common is sour. | B | 12 | |
Based on the arrows, which of the following organisms is a consumer? | [
"barren-ground caribou",
"bear sedge",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade4 | natural science | biology | Ecosystems | Interpret food webs | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Consumers eat other organisms. So, there are arrows in a food web that point from other organisms to consumers.
The barren-ground caribou has an arrow pointing to it from the lichen. So, the barren-ground caribou is a consumer.
The bear sedge does not have any arrows pointing to it. So, the bear sedge is a producer, no... | A | 13 | |
What is the expected ratio of offspring with black eyes to offspring with red eyes? Choose the most likely ratio. | [
"1:3",
"2:2",
"4:0",
"3:1",
"0:4"
] | 2 | In a group of koi fish, some individuals have red eyes and others have black eyes. In this group, the gene for the eye color trait has two alleles. The allele for red eyes (E) is dominant over the allele for black eyes (e).
This Punnett square shows a cross between two koi fish. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring with black eyes or red eyes, consider whether each phenotype is the dominant or recessive allele's version of the eye color trait. The question tells you that the E allele, which is for red eyes, is dominant over the e allele, which is for black eyes... | C | 14 | |
Identify the question that Reba and Donald's experiment can best answer. | [
"Does Reba's snowboard slide down a hill in less time when it has a layer of wax or when it does not have a layer of wax?",
"Does Reba's snowboard slide down a hill in less time when it has a thin layer of wax or a thick layer of wax?",
"All of the above",
"None of the above",
"I don't know"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Reba applied a thin layer of wax to the underside of her snowboard and rode the board straight down a hill. Then, she removed the wax and rode the snowboard straight down the hill again. She repeated the rides four more... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | A | 15 | ||
Which term matches the picture? | [
"appendicular skeleton",
"axial skeleton",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Read the text.
You may think of the human skeleton as one big collection of bones (206 to be exact), but it actually consists of two parts: the axial skeleton and the appendicular skeleton. The axial skeleton is made up of the bones and cartilage of the head and torso, including the skull, vertebral column, and rib cag... | closed choice | grade8 | language science | word-study | Domain-specific vocabulary | Determine the meaning of domain-specific words with pictures | The axial skeleton is the part the human skeleton that makes up the head and torso. It includes the skull, vertebral column, and rib cage. | B | 16 | ||
Does this passage describe the weather or the climate? | [
"climate",
"weather",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Figure: Malaysia.
Malaysia is located in Southeast Asia. The arrival of a storm brought dark clouds on the first day of June.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Malaysia is located in Southeast Asia. The arrival of a storm brought dark clouds on the first day of June.
The underlined part of the passage tells you about the clouds seen in Malaysia on June 1. This passage describes the atmosphere at a certain place and time. So, this passage describes ... | B | 17 | |
Does this passage describe the weather or the climate? | [
"climate",
"weather",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Figure: Lhasa.
Lhasa is a city in the high mountains of Tibet. The winds there were blowing at 30 miles per hour this morning.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade4 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Lhasa is a city in the high mountains of Tibet. The winds there were blowing at 30 miles per hour this morning.
The underlined part of the passage tells you about the wind speed in Lhasa this morning. This passage describes the atmosphere at a certain place and time. So, this passage describ... | B | 18 | |
Is the following statement about our solar system true or false?
The volume of Mars is more than three times as large as Mercury's. | [
"false",
"true",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | To determine if this statement is true, calculate the value of three times the volume of Mercury.
Then compare the result to the volume of Mars. The volume of Mars is 160 billion km^3, which is less than 180 billion km^3. So, the volume of Mars is less than three times as large as Mercury's. | A | 19 | |
Select the bird below. | [
"gray tree frog",
"pelican",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Birds have feathers, two wings, and a beak. A woodpecker is an example of a bird. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A pelican is a bird. It has feathers, two wings, and a beak.
A gray tree frog is an amphibian. It has moist skin and begins its life in water. | B | 20 | |
Which bird's beak is also adapted to crack large, hard nuts? | [
"blue rock pigeon",
"Alexandrine parakeet",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Scarlet macaws live in the forests of Central and South America. They eat large seeds and nuts. The shape of the 's beak is adapted to crack open large, hard nuts.
Figure: scarlet macaw. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the scarlet macaw.
The scarlet macaw has a thick hooked beak. Its beak is adapted to crack large, hard nuts. The scarlet macaw uses its thick beak to crack the shell of a nut by squeezing it. The hooked shape of the beak can help the bird hold the nut in place while cracking it.
Now look at each ... | B | 21 | |
Complete the sentence.
is what happens when pollen lands on a female cone. | [
"Fertilization",
"Pollination",
"Photosynthesis",
"None of the above",
"I don't know"
] | 1 | Male cones make pollen. Wind can blow pollen from a male cone to a female cone. | closed choice | grade4 | natural science | biology | Plants | Describe and construct conifer life cycles | Conifers are plants that grow cones. Conifers use their cones to reproduce, or make new plants like themselves. How do conifers use their cones to reproduce?
Conifers can grow male and female cones. Male cones make pollen, and female cones make eggs. Pollination is what happens when wind blows pollen from male cones on... | When pollen lands on a female cone, it is called pollination. This photograph shows wind blowing pollen from the male cones on a Japanese cedar tree.
Photosynthesis happens when plants use water, carbon dioxide, and energy from sunlight to make sugar. | B | 22 | |
Which property do these three objects have in common? | [
"stretchy",
"transparent",
"rough",
"None of the above",
"I don't know"
] | 0 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
You can see clearly through a transparent object. None of the objects are transparent.
A stretchy object gets longer when you pull on it. All three objects are stretchy.
A rough object feels scratchy when you touch it. The bubble gum and the rubber b... | A | 23 | |
Which term matches the picture? | [
"chemical change",
"physical change",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Read the text.
When a substance goes through a physical change, its form or shape changes, but its chemical composition does not. For example, when water freezes and becomes a solid, its form changes, but it is still made up of the same molecules. In a chemical change, by contrast, one or more of the molecules in a sub... | closed choice | grade6 | language science | vocabulary | Context clues | Determine the meaning of domain-specific words with pictures | When water melts, it goes through a physical change. The substance changes from a solid to a liquid. | B | 24 | ||
Is Chelonoidis nigra made up of many cells? | [
"no",
"yes",
"All of the above",
"None of the above",
"I don't know"
] | 1 | This organism is Chelonoidis nigra. It is a member of the animal kingdom.
Chelonoidis nigra is commonly called a Galápagos giant tortoise. These large tortoises live on the Galápagos Islands. When Spanish sailors arrived at these islands in the 1530s, about 200,000 Galápagos giant tortoises lived on the islands. The Sp... | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Chelonoidis nigra is an animal. Animals are made up of many cells. | B | 25 | |
Which of these continents does the equator intersect? | [
"North America",
"Australia",
"Africa",
"None of the above",
"I don't know"
] | 2 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The equator is the line at 0° latitude. It intersects Africa. It does not intersect North America or Australia. | C | 26 | ||
What is the name of the colony shown? | [
"New Hampshire",
"Iowa",
"Massachusetts",
"Vermont",
"I don't know"
] | 0 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New Hampshire.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | A | 27 | |||
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B",
"None of the above",
"I don't know"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample A have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average kinetic energy, sampl... | A | 28 | |
Does this passage describe the weather or the climate? | [
"weather",
"climate",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Figure: Oklahoma.
Large thunderstorms, called supercells, often bring large clouds. Oklahoma often experiences violent storms during the summer months.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Large thunderstorms, called supercells, often bring large clouds. Oklahoma often experiences violent storms during the summer months.
The underlined part of the passage tells you about the usual pattern of cloud cover in Oklahoma. This passage does not describe what the weather is like on a ... | B | 29 | |
Identify the question that Rob's experiment can best answer. | [
"Do steel nails rust in fewer days when submerged in a large volume of liquid compared to a small volume?",
"Do steel nails take fewer days to rust in water compared to vinegar?",
"All of the above",
"None of the above",
"I don't know"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Rob put one two-inch steel nail into each of six test tubes. He added water to three of the test tubes and vinegar to the other three. In each test tube, he completely covered the nail with the same volume of liquid. Ro... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | B | 30 | ||
Based on the bubble map, what does the quotation "Vanity, not love, has been my folly" show? | [
"Darcy is stubborn.",
"Elizabeth is judgmental.",
"All of the above",
"None of the above",
"I don't know"
] | 1 | This bubble map shows traits of characters from Pride and Prejudice by Jane Austen. It also includes quotations from the characters that show these traits. | closed choice | grade6 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | A bubble map uses lines or arrows to connect things that are related. This bubble map shows traits of characters from Pride and Prejudice by Jane Austen. It also includes quotations from the characters that show these traits.
Find the quotation "Vanity, not love, has been my folly" in the bubble map. It is directly con... | B | 31 | |
Which of these oceans does the prime meridian intersect? | [
"the Indian Ocean",
"the Arctic Ocean",
"the Pacific Ocean",
"None of the above",
"I don't know"
] | 1 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects the Arctic Ocean. It does not intersect the Indian Ocean or the Pacific Ocean. | B | 32 | ||
What can Rebecca and Damon trade to each get what they want? | [
"Damon can trade his almonds for Rebecca's tomatoes.",
"Rebecca can trade her tomatoes for Damon's broccoli.",
"Rebecca can trade her tomatoes for Damon's carrots.",
"Damon can trade his broccoli for Rebecca's oranges.",
"I don't know"
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Rebecca and Damon open their lunch boxes in the school cafeteria. Neither Rebecca nor Damon got everything that they wanted. The ... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Rebecca wants broccoli. Damon wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | B | 33 | ||
What is the capital of North Carolina? | [
"Raleigh",
"Charlotte",
"Cincinnati",
"Nampa",
"I don't know"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Raleigh is the capital of North Carolina. | A | 34 | |||
Which animal's body is better adapted for protection against a predator with sharp teeth? | [
"queen conch",
"collared dove",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Nautiluses live in the ocean. They have a hard outer shell.
The is adapted to protect itself from predators with sharp teeth. It can pull the soft parts of its body into its shell when attacked.
Figure: nautilus. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the nautilus.
The nautilus has a hard outer shell. Its body is adapted for protection against a predator with sharp teeth. The hard shell makes it difficult for predators to hurt or kill the nautilus.
Now look at each animal. Figure out which animal has a similar adaptation.
The queen conch has a... | A | 35 | |
What is the capital of Wyoming? | [
"Salem",
"Anchorage",
"Laramie",
"Cheyenne",
"I don't know"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | D | 36 | |||
What is the direction of this push? | [
"toward his finger",
"away from his finger",
"All of the above",
"None of the above",
"I don't know"
] | 1 | A child presses a button in an elevator. He uses a force to push the button with his finger. | closed choice | grade4 | natural science | physics | Force and motion | Identify directions of forces | A force is a push or a pull that one object applies to another. Every force has a direction.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The child pushes the button. The direction of the push is away from his finger. | B | 37 | |
Which statement describes the Gobi Desert ecosystem? | [
"It has warm summers and mild winters.",
"It has a small amount of rain or snow.",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Figure: Gobi Desert.
The Gobi Desert is a cold desert ecosystem located in northern China and southern Mongolia. This desert is next to the Himalayan Mountains and used to be part of the Mongol Empire. | closed choice | grade8 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A cold desert is a type of ecosystem. Cold deserts have the following features: a small amount of rain or snow, dry, thin soil, and long, cold winters. So, the following statements describe the Gobi Desert ecosystem: a small amount of rain or snow, dry, thin soil, and long, cold winters. It has a small amount of rain o... | B | 38 | |
What is the capital of Wisconsin? | [
"Jefferson City",
"Milwaukee",
"Nashville",
"Madison",
"I don't know"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Madison is the capital of Wisconsin. | D | 39 | |||
Which of the following could Kenneth's test show? | [
"how steady a parachute with a 1 m vent was at 200 km per hour",
"whether a parachute with a 1 m vent would swing too much at 400 km per hour",
"if the spacecraft was damaged when using a parachute with a 1 m vent going 200 km per hour",
"None of the above",
"I don't know"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade8 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | A | 40 | ||
What is the expected ratio of offspring with fuzzy leaves to offspring with smooth leaves? Choose the most likely ratio. | [
"0:4",
"1:3",
"4:0",
"3:1",
"2:2"
] | 4 | In a group of summer squash plants, some individuals have fuzzy leaves and others have smooth leaves. In this group, the gene for the leaf texture trait has two alleles. The allele for fuzzy leaves (L) is dominant over the allele for smooth leaves (l).
This Punnett square shows a cross between two summer squash plants. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring with fuzzy leaves or smooth leaves, consider whether each phenotype is the dominant or recessive allele's version of the leaf texture trait. The question tells you that the L allele, which is for fuzzy leaves, is dominant over the l allele, which is ... | E | 41 | |
Which of the following could Emilio's test show? | [
"if at least 20% of the park would be shaded by trees in each design",
"which design would have the least traffic noise in the concert area",
"which design would have the greatest distance between the concert area and the road",
"None of the above",
"I don't know"
] | 2 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade7 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | C | 42 | ||
Identify the question that Tim's experiment can best answer. | [
"Can pennies hold more drops of water mixed with dish soap or water mixed with hand soap?",
"Can pennies hold more drops of pure water or water mixed with hand soap?",
"All of the above",
"None of the above",
"I don't know"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Tim used a dropper to put equal-sized drops of pure water, one at a time, onto a penny. The drops stayed together and formed a dome on the penny's surface. Tim recorded the number of drops he could add before the water ... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | B | 43 | ||
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is stronger in Pair 1.",
"The magnetic force is stronger in Pair 2.",
"The strength of the magnetic force is the same in both pairs.",
"None of the above",
"I don't know"
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger.
The magnets in Pair 1 are closer together than the magnets in Pair 2. So, the magnetic force is stronger in Pair 1 than in Pair 2. | A | 44 | |
Which of these states is farthest west? | [
"Nebraska",
"Mississippi",
"Florida",
"West Virginia",
"I don't know"
] | 0 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Nebraska is farthest west. | A | 45 | ||
What is the capital of Colorado? | [
"Nashville",
"Laramie",
"Denver",
"Boulder",
"I don't know"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | C | 46 | |||
Which trait did Ichthyornis have? Select the trait you can observe in the drawing. | [
"fur",
"a short tail",
"All of the above",
"None of the above",
"I don't know"
] | 1 | This drawing shows the skeleton of an ancient animal called Ichthyornis. This drawing was made by looking at the animal's fossils. | closed choice | grade6 | natural science | earth-science | Fossils | Compare fossils to modern organisms | The way an organism looks or acts is called a trait. Scientists use fossils to learn more about the traits of ancient organisms.
Fossils can preserve the remains of body parts and activities. A fossil of a body part, such as a tail or a wing, can tell you what an organism looked like. A fossil of an organism's activiti... | B | 47 | ||
Is perfume a mineral? | [
"no",
"yes",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Perfume has the following properties:
not a pure substance
liquid
human-made
no fixed crystal structure | yes or no | grade5 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Perfume does not have all the properties of a mineral. So, perfume is not a mineral. | A | 48 | |
What is the probability that a rabbit produced by this cross will have black fur? | [
"4/4",
"1/4",
"3/4",
"0/4",
"2/4"
] | 0 | In a group of rabbits, some individuals have black fur and others have brown fur. In this group, the gene for the fur color trait has two alleles. The allele for brown fur (f) is recessive to the allele for black fur (F).
This Punnett square shows a cross between two rabbits. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | A | 49 | ||
Which of these states is farthest west? | [
"Indiana",
"Missouri",
"Mississippi",
"Colorado",
"I don't know"
] | 3 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Colorado is farthest west. | D | 50 | ||
During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each aquarium",
"each aquarium . . . the surroundings",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Two identical aquariums were next to an open window. One aquarium had a plastic cover on it, and the other was uncovered. This table shows how the temperature of each aquarium changed over 1.5hours. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each aquarium decreased, which means that the thermal energy of each aquarium decreased. So, thermal energy was transferred from each aquarium to the surroundings. | B | 51 | |
Which ocean is highlighted? | [
"the Atlantic Ocean",
"the Pacific Ocean",
"the Indian Ocean",
"the Southern Ocean",
"I don't know"
] | 1 | closed choice | grade6 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Pacific Ocean. | B | 52 | ||
Which better describes the Monongahela National Forest ecosystem? | [
"It has warm, dry summers. It also has many different types of trees.",
"It has warm, wet summers. It also has only a few types of trees.",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Figure: Monongahela National Forest.
The Monongahela National Forest is a temperate deciduous forest ecosystem in eastern West Virginia. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A temperate deciduous forest is a type of ecosystem. Temperate deciduous forests have the following features: warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees. So, the Monongahela National Forest has warm, wet summers. It also has only a few types of trees. | B | 53 | |
Select the reptile below. | [
"leaf-tailed gecko",
"Banggai cardinalfish",
"red-eyed tree frog",
"clownfish",
"I don't know"
] | 0 | Reptiles have scaly, waterproof skin. Most reptiles live on land.
Reptiles are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A box turtle is an example of a reptile. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | A leaf-tailed gecko is a reptile. It has scaly, waterproof skin.
Many geckos have special pads on their toes. The pads help them climb up plants and rocks.
A clownfish is a fish. It lives underwater. It has fins, not limbs.
Clownfish live with animals called anemones. In the image of the clownfish, you can see the brow... | A | 54 | |
Select the amphibian below. | [
"red-eyed tree frog",
"robin",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Amphibians have moist skin and begin their lives in water. A green frog is an example of an amphibian. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A robin is a bird. It has feathers, two wings, and a beak.
A red-eyed tree frog is an amphibian. It has moist skin and begins its life in water. | A | 55 | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"None of the above",
"I don't know"
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magnitude of the magnetic force between them is smaller.
There is a greater distance between the magnets in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is smaller in Pair 1 than in Pair 2. | B | 56 | |
Which continent is highlighted? | [
"Australia",
"South America",
"Antarctica",
"North America",
"I don't know"
] | 3 | closed choice | grade4 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is North America. | D | 57 | ||
What is the capital of Idaho? | [
"Salt Lake City",
"Topeka",
"Boise",
"Denver",
"I don't know"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Boise is the capital of Idaho. | C | 58 | |||
Is gneiss a mineral or a rock? | [
"mineral",
"rock",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Gneiss has the following properties:
not a pure substance
not made by organisms
found in nature
made of light and dark mineral grains
no fixed crystal structure
solid | closed choice | grade8 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | The properties of gneiss match the properties of a rock. So, gneiss is a rock. | B | 59 | |
Is the following statement about our solar system true or false?
75% of the planets are made mainly of rock. | [
"true",
"false",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Use the data to answer the question below. | true-or false | grade7 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that four out of the eight planets are made mainly of rock. So, one-half, or 50%, of the planets are made mainly of rock. | B | 60 | |
Which better describes the Kibale National Forest ecosystem? | [
"It has year-round rain. It also has many different types of organisms.",
"It has cold winters. It also has soil that is rich in nutrients.",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Figure: Kibale National Forest.
Kibale National Forest is a tropical rain forest ecosystem in Uganda, a country in eastern Africa. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A tropical rain forest is a type of ecosystem. Tropical rain forests have the following features: year-round rain and warm temperatures, soil that is poor in nutrients, and many different types of organisms. So, Kibale National Forest has year-round rain. It also has many different types of organisms. | A | 61 | |
Select the amphibian below. | [
"golden frog",
"bison",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Amphibians have moist skin and begin their lives in water. A red-eyed tree frog is an example of an amphibian. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A golden frog is an amphibian. It has moist skin and begins its life in water.
A bison is a mammal. It has fur and feeds its young milk. | A | 62 | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 2.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker in Pair 1.",
"None of the above",
"I don't know"
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 1 are farther apart than the magnets in Pair 2. So, the magnetic force is weaker in Pair 1 than in Pair 2. | C | 63 | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker in Pair 1.",
"The magnetic force is weaker in Pair 2.",
"None of the above",
"I don't know"
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other. | Distance affects the strength of the magnetic force. But the distance between the magnets in Pair 1 and in Pair 2 is the same.
So, the strength of the magnetic force is the same in both pairs. | A | 64 | |
What is the capital of Alaska? | [
"Tallahassee",
"Fairbanks",
"Anchorage",
"Juneau",
"I don't know"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | D | 65 | |||
What is the capital of Arizona? | [
"Juneau",
"Phoenix",
"Reno",
"Tucson",
"I don't know"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Phoenix is the capital of Arizona. | B | 66 | |||
What is the capital of Colorado? | [
"Boulder",
"Denver",
"Cheyenne",
"Boise",
"I don't know"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Denver is the capital of Colorado. | B | 67 | |||
Which property do these three objects have in common? | [
"bouncy",
"fuzzy",
"sweet",
"None of the above",
"I don't know"
] | 2 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
Sugar has a sweet taste. All three objects are sweet.
A fuzzy object is covered in soft hair. The chocolate bar and the candy sprinkles are not fuzzy.
A bouncy object will bounce back from the floor if you drop it. The chocolate bar is not bouncy.
Th... | C | 68 | |
Is malachite a mineral? | [
"yes",
"no",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Malachite has the following properties:
pure substance
solid
naturally occurring
fixed crystal structure
not made by living things | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Malachite has all the properties of a mineral. So, malachite is a mineral. | A | 69 | |
Is the following statement about our solar system true or false?
75% of the planets are made mainly of rock. | [
"false",
"true",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that four out of the eight planets are made mainly of rock. So, one-half, or 50%, of the planets are made mainly of rock. | A | 70 | |
Which property do these three objects have in common? | [
"opaque",
"stretchy",
"fragile",
"None of the above",
"I don't know"
] | 0 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A fragile object will break into pieces if you drop it. The steel beam and the towel are not fragile.
A stretchy object gets longer when you pull on it. The steel beam and the popcorn are not stretchy.
An opaque object does not let light through. All... | A | 71 | |
Does this passage describe the weather or the climate? | [
"climate",
"weather",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Figure: Uganda.
Uganda is an African country near the equator. It has large forests which are humid during April and May each year.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Uganda is an African country near the equator. It has large forests which are humid during April and May each year.
The underlined part of the passage tells you about the usual pattern of humidity in Uganda. This passage does not describe what the weather is like on a particular day. So, thi... | A | 72 | |
Which solution has a higher concentration of yellow particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same",
"None of the above",
"I don't know"
] | 1 | The diagram below is a model of two solutions. Each yellow ball represents one particle of solute. | closed choice | grade8 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... | B | 73 | |
Which of these states is farthest west? | [
"Georgia",
"Mississippi",
"Maine",
"Vermont",
"I don't know"
] | 1 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Mississippi is farthest west. | B | 74 | ||
Which solution has a higher concentration of yellow particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A",
"None of the above",
"I don't know"
] | 2 | The diagram below is a model of two solutions. Each yellow ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... | C | 75 | |
What is the capital of Oregon? | [
"Phoenix",
"Sacramento",
"Salem",
"Frankfort",
"I don't know"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. | C | 76 | |||
What is the capital of Oregon? | [
"Portland",
"Boston",
"Salem",
"Minneapolis",
"I don't know"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Salem is the capital of Oregon. | C | 77 | |||
Which of these states is farthest north? | [
"Oregon",
"Kansas",
"Mississippi",
"Illinois",
"I don't know"
] | 0 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Oregon is farthest north. | A | 78 | ||
Which better describes the Kaeng Krachan National Park ecosystem? | [
"It has year-round warm temperatures. It also has many different types of organisms.",
"It has cold winters. It also has many different types of organisms.",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Figure: Kaeng Krachan National Park.
Kaeng Krachan National Park is a tropical rain forest ecosystem in western Thailand. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A tropical rain forest is a type of ecosystem. Tropical rain forests have the following features: year-round rain and warm temperatures, soil that is poor in nutrients, and many different types of organisms. So, Kaeng Krachan National Park has year-round warm temperatures. It also has many different types of organisms. | A | 79 | |
Which animal's feet are also adapted for swimming? | [
"purple gallinule",
"lava gull",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Black-bellied whistling ducks live near lakes and streams in North America. They find most of their food in shallow water. The feet of the are adapted for swimming.
Figure: black-bellied whistling duck. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's feet is one example of an adaptation. Animals' feet can be adapted in different ways. For example, webbed feet might help an animal swim. Feet with thick fur m... | Look at the picture of the black-bellied whistling duck.
The black-bellied whistling duck has webbed feet. Its feet are adapted for swimming. As it swims, the black-bellied whistling duck uses its webbed feet to push itself through water.
Now look at each animal. Figure out which animal has a similar adaptation.
The la... | B | 80 | |
What evidence of a wildfire does this picture show? | [
"There is white ash on the ground.",
"Some of the trees have green leaves.",
"All of the above",
"None of the above",
"I don't know"
] | 0 | This picture was taken after a wildfire. A wildfire happens when a natural area catches fire and burns. | closed choice | grade2 | natural science | earth-science | Earth events | Find evidence of changes to Earth's surface | Evidence is information that tells you something happened.
How do you look for evidence of a change to Earth's surface?
There are many ways to find evidence of a change to Earth's surface. One way is to look at a picture that was taken after the change.
Here are some examples of what the evidence for different changes ... | A | 81 | ||
Is granodiorite a mineral? | [
"yes",
"no",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Granodiorite has the following properties:
not made by organisms
no fixed crystal structure
solid
not a pure substance
naturally occurring | yes or no | grade5 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Granodiorite does not have all the properties of a mineral. So, granodiorite is not a mineral. | B | 82 | |
Select the organism in the same species as the black-headed gull. | [
"Chroicocephalus ridibundus",
"Chroicocephalus serranus",
"Crocodylus moreletii",
"None of the above",
"I don't know"
] | 0 | This organism is a black-headed gull. Its scientific name is Chroicocephalus ridibundus. | closed choice | grade8 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A black-headed gull's scientific name is Chroicocephalus ridibundus.
Chroicocephalus ridibundus is in the same genus as Chroicocephalus serranus, but they are not in the same species.
Organisms in the same species have the same scientific names. Chroicocephalus ridibundus and Chroicocephalus serranus are different spec... | A | 83 | |
Identify the question that Cooper's experiment can best answer. | [
"Can pennies hold more drops of water mixed with dish soap or water mixed with hand soap?",
"Can pennies hold more drops of pure water or water mixed with hand soap?",
"All of the above",
"None of the above",
"I don't know"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Cooper used a dropper to put equal-sized drops of pure water, one at a time, onto a penny. The drops stayed together and formed a dome on the penny's surface. Cooper recorded the number of drops he could add before the ... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | B | 84 | ||
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample A",
"sample B",
"None of the above",
"I don't know"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in sample B has more mass than each particle in sample A. The particles in sample B also have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average ... | C | 85 | |
Does this passage describe the weather or the climate? | [
"weather",
"climate",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Figure: Prague.
The Charles Bridge spans the Vltava River in Prague. Winters are windy in Prague, with average wind speeds of 11 miles per hour in December, January, and February.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
The Charles Bridge spans the Vltava River in Prague. Winters are windy in Prague, with average wind speeds of 11 miles per hour in December, January, and February.
The underlined part of the passage tells you about the usual wind patterns in Prague. This passage does not describe what the we... | B | 86 | |
Select the organism in the same species as the marbled salamander. | [
"Taricha torosa",
"Taricha granulosa",
"Ambystoma opacum",
"None of the above",
"I don't know"
] | 2 | This organism is a marbled salamander. Its scientific name is Ambystoma opacum. | closed choice | grade7 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A marbled salamander's scientific name is Ambystoma opacum.
Taricha granulosa does not have the same scientific name as a marbled salamander. So, Ambystoma opacum and Taricha granulosa are not in the same species.
Ambystoma opacum has the same scientific name as a marbled salamander. So, these organisms are in the same... | C | 87 | |
Which animal's skin is better adapted as a warning sign to ward off predators? | [
"flamboyant cuttlefish",
"impala",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Opalescent nudibranchs have stinging cells in their brightly colored skin. The bright colors serve as a warning sign that the animal is toxic and dangerous. The 's skin is adapted to ward off predators.
Figure: opalescent nudibranch. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the opalescent nudibranch.
The opalescent nudibranch has stinging cells in its brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the opalescent nudibranch is toxic and dangerous.
Now look at each animal. Figure out which animal has a ... | A | 88 | |
During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each pizza",
"each pizza . . . the surroundings",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Celine was delivering two identical pizzas to a customer. While driving to the customer's house, Celine put one of the pizza boxes on top of the other one. This table shows how the temperature of each pizza changed over 15minutes. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each pizza decreased, which means that the thermal energy of each pizza decreased. So, thermal energy was transferred from each pizza to the surroundings. | B | 89 | |
Which property matches this object? | [
"scratchy",
"flexible",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Select the better answer. | closed choice | grade3 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. | Look at the object.
Think about each property.
A flexible object can be folded or bent without breaking easily. The tent is flexible.
A scratchy object is rough and itchy against your skin. The tent is not scratchy. | B | 90 | |
What is the name of the colony shown? | [
"New Hampshire",
"Connecticut",
"Vermont",
"Georgia",
"I don't know"
] | 0 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is New Hampshire.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | A | 91 | |||
Will these magnets attract or repel each other? | [
"repel",
"attract",
"All of the above",
"None of the above",
"I don't know"
] | 0 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. | A | 92 | |
Identify the question that Jen's experiment can best answer. | [
"Do radishes grown under bright light get bigger than radishes grown under dim light?",
"Do radish plants grown under bright light have more leaves than radish plants grown under dim light?",
"All of the above",
"None of the above",
"I don't know"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Jen planted 20 radish plants in a greenhouse, putting each plant in its own pot. She placed ten of the pots under bright light and the other ten pots under dim light. Jen watered all the plants twice a day. After two mo... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | A | 93 | ||
What location was involved in the triangular trade? | [
"China",
"Great Britain",
"All of the above",
"None of the above",
"I don't know"
] | 1 | By the 1700s, merchants in the Thirteen Colonies traded goods across the Atlantic Ocean in a pattern called triangular trade. Look at the map showing this trade. Then answer the question below. | closed choice | grade7 | social science | us-history | The American Revolution | Causes of the American Revolution: introduction to mercantilism and the Navigation Acts | Look at the map.
The arrows on the map show that goods moved to and from these locations:
China was not involved in the triangular trade. | B | 94 | ||
What is the name of the colony shown? | [
"Florida",
"Vermont",
"New Hampshire",
"Maryland",
"I don't know"
] | 2 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New Hampshire.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | C | 95 | |||
Is gypsum a mineral? | [
"no",
"yes",
"All of the above",
"None of the above",
"I don't know"
] | 1 | Gypsum has the following properties:
pure substance
fixed crystal structure
not made by organisms
solid
naturally occurring | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Gypsum has all the properties of a mineral. So, gypsum is a mineral. | B | 96 | |
Which of the following fossils is younger? Select the more likely answer. | [
"crocodile egg",
"feather",
"All of the above",
"None of the above",
"I don't know"
] | 0 | This diagram shows fossils in an undisturbed sedimentary rock sequence. | closed choice | grade7 | natural science | earth-science | Fossils | Compare ages of fossils in a rock sequence | A fossil is the preserved evidence of an ancient organism. Some fossils are formed from body parts such as bones or shells. Other fossils, such as footprints or burrows, are formed from traces of an organism's activities.
Fossils are typically found in sedimentary rocks. Sedimentary rocks usually form in layers. Over t... | Look again at the fossils in the rock sequence diagram.
Compare the positions of these fossils to determine which one is younger:
The crocodile egg fossil is in a shallower layer in the rock sequence than the feather fossil. So, the crocodile egg fossil is most likely younger than the feather fossil. | A | 97 | |
What is the probability that a cow produced by this cross will be homozygous dominant for the coat pattern gene? | [
"0/4",
"1/4",
"4/4",
"2/4",
"3/4"
] | 0 | In a group of cows, some individuals have solid coloring and others have white spots. In this group, the gene for the coat pattern trait has two alleles. The allele for white spots (a) is recessive to the allele for solid coloring (A).
This Punnett square shows a cross between two cows. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring genotypes: homozygous or heterozygous?
How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene.
An organism with two identical alleles for a gene is homozygous for that gene.
If both alleles are dominant, the organism is h... | A | 98 | ||
What is the capital of Wisconsin? | [
"Lincoln",
"Madison",
"Helena",
"Jefferson City",
"I don't know"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Madison is the capital of Wisconsin. | B | 99 |
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