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train/4100 | Which is the main persuasive appeal used in this ad? | [
"logos (reason)",
"pathos (emotion)",
"ethos (character)"
] | 0 | closed choice | grade7 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals:
Appeals to ethos, or character, show that the writer or speaker is trustworthy or is an authority on a subject. An ad that appeals to ethos might do one... | The ad appeals to logos, or reason. It uses a graph to display information that shows its brand outperforms other brands. | |
train/4101 | Which statement describes the Cape Breton Highlands National Park ecosystem? | [
"It has soil that is frozen year-round.",
"It has many evergreen trees."
] | 1 | Figure: Cape Breton Highlands National Park.
Cape Breton Highlands National Park is a taiga ecosystem in eastern Canada. It is mostly covered with taiga forests that are home to moose, bears, bald eagles, and other organisms. | closed choice | grade6 | 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 taiga is a type of ecosystem. Taigas have the following features: long, cold winters and short, cool summers, many evergreen trees, and soil that is poor in nutrients. So, the following statements describe the Cape Breton Highlands National Park ecosystem: long, cold winters and short, cool summers, many evergreen tr... |
train/4102 | 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 greater in Pair 1.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 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, but some of them are different sizes. | closed choice | grade6 | 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,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/4103 | Is the following statement about our solar system true or false?
Jupiter's volume is more than 1,000 times as great as Earth's volume. | [
"false",
"true"
] | 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. | To determine if this statement is true, calculate the value of 1,000 times the volume of Earth.
Then compare the result to the volume of Jupiter. Jupiter's volume is 1,431,280 billion km^3, which is more than 1,090,000 billion km^3. So, Jupiter's volume is more than 1,000 times as great as Earth's volume. |
train/4104 | What is the capital of New Mexico? | [
"Newport",
"Santa Fe",
"Albuquerque",
"Phoenix"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Santa Fe is the capital of New Mexico. | ||
train/4105 | Select the organism in the same genus as the mountain zebra. | [
"Equus zebra",
"Macropus giganteus",
"Camelus bactrianus"
] | 0 | This organism is a mountain zebra. Its scientific name is Equus zebra. | closed choice | grade5 | natural science | biology | 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 mountain zebra's scientific name is Equus zebra. The first word of its scientific name is Equus.
This organism and the mountain zebra are in the same genus and the same species! Both organisms have the same scientific name, Equus zebra.
Macropus giganteus is in the genus Macropus. The first word of its scientific nam... |
train/4106 | What is the capital of Oregon? | [
"Portland",
"Salem",
"Cheyenne",
"Arlington"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Salem is the capital of Oregon. | ||
train/4107 | Which material is this soccer jersey made of? | [
"polyester",
"rock"
] | 0 | closed choice | grade3 | natural science | physics | Materials | Identify materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials. | Look at the picture of the soccer jersey.
The soccer jersey is made of polyester.
Polyester is a strong and light synthetic fabric. Synthetic materials are created by people. Polyester can be woven into materials to make clothes or even seat belts! It can also be used as stuffing in pillows and furniture. | |
train/4108 | Which of the following could Stefan's test show? | [
"how steady a parachute with a 1 m vent was at 200 km per hour",
"if the spacecraft was damaged when using a parachute with a 1 m vent going 200 km per hour",
"whether a parachute with a 1 m vent would swing too much at 400 km per hour"
] | 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... | |
train/4109 | Look at the models of molecules below. Select the elementary substance. | [
"dichloromethane",
"ozone",
"chloroform"
] | 1 | closed choice | grade6 | natural science | chemistry | Atoms and molecules | Identify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | ||
train/4110 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/4111 | In this experiment, which were part of a control group? | [
"the bottles that were at room temperature",
"the bottles that were cooled down"
] | 0 | The passage below describes an experiment.
Gina has a bubble machine and wants to know how to make the bubbles last longer. She read that bubbles burst when the liquid that makes up the bubbles evaporates. Gina knew that when liquids are warmer, they evaporate faster. So, she wondered if she could make her bubbles las... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify control and experimental groups | Experiments have variables, or parts that change. You can design an experiment to investigate whether changing a variable between different groups has a specific outcome.
For example, imagine you want to find out whether adding fertilizer to soil affects the height of pea plants. You could investigate this question wit... | In this experiment, Gina investigated whether cooling bubble solution affects bubbles. The bottles that were at room temperature were not cooled down. So, they were part of a control group. |
train/4112 | Select the mammal below. | [
"catfish",
"gray wolf"
] | 1 | Mammals have hair or fur and feed their young milk. A red kangaroo is an example of a mammal. | 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 catfish is a fish. It lives underwater. It has fins, not limbs.
A gray wolf is a mammal. It has fur and feeds its young milk. |
train/4113 | What is the probability that a cat produced by this cross will be homozygous dominant for the fur length gene? | [
"0/4",
"4/4",
"3/4",
"1/4",
"2/4"
] | 1 | In a group of cats, some individuals have short fur and others have long fur. In this group, the gene for the fur length trait has two alleles. The allele for long fur (f) is recessive to the allele for short fur (F).
This Punnett square shows a cross between two cats. | 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... | |
train/4114 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | 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 north pole of one magnet is closest to the north pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. |
train/4115 | Which solution has a higher concentration of green particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each green 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 green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... |
train/4116 | What is the capital of Colorado? | [
"Carson City",
"Colorado Springs",
"Baltimore",
"Denver"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | ||
train/4117 | Which state is highlighted? | [
"Illinois",
"Wisconsin",
"South Dakota",
"Minnesota"
] | 1 | closed choice | grade5 | social science | geography | States | Identify states of the Midwest | This state is Wisconsin. | ||
train/4118 | What can Jayla and Shelley trade to each get what they want? | [
"Shelley can trade her broccoli for Jayla's oranges.",
"Jayla can trade her tomatoes for Shelley's sandwich.",
"Shelley can trade her almonds for Jayla's tomatoes.",
"Jayla can trade her tomatoes for Shelley's broccoli."
] | 3 | 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.
Jayla and Shelley open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Jayla wanted ... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Jayla wanted broccoli in her lunch and Shelley was hoping for tomatoes. Look at the labeled part of the images.
Jayla has tomatoes. Shelley has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want. | |
train/4119 | Which material is this statue made of? | [
"rock",
"cardboard"
] | 0 | closed choice | grade3 | natural science | physics | Materials | Identify materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials. | Look at the picture of the statue.
The statue is made of rock.
Stone and rock mean the same thing. You might hear people say "stone" instead of "rock" when they are talking about statues or countertops. | |
train/4120 | What is the capital of Kansas? | [
"Tallahassee",
"Topeka",
"Missoula",
"Indianapolis"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Topeka is the capital of Kansas. | ||
train/4121 | Which trait did Priscacara have? Select the trait you can observe on the fossil. | [
"a long fin along its back",
"a mostly silver body"
] | 0 | This picture shows a fossil of an ancient animal called Priscacara.
In some places, large numbers of Priscacara fossils have been found near each other. This suggests that Priscacara lived in groups. | closed choice | grade3 | 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... | |
train/4122 | Identify the question that Jason'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?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Jason 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. ... | 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... | |
train/4123 | What is the capital of South Dakota? | [
"Bismarck",
"Lansing",
"Sioux Falls",
"Pierre"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | ||
train/4124 | Select the amphibian below. | [
"woodpecker",
"tiger salamander",
"whale shark",
"ostrich"
] | 1 | Amphibians have moist skin and begin their lives in water.
Amphibians are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A green tree frog is an example of an amphibian. | 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 tiger salamander is an amphibian. It has moist skin and begins its life in water.
Tiger salamanders often live in underground burrows.
A whale shark is a fish. It lives underwater. It has fins, not limbs.
Whale sharks are the largest fish in the world! Adult whale sharks can weigh over 21 tons—as much as seven elepha... |
train/4125 | Select the amphibian below. | [
"barking tree frog",
"ostrich"
] | 0 | Amphibians have moist skin and begin their lives in water. A common toad 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. | An ostrich is a bird. It has feathers, two wings, and a beak.
A barking tree frog is an amphibian. It has moist skin and begins its life in water. |
train/4126 | Which of the following could Juan's test show? | [
"how steady a parachute with a 1 m vent was at 200 km per hour",
"if the spacecraft was damaged when using a parachute with a 1 m vent going 200 km per hour",
"whether a parachute with a 1 m vent would swing too much at 400 km per hour"
] | 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... | |
train/4127 | Select the organism in the same genus as the Eurasian beaver. | [
"Castor fiber",
"Ovis canadensis",
"Lontra canadensis"
] | 0 | This organism is a Eurasian beaver. Its scientific name is Castor fiber. | closed choice | grade6 | 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 Eurasian beaver's scientific name is Castor fiber. The first word of its scientific name is Castor.
Ovis canadensis is in the genus Ovis. The first word of its scientific name is Ovis. So, Ovis canadensis and Castor fiber are not in the same genus.
Lontra canadensis is in the genus Lontra. The first word of its scien... |
train/4128 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Chesapeake Bay.
Unionville is a small town near Chesapeake Bay in Maryland. Rain is common there during June, July, and August.
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.
Unionville is a small town near Chesapeake Bay in Maryland. Rain is common there during June, July, and August.
The underlined part of the passage tells you about the usual pattern of precipitation in Unionville. This passage does not describe what the weather is like on a particular day. So... |
train/4129 | Which of the following could Maura'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"
] | 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 | 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... | |
train/4130 | Which country is highlighted? | [
"The Bahamas",
"Haiti",
"Cuba",
"Dominica"
] | 1 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Haiti.
Does Haiti have any territorial disputes?
Haiti claims to own Navassa Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
Navassa Island is also claimed by the United States. The United States claimed the island in 18... | ||
train/4131 | Select the organism in the same species as the bobcat. | [
"Felis silvestris",
"Felis margarita",
"Lynx rufus"
] | 2 | This organism is a bobcat. Its scientific name is Lynx rufus. | closed choice | grade4 | natural science | biology | 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 bobcat's scientific name is Lynx rufus.
Felis margarita does not have the same scientific name as a bobcat. So, Lynx rufus and Felis margarita are not in the same species.
Lynx rufus has the same scientific name as a bobcat. So, these organisms are in the same species.
Felis silvestris does not have the same scientif... |
train/4132 | Which of the following could Anita's test show? | [
"if the blade guards would break in a crash",
"how much the drone weighed with the blade guards",
"if adding the blade guards made the drone fly poorly"
] | 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 | 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... | |
train/4133 | Which of these states is farthest west? | [
"New Mexico",
"Vermont",
"Tennessee",
"Florida"
] | 0 | closed choice | grade4 | 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 west arrow is pointing. New Mexico is farthest west. | |
train/4134 | What can Belle and Martha trade to each get what they want? | [
"Martha can trade her broccoli for Belle's oranges.",
"Belle can trade her tomatoes for Martha's broccoli.",
"Martha can trade her almonds for Belle's tomatoes.",
"Belle can trade her tomatoes for Martha's carrots."
] | 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.
Belle and Martha open their lunch boxes in the school cafeteria. Neither Belle nor Martha got everything that they wanted. The ta... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Belle wants broccoli. Martha 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. | |
train/4135 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 1 | Figure: Umbria.
On summer afternoons, the sky in the Umbria region of Italy is often filled with large white clouds.
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.
On summer afternoons, the sky in the Umbria region of Italy is often filled with large white clouds.
This passage tells you about the usual pattern of cloud cover in Umbria. This passage does not describe what the weather is like on a particular day. So, this passage describes the climate. |
train/4136 | Select the fish below. | [
"catfish",
"fruit bat"
] | 0 | Fish live underwater. They have fins, not limbs. A salmon is an example of a fish. | closed choice | grade3 | 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 catfish is a fish. It lives underwater. It has fins, not limbs.
Unlike most other fish, catfish do not have scales! They have slimy skin.
A fruit bat is a mammal. It has hair and feeds its young milk.
Fruit bats eat fruit and drink nectar from flowers. They have special teeth to help them bite through fruit skins. |
train/4137 | Which is this organism's scientific name? | [
"Giraffa camelopardalis",
"giraffe"
] | 0 | This organism is Giraffa camelopardalis. It is also called a giraffe. | closed choice | grade8 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Giraffa camelopardalis is written in italics. The first word is capitalized, and the second word is not.
So, Giraffa camelopardalis is the scientific name. |
train/4138 | Which property do these three objects have in common? | [
"bouncy",
"stretchy",
"colorful"
] | 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 stretchy object gets longer when you pull on it. The candy sprinkles and the rainbow sucker are not stretchy.
A colorful object has one or more bright colors. All three objects are colorful.
A bouncy object will bounce back from the floor if you dr... |
train/4139 | Which of these states is farthest west? | [
"Illinois",
"Vermont",
"Arkansas",
"Connecticut"
] | 2 | closed choice | grade4 | 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 west arrow is pointing. Arkansas is farthest west. | |
train/4140 | Which property do these four objects have in common? | [
"flexible",
"fragile",
"rough"
] | 0 | Select the best answer. | closed choice | grade5 | 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 fragile object will break into pieces if you drop it. The paper, the track suit, and the belt are not fragile.
A flexible object can be folded or bent without breaking easily. All four objects are flexible.
A rough object feels scratchy when you to... |
train/4141 | Which country is highlighted? | [
"Nauru",
"New Zealand",
"Solomon Islands",
"Australia"
] | 3 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Australia.
Is Australia a country or a continent?
Both! Australia is a country in Oceania, a region made up of many lands and islands in the Pacific Ocean. Many people say that Australia is the world's smallest continent. But some people call Oceania a continent instead. | ||
train/4142 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade3 | 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. |
train/4143 | Which property do these two objects have in common? | [
"yellow",
"sticky"
] | 0 | 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 sticky object can stick to other things. The chalk is not sticky.
Yellow is a color.
This color is yellow. Both objects are yellow.
The property that both objects have in common is yellow. |
train/4144 | Which bird's beak is also adapted to get nectar out of long flowers? | [
"hawfinch",
"rufous hummingbird"
] | 1 | Green violetears live in the forests of Central and South America. The shape of the 's beak is adapted to get nectar out of long flowers.
Figure: green violetear. | 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 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 green violetear.
The green violetear has a long, thin beak. Its beak is adapted to get nectar out of long flowers. The green violetear's long, thin beak can reach deep into the flowers.
Now look at each bird. Figure out which bird has a similar adaptation.
The rufous hummingbird has a long, t... |
train/4145 | Which property do these three objects have in common? | [
"fragile",
"blue",
"sticky"
] | 1 | 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 sticky object can attach or stick to other things. The toothpaste is sticky, but the jeans and the track suit are not.
Blue is a color.
This color is blue. All three objects are blue.
A fragile object will break into pieces if you drop it. The jean... |
train/4146 | What can Herman and Clara trade to each get what they want? | [
"Herman can trade his tomatoes for Clara's broccoli.",
"Clara can trade her broccoli for Herman's oranges.",
"Herman can trade his tomatoes for Clara's carrots.",
"Clara can trade her almonds for Herman's tomatoes."
] | 0 | 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.
Herman and Clara open their lunch boxes in the school cafeteria. Neither Herman nor Clara got everything that they wanted. The ta... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Herman wants broccoli. Clara 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. | |
train/4147 | Which trait did Fagus have? Select the trait you can observe on the fossil. | [
"oval-shaped leaves",
"orange fruit",
"thorns along the sides of each leaf"
] | 0 | This picture shows a fossil of Fagus, a plant that grew in ancient forests. The fossil shows one of the Fagus's leaves. | closed choice | grade3 | 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... | |
train/4148 | Identify the question that Austen's experiment can best answer. | [
"Do cardinals eat more seeds per visit from feeders containing sunflower seeds compared to feeders containing flax seeds?",
"Do cardinals visit feeders containing sunflower seeds more often than feeders containing flax seeds?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Austen set up five pairs of platform bird feeders around his yard. He filled one feeder in each pair with sunflower seeds and the other feeder with flax seeds. For one week, Austen watched cardinals visiting the feeders... | 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... | |
train/4149 | Which of these states is farthest east? | [
"New Hampshire",
"Kansas",
"New Mexico",
"Ohio"
] | 0 | closed choice | grade4 | 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 east arrow is pointing. New Hampshire is farthest east. | |
train/4150 | Which animal's limbs are also adapted for swimming? | [
"jerboa",
"Galapagos sea lion"
] | 1 | Humpback whales are found in the world's oceans. They live underwater, but come to the surface to breathe air.
The has flippers for limbs. Its limbs are adapted for swimming.
Figure: humpback whale. | 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.
Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp... | Look at the picture of the humpback whale.
The humpback whale uses its flippers to help push itself through water. The flippers can also help it change direction while swimming.
Now look at each animal. Figure out which animal has a similar adaptation.
The Galapagos sea lion has flippers. Its limbs are adapted for swim... |
train/4151 | Which three months have an average precipitation of around 3.5inches in Seattle? | [
"May, June, and October",
"April, May, and November",
"February, March, and October"
] | 2 | Use the graph to answer the question below. | closed choice | grade4 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average precipitation for each month. The average precipitation can be used to describe the climate of a location.
A... | To describe the average precipitation trends in Seattle, look at the graph.
Choice "Feb" is incorrect.
Choice "Mar" is incorrect.
Choice "Apr" is incorrect.
Choice "May" is incorrect.
Choice "Jun" is incorrect.
Choice "Oct" is incorrect.
Choice "Nov" is incorrect.
Choice "February, March, and October" is incorrect.
Feb... |
train/4152 | What is the probability that a pea plant produced by this cross will be homozygous recessive for the pod color gene? | [
"1/4",
"4/4",
"3/4",
"2/4",
"0/4"
] | 3 | In a group of pea plants, some individuals have green pods and others have yellow pods. In this group, the gene for the pod color trait has two alleles. The allele for green pods (D) is dominant over the allele for yellow pods (d).
This Punnett square shows a cross between two pea plants. | 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... | |
train/4153 | Select the chemical formula for this molecule. | [
"HS",
"H3S2",
"H2S",
"HS2"
] | 2 | closed choice | grade7 | natural science | chemistry | Atoms and molecules | Identify chemical formulas for ball-and-stick models | Every substance around you is made up of atoms. Atoms can link together to form molecules. The links between atoms in a molecule are called chemical bonds. Different molecules are made up of different chemical elements, or types of atoms, bonded together.
Scientists use both ball-and-stick models and chemical formulas ... | H is the symbol for hydrogen. According to the legend, hydrogen atoms are shown in light gray. S is the symbol for sulfur. According to the legend, sulfur atoms are shown in yellow. This ball-and-stick model shows a molecule with two hydrogen atoms and one sulfur atom. The chemical formula will contain the symbols H an... | |
train/4154 | Is turquoise a mineral or a rock? | [
"mineral",
"rock"
] | 0 | Turquoise has the following properties:
not made by living things
pure substance
blue-green
found in nature
solid
fixed crystal structure | 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... | Turquoise has all the properties of a mineral. So, turquoise is a mineral. |
train/4155 | Is a baseball bat a solid, a liquid, or a gas? | [
"a gas",
"a liquid",
"a solid"
] | 2 | closed choice | grade3 | natural science | physics | States of matter | Classify matter as solid, liquid, or gas | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own.
Some solids can be easily folded, bent, or broken. A piece of paper is a... | A baseball bat is a solid. A solid has a size and shape of its own.
If you pick up a baseball bat, it will still have a size and shape of its own. | |
train/4156 | Which country is highlighted? | [
"Tuvalu",
"Samoa",
"the Federated States of Micronesia",
"Palau"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Palau. | ||
train/4157 | Which of the following could Jeremiah's test show? | [
"the amount of sunlight the roof would get throughout the year",
"which side of the roof got more sun over one day",
"how many solar panels could fit on each side of the roof"
] | 1 | 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... | |
train/4158 | Select the organism in the same genus as the mountain zebra. | [
"Macropus rufus",
"Equus grevyi",
"Cervus canadensis"
] | 1 | This organism is a mountain zebra. Its scientific name is Equus zebra. | closed choice | grade4 | natural science | biology | 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 mountain zebra's scientific name is Equus zebra. The first word of its scientific name is Equus.
Equus grevyi is in the genus Equus. The first word of its scientific name is Equus. So, Equus grevyi and Equus zebra are in the same genus.
Macropus rufus is in the genus Macropus. The first word of its scientific name is... |
train/4159 | Which of these continents does the prime meridian intersect? | [
"Australia",
"North America",
"Europe"
] | 2 | closed choice | grade5 | 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 Europe. It does not intersect Australia or North America. | |
train/4160 | Which animal's feet are also adapted for grabbing prey? | [
"Australian pelican",
"red-tailed hawk"
] | 1 | Golden eagles eat fish, mammals, and other birds. The 's feet are adapted to grab prey.
Figure: golden 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 golden eagle.
The golden eagle has long toes with sharp claws. Its feet are adapted for grabbing prey. The sharp claws can help the golden 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.
... |
train/4161 | Look at the models of molecules below. Select the elementary substance. | [
"cyclopropane",
"trichlorofluoromethane",
"oxygen"
] | 2 | closed choice | grade6 | natural science | chemistry | Atoms and molecules | Identify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | ||
train/4162 | What is the capital of North Carolina? | [
"Frankfort",
"Raleigh",
"Austin",
"Atlanta"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Raleigh is the capital of North Carolina. | ||
train/4163 | 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 2.",
"The magnetic force is weaker in Pair 1."
] | 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. | 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. |
train/4164 | Select the organism in the same genus as the salt marsh snake. | [
"Lacerta agilis",
"Corallus hortulanus",
"Nerodia cyclopion"
] | 2 | This organism is a salt marsh snake. Its scientific name is Nerodia clarkii. | 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 salt marsh snake's scientific name is Nerodia clarkii. The first word of its scientific name is Nerodia.
Nerodia cyclopion is in the genus Nerodia. The first word of its scientific name is Nerodia. So, Nerodia cyclopion and Nerodia clarkii are in the same genus.
Lacerta agilis is in the genus Lacerta. The first word ... |
train/4165 | Identify the question that Gina's experiment can best answer. | [
"Can light bulbs stay lit longer when circuits include copper or when circuits include iron?",
"Do circuits that include iron produce dimmer light than circuits that include copper?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Gina built an electric circuit: she used wires to connect a battery to a light bulb, the light bulb to a small piece of copper, and the copper back to the battery. When the circuit was complete, the light turned on. Gin... | 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... | |
train/4166 | What type of rock is quartzite? | [
"igneous",
"metamorphic",
"sedimentary"
] | 1 | This is a piece of quartzite. Quartzite forms when sandstone is changed by high temperature and pressure.
Quartzite is made mostly of the mineral quartz. It can also contain small amounts of other minerals. Depending on the minerals it contains, a piece of quartzite can be white, gray, pink, red, green, or blue. | closed choice | grade7 | natural science | earth-science | Rocks and minerals | Classify rocks as igneous, sedimentary, or metamorphic | Igneous rock is formed when melted rock cools and hardens into solid rock. This type of change can occur at Earth's surface or below it.
Sedimentary rock is formed when layers of sediment are pressed together, or compacted, to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when ... | Quartzite is a metamorphic rock. Like other metamorphic rocks, it forms when a rock is changed by high temperature and pressure.
Heat and pressure can change the type and arrangement of minerals in a rock. This change forms a new rock with different properties. Quartzite can form when sedimentary rocks such as sandston... |
train/4167 | Identify the question that Owen's experiment can best answer. | [
"Do steel nails take fewer days to rust in water compared to vinegar?",
"Do steel nails rust in fewer days when submerged in a large volume of liquid compared to a small volume?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Owen 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. O... | 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... | |
train/4168 | What is the capital of Oregon? | [
"Portland",
"Salem",
"Carson City",
"Baltimore"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. | ||
train/4169 | Which type of force from the hiker's hand picks up the litter? | [
"push",
"pull"
] | 1 | A hiker uses her hand to clean up litter. Her hand applies a force to the litter and picks it up. | closed choice | grade3 | natural science | physics | Force and motion | Identify pushes and pulls | A force is a push or a pull that one object applies to a second object.
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 hiker's hand applies a force to the litter. This force picks the litter up off of the ground. The direction of this force is toward the hiker's hand. This force is a pull. |
train/4170 | Which state is highlighted? | [
"Kentucky",
"South Carolina",
"Virginia",
"Georgia"
] | 1 | closed choice | grade5 | social science | geography | States | Identify states of the Southeast | This state is South Carolina. | ||
train/4171 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"neither; the samples have the same temperature"
] | 1 | 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... | The particles in both samples have the same average speed, but each particle in sample B has more mass than each particle 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 kinetic energy, sample B mus... |
train/4172 | What is the name of the colony shown? | [
"Wisconsin",
"Delaware",
"Rhode Island",
"Georgia"
] | 3 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Georgia. | ||
train/4173 | Which of the following organisms is the omnivore in this food web? | [
"silver maple",
"beaver",
"gray fox",
"pine vole"
] | 3 | Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia.
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 | grade7 | natural science | biology | Ecological interactions | Interpret food webs I | 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... | Omnivores are consumers that eat both producers and other consumers. So, an omnivore has arrows pointing to it from at least one producer and at least one consumer.
The pine vole has an arrow pointing to it from the persimmon tree, which is a producer. The pine vole also has an arrow pointing to it from the swallowtail... |
train/4174 | Which i in column 1? | [
"the police department",
"the pond",
"the school",
"the fire department"
] | 1 | closed choice | grade3 | social science | geography | Geography | Use a letter-number grid | A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map.
A row is a line of squares that goes from side to side. Rows are marked with letters.
A column is a line of squares that goes up and down. Columns are marked with numbers. | The pond is in column 1. | |
train/4175 | Which animal's mouth is also adapted to get insects out of burrows? | [
"proboscis monkey",
"tamandua"
] | 1 | Long-beaked echidnas eat animals such as insects. These insects often live in holes called burrows. The echidna's mouth is adapted to get insects out of burrows.
Figure: long-beaked echidna. | 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 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 long-beaked echidna.
A tube-shaped snout helps the long-beaked echidna reach into a burrow. A long, sticky tongue helps it catch the insects.
Now look at each animal. Figure out which animal has a similar adaptation.
The tamandua has a tube-shaped snout and a long, sticky tongue. Its mouth is... |
train/4176 | Based on the Venn diagram, which statement is true? | [
"Sea turtles have fins.",
"Sea turtles breathe air."
] | 1 | This Venn diagram shows information about some sea animals. | closed choice | grade5 | 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... | In a Venn diagram, each circle shows things that are true for a particular topic. The middle, where the two circles overlap, shows things that are true for both topics. This Venn diagram shows information about some sea animals.
The breathes air circle includes sea turtle, as well as whale and otter. This tells you tha... |
train/4177 | Is the following statement about our solar system true or false?
50% of the planets are made mainly of gas. | [
"true",
"false"
] | 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 two out of the eight planets are made mainly of gas. So, one-fourth, or 25%, of the planets are made mainly of gas. |
train/4178 | Identify the question that Zane's experiment can best answer. | [
"Does apple juice expand more or less than water when it freezes?",
"Does water freeze more quickly than apple juice?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Zane poured 30 milliliters of water into each of six measuring cups. He poured the same volume of apple juice into another six measuring cups. He kept the measuring cups in a freezer for 48 hours. Zane then observed the... | 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... | |
train/4179 | Which property do these three objects have in common? | [
"stretchy",
"blue",
"fuzzy"
] | 1 | 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 stretchy object gets longer when you pull on it. The track suit is stretchy, but the water slide and the sapphire are not.
Blue is a color.
This color is blue. All three objects are blue.
A fuzzy object is covered in soft hair. The water slide and ... |
train/4180 | Is Rhizophora mangle made up of one cell? | [
"no",
"yes"
] | 0 | This organism is Rhizophora mangle. It is a member of the plant kingdom.
Rhizophora mangle is commonly called a red mangrove. Red mangrove trees grow in or near water. They have strong roots that help prop, or hold, them up. These roots are also aerial, which means that they can grow above the ground. So, the red mangr... | 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... | Rhizophora mangle is a plant. Plants are made up of many cells. |
train/4181 | Is cotton a mineral? | [
"no",
"yes"
] | 0 | Cotton has the following properties:
no fixed crystal structure
made by a cotton plant
not a pure substance
found in nature
solid | 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... | Cotton does not have all the properties of a mineral. So, cotton is not a mineral. |
train/4182 | Identify the question that Lamar's experiment can best answer. | [
"Can pennies hold more drops of pure water or water mixed with hand soap?",
"Can pennies hold more drops of water mixed with dish soap or water mixed with hand soap?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Lamar 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. Lamar recorded the number of drops he could add before the wa... | 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... | |
train/4183 | Which property do these three objects have in common? | [
"stretchy",
"rough",
"sour"
] | 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.
A rough object feels scratchy when you touch it. The melted marshmallow and the spring are not rough.
A lemon has a sour taste. The melted marshmallow is not sour.
A stretchy object gets longer when you pull on it. All three objects are stretchy.
The... |
train/4184 | What is the capital of Rhode Island? | [
"Boston",
"Newport",
"Providence",
"Montpelier"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Providence is the capital of Rhode Island. | ||
train/4185 | Which of these states is farthest west? | [
"Maine",
"Texas",
"Rhode Island",
"Georgia"
] | 1 | 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. Texas is farthest west. | |
train/4186 | What type of rock is dolerite? | [
"igneous",
"metamorphic",
"sedimentary"
] | 0 | Dolerite forms from melted rock. It can form when melted rock cools close to the earth's surface. It is made of minerals such as feldspar and pyroxene.
Dolerite is usually found in dikes. In geology, a dike is a gap in an old rock where a new rock can form. Sometimes, melted rock from below the earth's surface can leak... | closed choice | grade7 | natural science | earth-science | Rocks and minerals | Classify rocks as igneous, sedimentary, or metamorphic | Igneous rock is formed when melted rock cools and hardens into solid rock. This type of change can occur at Earth's surface or below it.
Sedimentary rock is formed when layers of sediment are pressed together, or compacted, to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when ... | Dolerite is an igneous rock. Like other igneous rocks, it forms when melted rock cools and hardens.
Melted rock below the earth's surface is called magma. Dolerite forms from silica-rich magma that is close to the earth's surface. As the magma cools, minerals such as feldspar and pyroxene begin to form. When the magma ... |
train/4187 | 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 greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 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 | 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 smaller distance between magnets, the magnitude of the magnetic force between them is greater.
There is a smaller distance between the magnets in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2. |
train/4188 | What is the capital of Hawaii? | [
"Baton Rouge",
"Phoenix",
"Honolulu",
"Hilo"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Honolulu is the capital of Hawaii. | ||
train/4189 | Which animal is also adapted to be camouflaged in the snow? | [
"Arctic wolf",
"naked mole rat"
] | 0 | Polar bears live in and around the cold Arctic Ocean. The is adapted to be camouflaged in the snow.
Figure: polar bear. | 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 polar bear.
The polar bear has white fur covering its body. It is adapted to be camouflaged in the snow. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
This Arctic wolf has white fur covering its body. It is adapted to be camo... |
train/4190 | What is the capital of Idaho? | [
"Helena",
"Nampa",
"Boise",
"Philadelphia"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Boise is the capital of Idaho. | ||
train/4191 | 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 B",
"sample A"
] | 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... | The particles in both samples have the same average speed, but each particle in sample A has more mass than each particle 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, sample A mus... |
train/4192 | Which part of the purple artichoke plant do we usually eat? | [
"the stem",
"the flowers",
"the fruit"
] | 1 | People use purple artichoke plants for food. We usually eat the part of this plant that makes seeds and fruit. | closed choice | grade4 | natural science | biology | Plants | Classify fruits and vegetables as plant parts | The fruits and vegetables we eat are parts of plants! Plants are made up of different structures. The different structures carry out important functions.
The roots take in water and nutrients from the soil. They also hold the plant in place in the soil.
The stem supports the plant. It carries food, water, and nutrients... | The part of the purple artichoke plant we usually eat is the flowers. They make seeds. |
train/4193 | What can Rita and Shannon trade to each get what they want? | [
"Rita can trade her tomatoes for Shannon's broccoli.",
"Shannon can trade her almonds for Rita's tomatoes.",
"Shannon can trade her broccoli for Rita's oranges.",
"Rita can trade her tomatoes for Shannon's carrots."
] | 0 | 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.
Rita and Shannon open their lunch boxes in the school cafeteria. Neither Rita nor Shannon got everything that they wanted. The ta... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Rita wants broccoli. Shannon 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. | |
train/4194 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"neither; the samples have the same temperature",
"sample A"
] | 1 | 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, and the particles in both samples have the same average speed. So, the particles in both samples have the same average kinetic energy.
Because the particles in both samples have the same average kinetic energy, the samples must have the same temperature. |
train/4195 | Complete the statement.
Rubidium chloride is (). | [
"a compound",
"an elementary substance"
] | 0 | The model below represents rubidium chloride. Rubidium chloride is used in medical research. | closed choice | grade7 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | Use the model to determine whether rubidium chloride is an elementary substance or a compound.
Step 1: Interpret the model.
.
Use the legend to determine the chemical element represented by each color. The colors and atomic symbols from the legend are shown in the table below. The table also includes the names of the c... |
train/4196 | Is celestine a mineral or a rock? | [
"mineral",
"rock"
] | 0 | Celestine has the following properties:
naturally occurring
fixed crystal structure
pure substance
not made by living things
solid
non-metallic luster | 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... | Celestine has all the properties of a mineral. So, celestine is a mineral. |
train/4197 | Which statement describes the Kibale National Forest ecosystem? | [
"It has only a few types of organisms.",
"It has many different types of organisms.",
"It has mostly small plants."
] | 1 | Figure: Kibale National Forest.
Kibale National Forest is a tropical rain forest ecosystem in Uganda, a country in eastern Africa. This rain forest is home to many African primates, including chimpanzees. | closed choice | grade7 | 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, the following statement describes the Kibale National Forest ecosystem: year-round rain and warm temperature... |
train/4198 | Which ocean is highlighted? | [
"the Pacific Ocean",
"the Arctic Ocean",
"the Southern Ocean",
"the Atlantic Ocean"
] | 0 | closed choice | grade8 | 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. | |
train/4199 | Which ocean is highlighted? | [
"the Southern Ocean",
"the Pacific Ocean",
"the Arctic Ocean",
"the Indian Ocean"
] | 3 | closed choice | grade8 | 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 Indian Ocean. |
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