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train/2700 | What is the probability that a sheep produced by this cross will be homozygous dominant for the fleece type gene? | [
"0/4",
"1/4",
"3/4",
"2/4",
"4/4"
] | 0 | This passage describes the fleece type trait in sheep:
The fleece, or outer coat, of a sheep is often cut off and used to make yarn for fabrics and other textiles. Woolly fleeces, which have shorter hairs, are usually used for clothing and blankets. Hairy fleeces, which have longer hairs, are usually used for carpets.
... | 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/2701 | Which better describes the Gobi Desert ecosystem? | [
"It has dry, thin soil. It also has long, cold winters.",
"It has heavy snow. It also has only a few types of trees."
] | 0 | Figure: Gobi Desert.
The Gobi Desert is a cold desert ecosystem in northern China and southern Mongolia. | 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 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 Gobi Desert has dry, thin soil. It also has long, cold winters. |
train/2702 | What can a seed grow into? | [
"a fruit",
"a flower",
"a new plant"
] | 2 | This tomato has seeds inside. | closed choice | grade4 | natural science | biology | Plants | Describe and construct flowering plant life cycles | Many plants have flowers. These plants can use their flowers to reproduce, or make new plants like themselves. How do plants use their flowers to reproduce?
First, the male part of the flower makes pollen, and the female part makes eggs. Animals, wind, or water can move pollen. Pollination is what happens when pollen i... | A seed can germinate and grow into a new plant.
The new plant can grow fruit and flowers. But a seed does not grow into a fruit or a flower. |
train/2703 | Is Asimina triloba made up of one cell? | [
"yes",
"no"
] | 1 | This organism is Asimina triloba. It is a member of the plant kingdom.
Asimina triloba is commonly called the pawpaw. Pawpaw trees grow in the southeastern part of the United States. They have large, sweet fruit. The fruit is sometimes called a prairie banana. | 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... | Asimina triloba is a plant. Plants are made up of many cells. |
train/2704 | Which ocean is highlighted? | [
"the Atlantic Ocean",
"the Southern Ocean",
"the Pacific Ocean",
"the Arctic Ocean"
] | 1 | 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 Southern Ocean.
The Southern Ocean reaches from the shores of Antarctica to 60° South latitude. | |
train/2705 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 0 | Two magnets are placed as shown. | closed choice | grade4 | 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: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/2706 | During this time, thermal energy was transferred from () to (). | [
"each aquarium . . . the surroundings",
"the surroundings . . . each aquarium"
] | 0 | 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. |
train/2707 | Is the following statement about our solar system true or false?
Of the four smallest planets, two are made mainly of gas. | [
"false",
"true"
] | 0 | 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 decide which four planets are the smallest, look at the volumes and compare the exponents. The volumes of Mercury, Venus, Earth, and Mars have the smallest exponents. So, these four planets are the smallest.
These four planets are made mainly of rock. So, of the four smallest planets, none are made mainly of gas. |
train/2708 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each vial",
"each vial . . . the surroundings"
] | 0 | Scientists in a laboratory were working with insulin, a protein often used to treat diabetes. They left two identical vials of insulin in different places. This table shows how the temperature of each vial 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 vial increased, which means that the thermal energy of each vial increased. So, thermal energy was transferred from the surroundings to each vial. |
train/2709 | Is the following statement about our solar system true or false?
The four largest planets are made mainly of gas or ice. | [
"true",
"false"
] | 0 | 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 decide which four planets are the largest, look at the volumes and compare the exponents. The volumes of Jupiter, Saturn, Uranus, and Neptune have the largest exponents. So, these four planets are the largest.
Jupiter and Saturn are made mainly of gas. Uranus and Neptune are made mainly of ice. So, the four largest ... |
train/2710 | 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 1.",
"The magnetic force is weaker in Pair 2.",
"The strength 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. | 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.
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. |
train/2711 | Select the bird below. | [
"toco toucan",
"rabbit"
] | 0 | Birds have feathers, two wings, and a beak. A peregrine falcon is an example of a bird. | 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 rabbit is a mammal. It has fur and feeds its young milk.
Rabbits live underground in burrows. A group of rabbit burrows is called a warren.
A toco toucan is a bird. It has feathers, two wings, and a beak.
Toucans have large beaks. A toucan's beak can be half as long as its body. |
train/2712 | Which solution has a higher concentration of purple particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each purple 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 purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container.
Use the concentration formula to find the number of purple particles per mill... |
train/2713 | Which solution has a higher concentration of yellow particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 0 | The diagram below is a model of two solutions. Each yellow ball represents one particle of solute. | closed choice | grade6 | 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... |
train/2714 | 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 2.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger 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 | 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.
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 2 are closer together than the magnets in Pair 1. So, the magnetic force is stronger in Pair 2 than in Pair 1. |
train/2715 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Lake Titicaca.
Lake Titicaca is a large, deep lake on the border between Peru and Bolivia. A strong south wind blew across the water last night.
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 | grade5 | 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.
Lake Titicaca is a large, deep lake on the border between Peru and Bolivia. A strong south wind blew across the water last night.
The underlined part of the passage tells you about the wind direction at Lake Titicaca last night. This passage describes the atmosphere at a certain place and ti... |
train/2716 | Which ocean is highlighted? | [
"the Indian Ocean",
"the Pacific Ocean",
"the Arctic Ocean",
"the Atlantic Ocean"
] | 2 | closed choice | grade7 | 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 Arctic Ocean. | |
train/2717 | Which statement describes the Catoctin Mountain Park ecosystem? | [
"It has soil that is poor in nutrients.",
"It has only a few types of trees.",
"It has many different types of trees."
] | 1 | Figure: Catoctin Mountain Park.
Catoctin Mountain Park is a temperate deciduous forest ecosystem in Maryland. Most of this forest was cut down for its wood in the early 1900s. But since the 1940s, conservation efforts have allowed the forest to return to much of this park. | 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 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 following statement describes the Catoctin Mountain Park ecosystem: warm, wet summers and cold, we... |
train/2718 | What type of rock is gneiss? | [
"metamorphic",
"sedimentary",
"igneous"
] | 0 | This is a piece of gneiss. Gneiss is a rock made of minerals such as biotite and garnet. The minerals in gneiss are often arranged in bands.
Gneiss can form when a rock is changed by high temperature and pressure. Gneiss is often found deep inside the Earth's crust. | 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 ... | Gneiss 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. Gneiss can form when sedimentary, igneous, or other metamorph... |
train/2719 | Select the fish below. | [
"bull shark",
"Hermann's tortoise",
"olive toad",
"horned frog"
] | 0 | Fish live underwater. They have fins, not limbs.
Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A goldfish is an example of a fish. | 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 bull shark is a fish. It lives underwater. It has fins, not limbs.
Bull sharks can live in both fresh and salt water. They are found in rivers and in shallow parts of the ocean.
An olive toad is an amphibian. It has moist skin and begins its life in water.
Toads do not have teeth! They swallow their food whole.
A hor... |
train/2720 | Look at the models of molecules below. Select the elementary substance. | [
"ozone",
"ethanol",
"trichlorofluoromethane"
] | 0 | 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/2721 | What is the capital of Oregon? | [
"Honolulu",
"Salem",
"Missoula",
"Portland"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. | ||
train/2722 | Which color does this map use to show land that is not covered by water or ice? | [
"green and brown",
"blue and white"
] | 0 | This is a map of Earth. The map uses color to show where water, land, and ice are found. | closed choice | grade3 | natural science | earth-science | Earth's features | Water on Earth | Many maps of Earth use color to show different areas.
Green and brown show land that is not covered by water or ice.
Blue shows liquid water in oceans, rivers, lakes, and other bodies of water.
White shows frozen water. These parts of Earth's surface are covered by ice. | Green and brown are used to show land not covered by water or ice. |
train/2723 | Complete the statement.
2-chloroethanol is (). | [
"an elementary substance",
"a compound"
] | 1 | The model below represents a molecule of 2-chloroethanol. 2‑Chloroethanol is a poisonous substance used to make chemicals that kill insects. | closed choice | grade8 | 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 2-chloroethanol 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 che... |
train/2724 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 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 north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/2725 | Select the bird below. | [
"parrotfish",
"porcupinefish",
"Tasmanian devil",
"white stork"
] | 3 | Birds have feathers, two wings, and a beak.
Birds are warm-blooded. Warm-blooded animals can control their body temperature.
A blue-footed booby is an example of a bird. | 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 porcupinefish is a fish. It lives underwater. It has fins, not limbs.
Porcupinefish can puff up their bodies with air or water to scare off predators.
A white stork is a bird. It has feathers, two wings, and a beak.
Storks wade in shallow water to look for food. Storks eat fish, insects, worms, and other small animal... |
train/2726 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | 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 north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/2727 | Is chrysotile a mineral or a rock? | [
"mineral",
"rock"
] | 0 | Chrysotile has the following properties:
pure substance
found in nature
not made by living things
translucent
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... | Chrysotile has all the properties of a mineral. So, chrysotile is a mineral. |
train/2728 | What is the expected ratio of offspring with sweet fruit to offspring with sour fruit? Choose the most likely ratio. | [
"1:3",
"4:0",
"0:4",
"3:1",
"2:2"
] | 0 | In a group of muskmelon plants, some individuals have sour fruit and others have sweet fruit. In this group, the gene for the fruit taste trait has two alleles. The allele for sweet fruit (f) is recessive to the allele for sour fruit (F).
This Punnett square shows a cross between two muskmelon 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 sweet fruit or sour fruit, consider whether each phenotype is the dominant or recessive allele's version of the fruit taste trait. The question tells you that the f allele, which is for sweet fruit, is recessive to the F allele, which is for sou... |
train/2729 | What is the capital of Maryland? | [
"Annapolis",
"Biloxi",
"Albany",
"Baltimore"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | ||
train/2730 | Which country is highlighted? | [
"Cuba",
"Jamaica",
"Haiti",
"The Bahamas"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Cuba.
Does Cuba have any territorial disputes?
Cuba claims to own Guantanamo Bay Naval Base, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
The United States controls the area and uses it as a military base and prison. A treaty... | ||
train/2731 | Which of these states is farthest east? | [
"South Dakota",
"Texas",
"Illinois",
"Georgia"
] | 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 east arrow is pointing. Georgia is farthest east. | |
train/2732 | What is the capital of Oregon? | [
"Portland",
"Salem",
"Cheyenne",
"Colorado Springs"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Salem is the capital of Oregon. | ||
train/2733 | Which statement describes the Steigerwald Forest ecosystem? | [
"It has warm, wet summers and cold, wet winters.",
"It has many different types of trees."
] | 0 | Figure: Steigerwald Forest.
The Steigerwald Forest is a temperate deciduous forest ecosystem in Bavaria, a state in southern Germany. This forest has many oak and beech trees. | 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 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 following statements describe the Steigerwald Forest ecosystem: warm, wet summers and cold, wet wi... |
train/2734 | What is the name of the colony shown? | [
"Delaware",
"Wisconsin",
"New Jersey",
"Massachusetts"
] | 0 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/2735 | What can Peter and Bill trade to each get what they want? | [
"Peter can trade his tomatoes for Bill's broccoli.",
"Peter can trade his tomatoes for Bill's carrots.",
"Bill can trade his broccoli for Peter's oranges.",
"Bill can trade his almonds for Peter'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.
Peter and Bill open their lunch boxes in the school cafeteria. Neither Peter nor Bill got everything that they wanted. The table ... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Peter wants broccoli. Bill 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/2736 | 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."
] | 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 | grade8 | 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,... | Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are the same as in Pair 2. The distance between the magnets is also the same.
So, the magnitude of the magnetic force is the same in both pairs. |
train/2737 | What is the capital of Oklahoma? | [
"Austin",
"Tulsa",
"Baton Rouge",
"Oklahoma City"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Oklahoma City is the capital of Oklahoma. | ||
train/2738 | 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 | 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 2 attract. The magnets in Pair 1 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.
Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magni... |
train/2739 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | 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 south pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/2740 | What is the capital of Colorado? | [
"Juneau",
"Little Rock",
"Denver",
"Boulder"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | ||
train/2741 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Baja California.
Baja California is a state in Mexico. It receives between 12 and 24 inches of rain 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 | grade5 | 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.
Baja California is a state in Mexico. It receives between 12 and 24 inches of rain each year.
The underlined part of the passage tells you about the usual pattern of precipitation in Baja California. This passage does not describe what the weather is like on a particular day. So, this passag... |
train/2742 | Which material is these crayons made of? | [
"rubber",
"wax"
] | 1 | closed choice | grade2 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the crayons.
The crayons are made of two different materials. The label is made of paper. The rest of the crayon is made of wax.
Crayons are made by melting the wax and pouring it into special molds. | |
train/2743 | Which state is highlighted? | [
"Maine",
"Massachusetts",
"Delaware",
"New York"
] | 3 | closed choice | grade3 | social science | geography | States | Identify states of the Northeast | This state is New York. | ||
train/2744 | Is the following statement about our solar system true or false?
The volume of Mercury is less than one-tenth of the volume of Earth. | [
"true",
"false"
] | 0 | 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 one-tenth the volume of Earth.
Then compare the result to the volume of Mercury. The volume of Mercury is 60 billion km^3, which is less than 109 billion km^3. So, the volume of Mercury is less than one-tenth of the volume of Earth. |
train/2745 | What is the capital of Minnesota? | [
"Madison",
"Saint Paul",
"Minneapolis",
"Columbus"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Saint Paul is the capital of Minnesota. | ||
train/2746 | Which statement is true about the average monthly precipitation in Charlotte? | [
"Charlotte has a rainy season and a dry season.",
"Precipitation does not change much from month to month.",
"January is the month with the highest average precipitation."
] | 1 | Use the graph to answer the question below. | closed choice | grade3 | 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.
A bar graph can be used to show the average amount of precipitation each month. Months with taller bars have more precipitation on average. | To describe the average precipitation trends in Charlotte, look at the graph.
Choice "Jan" is incorrect.
Choice "January is the month with the highest average precipitation." is incorrect.
Several other months have a slightly higher average precipitation than January.
Choice "Charlotte has a rainy season and a dry seas... |
train/2747 | Which property matches this object? | [
"bouncy",
"breakable"
] | 0 | Select the better answer. | closed choice | grade2 | 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. | Look at the object.
Think about each property.
A bouncy object will bounce back from the floor if you drop it. The tennis ball is bouncy.
A breakable object will break into pieces if you drop it. The tennis ball is not breakable. |
train/2748 | Which air temperature was measured within the outlined area shown? | [
"19°C",
"2°C",
"27°C"
] | 0 | The map below shows air temperatures in the lower atmosphere on February 21, 2017. The outlined area shows an air mass that influenced weather in Africa on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Laborat... | closed choice | grade6 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show air temperatures.
The map's legend tells you the temperature that each color represents. Colors on the left in the legend represent lower temperatures than colors on the right. For ... | Look at the colors shown within the outlined area. Then, use the legend to determine which air temperatures those colors represent.
The legend tells you that this air mass contained air with temperatures between 5°C and 20°C.
19°C is within this range.
2°C and 27°C are outside of this range. |
train/2749 | Which bird's beak is also adapted to catch fish? | [
"great blue heron",
"indigo bunting"
] | 0 | Common kingfishers live near wetlands, marshes, and lakes. They eat mostly fish. The shape of the 's beak is adapted to catch fish.
Figure: common kingfisher. | 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 common kingfisher.
The common kingfisher has a long, straight beak with a sharp tip. Its beak is adapted to catch fish. The common kingfisher can use its beak to grab the slippery body of a fish underwater. It can also catch a fish by stabbing it with its beak.
Now look at each bird. Figure o... |
train/2750 | Identify the question that Ezra's experiment can best answer. | [
"Do bananas develop more brown spots if they are kept in bags with holes compared to bags without holes?",
"Do bananas develop more brown spots when they are kept at room temperature compared to in a cold refrigerator?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Ezra divided 40 evenly among eight paper bags and sealed the bags. He poked 20 small holes in four of the bags and left the other four without holes. He kept the bags at room temperature for three days. Then, Ezra open... | 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/2751 | What is the probability that a human produced by this cross will be homozygous recessive for the xeroderma pigmentosum gene? | [
"3/4",
"2/4",
"4/4",
"0/4",
"1/4"
] | 1 | This passage describes the xeroderma pigmentosum trait in humans:
Xeroderma pigmentosum is a condition that causes skin to be easily damaged by sunlight. Humans with xeroderma pigmentosum avoid exposure to sunlight by wearing protective clothing, using sunscreen, and not going outside during the day.
In a group of huma... | 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/2752 | Select the organism in the same genus as the Morelet's tree frog. | [
"Chroicocephalus novaehollandiae",
"Agalychnis spurrelli",
"Crocodylus moreletii"
] | 1 | This organism is a Morelet's tree frog. Its scientific name is Agalychnis moreletii. | 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 Morelet's tree frog's scientific name is Agalychnis moreletii. The first word of its scientific name is Agalychnis.
Crocodylus moreletii and Agalychnis moreletii are not in the same genus.
These organisms are not in the same genus, but part of their scientific names is the same. Crocodylus moreletii and Agalychnis mo... |
train/2753 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Botswana.
Botswana has the largest population of elephants in Africa. Wet, cloudy conditions during December, January, and February fill the creeks and rivers where elephants often gather.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain pl... | 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.
Botswana has the largest population of elephants in Africa. Wet, cloudy conditions during December, January, and February fill the creeks and rivers where elephants often gather.
The underlined part of the passage tells you about the usual pattern of cloud cover in Botswana. This passage doe... |
train/2754 | Select the amphibian below. | [
"sugar glider",
"tiger salamander",
"loon",
"sea otter"
] | 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.
An African bullfrog 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 loon is a bird. It has feathers, two wings, and a beak.
Loons usually live near lakes. They dive in the water to hunt for food.
A sea otter is a mammal. It has fur and feeds its young milk.
Sea otters have very thick fur. Their fur keeps them warm in cold water.
A tiger salamander is an amphibian. It has moist skin a... |
train/2755 | Identify the question that Emma's experiment can best answer. | [
"Does the amount of water in a glass affect whether eggs sink or float in the water?",
"Are eggs more likely to float in fresh water or salty water?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Emma poured four ounces of water into each of six glasses. Emma dissolved one tablespoon of salt in each of three glasses, and did not add salt to the other three. Then, Emma placed an egg in one glass and observed if t... | 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/2756 | Select the reptile below. | [
"bull shark",
"Chinese alligator"
] | 1 | Reptiles have scaly, waterproof skin. Most reptiles live on land. A box turtle is an example of a reptile. | 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 Chinese alligator is a reptile. It has scaly, waterproof skin.
Alligators live in and around water. They can live near ponds, rivers, marshes, and lakes.
A bull shark is a fish. It lives underwater. It has fins, not limbs.
Bull sharks can live in both fresh and salt water. They are found in rivers and in shallow part... |
train/2757 | What can Troy and Johnny trade to each get what they want? | [
"Troy can trade his tomatoes for Johnny's broccoli.",
"Johnny can trade his almonds for Troy's tomatoes.",
"Johnny can trade his broccoli for Troy's oranges.",
"Troy can trade his tomatoes for Johnny'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.
Troy and Johnny open their lunch boxes in the school cafeteria. Neither Troy nor Johnny got everything that they wanted. The tabl... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Troy wants broccoli. Johnny 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/2758 | Which country is highlighted? | [
"Palau",
"Fiji",
"Tonga",
"Samoa"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Samoa. | ||
train/2759 | What is the capital of Alabama? | [
"Richmond",
"Montgomery",
"Charleston",
"Rapid City"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Montgomery is the capital of Alabama. | ||
train/2760 | Is aluminum foil a solid, a liquid, or a gas? | [
"a liquid",
"a solid",
"a gas"
] | 1 | closed choice | grade4 | natural science | physics | States of matter | Identify and sort solids, liquids, and gases | 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... | Aluminum foil is a solid that can be folded or torn. But if you fold a piece of aluminum foil, it will still have a size and shape of its own. If you tear a piece of aluminum foil into smaller pieces, each piece will still have a size and shape of its own. | |
train/2761 | In this food web, which organism contains matter that eventually moves to the parasol fungus? | [
"gray fox",
"persimmon tree"
] | 1 | 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 | grade8 | natural science | biology | Ecological interactions | Interpret food webs II | 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... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows to the parasol fungus.There are four paths matter can take from the persimmon tree to the parasol fungus: persimmon tree->pine vole->parasol fungus. persimmon tree-> black bear->parasol fungus. persimmo... |
train/2762 | Which animal's feet are also adapted for swimming? | [
"giraffe",
"platypus"
] | 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 | grade4 | 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 pl... |
train/2763 | Select the organism in the same species as the crystal jellyfish. | [
"Cyanea capillata",
"Aurelia aurita",
"Aequorea victoria"
] | 2 | This organism is a crystal jellyfish. Its scientific name is Aequorea victoria. | 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 crystal jellyfish's scientific name is Aequorea victoria.
Aurelia aurita does not have the same scientific name as a crystal jellyfish. So, Aequorea victoria and Aurelia aurita are not in the same species.
Aequorea victoria has the same scientific name as a crystal jellyfish. So, these organisms are in the same speci... |
train/2764 | Which solution has a higher concentration of yellow particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 0 | 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... |
train/2765 | What is the capital of Vermont? | [
"Trenton",
"Montpelier",
"Wilmington",
"Burlington"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Montpelier is the capital of Vermont. | ||
train/2766 | Which of the following could Aaron's test show? | [
"which design would have the least traffic noise in the concert area",
"if at least 20% of the park would be shaded by trees in each design",
"which design would have the greatest distance between the concert area and the road"
] | 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... | |
train/2767 | Which better describes the Tallgrass Prairie National Preserve ecosystem? | [
"It has cool winters. It also has a medium amount of rain.",
"It has a small amount of rain. It also has dry, thin soil."
] | 0 | Figure: Tallgrass Prairie National Preserve.
Tallgrass Prairie National Preserve is a prairie grassland ecosystem in eastern Kansas. | 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 prairie grassland is a type of ecosystem. Prairie grasslands have the following features: hot summers and cool winters, a medium amount of rain, and soil that is rich in nutrients. So, Tallgrass Prairie National Preserve has cool winters. It also has a medium amount of rain. |
train/2768 | What is the capital of Idaho? | [
"Tucson",
"Nampa",
"Salem",
"Boise"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Boise is the capital of Idaho. | ||
train/2769 | Which term matches the picture? | [
"marsupial",
"monotreme"
] | 1 | Read the text.
Marsupials and monotremes represent two unique subgroups of mammals. Marsupials, like most mammals, give birth to live young. Unlike other mammals, however, many marsupials carry their young in a pouch. Well-known marsupials include kangaroos, koalas, and possums.
Monotremes, on the other hand, do not gi... | closed choice | grade6 | language science | vocabulary | Context clues | Determine the meaning of domain-specific words with pictures | An echidna is an example of a monotreme. | |
train/2770 | Which statement describes the Great Victoria Desert ecosystem? | [
"It has thick, moist soil.",
"It has only a few types of organisms.",
"It has a small amount of rain."
] | 2 | Figure: Great Victoria Desert.
The Great Victoria Desert is a hot desert ecosystem located in Western Australia and South Australia. It is the largest desert in Australia! The Great Victoria Desert is home to the rare great desert skink. To stay cool during the day, great desert skinks live in holes they dig in the gro... | 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 hot desert is a type of ecosystem. Hot deserts have the following features: a small amount of rain, dry, thin soil, and many different types of organisms. So, the following statement describes the Great Victoria Desert ecosystem: a small amount of rain, dry, thin soil, and many different types of organisms. It has a ... |
train/2771 | What is the capital of Alabama? | [
"Baton Rouge",
"Birmingham",
"Fairbanks",
"Montgomery"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Montgomery is the capital of Alabama. | ||
train/2772 | What is the capital of Oklahoma? | [
"Oklahoma City",
"Austin",
"Charleston",
"Tulsa"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Oklahoma City is the capital of Oklahoma. | ||
train/2773 | What is the name of the colony shown? | [
"Maryland",
"Pennsylvania",
"Florida",
"Connecticut"
] | 3 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Connecticut. | ||
train/2774 | Which term matches the picture? | [
"ruminant",
"monogastric"
] | 0 | Read the text.
Humans, like members of many other mammalian species, are monogastrics, which means that they have a single-chambered stomach. Some other mammalian species, though, are ruminants, which means that their stomachs have four chambers instead of one. Ruminants are perhaps most well-known for how much chewing... | closed choice | grade8 | language science | word-study | Domain-specific vocabulary | Determine the meaning of domain-specific words with pictures | A ruminant is an animal with a four-chambered stomach. This special digestive system allows cows to digest the grass that they graze on. | |
train/2775 | Which i in row A? | [
"the park",
"the library",
"the grocery store",
"the restaurant"
] | 2 | closed choice | grade2 | 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 grocery store is in row A. | |
train/2776 | Which animal is also adapted to be camouflaged in a sandy desert? | [
"thorny devil",
"leaf insect"
] | 0 | Horned vipers live in the deserts of Africa and the Middle East. The is adapted to be camouflaged in a sandy desert.
Figure: horned viper. | 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 horned viper.
The horned viper has sand-colored scales covering its body. It is adapted to be camouflaged in a sandy desert. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
The thorny devil has a yellow-and-brown body. It is ad... |
train/2777 | What is the capital of Texas? | [
"Richmond",
"Houston",
"Dallas",
"Austin"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Austin is the capital of Texas. | ||
train/2778 | Which of the following could Michael's test show? | [
"if the sample fabric would absorb one drop of water in less than one second",
"how long it would take the sample fabric to dry after it absorbed one drop of water",
"how much athletes would sweat in the fabric"
] | 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 | 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... | |
train/2779 | Which of these states is farthest south? | [
"Colorado",
"Iowa",
"Washington",
"North Dakota"
] | 0 | 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 south arrow is pointing. Colorado is farthest south. | |
train/2780 | Which bird's beak is also adapted to crack hard seeds? | [
"bronzy sunbird",
"hawfinch"
] | 1 | Northern cardinals eat small, hard seeds. The shape of the 's beak is adapted to crack open small, hard seeds.
Figure: northern cardinal. | 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 northern cardinal.
The northern cardinal has a short, thick beak. Its beak is adapted to crack hard seeds. The northern cardinal uses its short, thick beak to press down on a seed and crack open its hard shell.
Now look at each bird. Figure out which bird has a similar adaptation.
The hawfinc... |
train/2781 | Which property do these two objects have in common? | [
"smooth",
"rough"
] | 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 smooth object is not scratchy or rough. Neither of the objects are smooth.
A rough object feels scratchy when you touch it. Both objects are rough.
The property that both objects have in common is rough. |
train/2782 | 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"
] | 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 | grade8 | 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/2783 | Which continent is highlighted? | [
"Asia",
"Africa",
"Antarctica",
"South America"
] | 1 | closed choice | grade7 | social science | geography | Physical Geography | 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 Africa. | |
train/2784 | Which of these states is farthest west? | [
"Vermont",
"Connecticut",
"Alabama",
"New Mexico"
] | 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. New Mexico is farthest west. | |
train/2785 | Select the amphibian below. | [
"common toad",
"rabbit"
] | 0 | Amphibians have moist skin and begin their lives in water. A barking tree frog is an example of an amphibian. | 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 common toad is an amphibian. It has moist skin and begins its life in water.
Toads do not have teeth! They swallow their food whole.
A rabbit is a mammal. It has fur and feeds its young milk.
Rabbits live underground in burrows. A group of rabbit burrows is called a warren. |
train/2786 | What is the name of the colony shown? | [
"Florida",
"New Jersey",
"Indiana",
"Delaware"
] | 3 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/2787 | What is the capital of Ohio? | [
"Charleston",
"Columbus",
"Green Bay",
"Madison"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Columbus is the capital of Ohio. | ||
train/2788 | What is the capital of Texas? | [
"Austin",
"Lincoln",
"Jackson",
"Nampa"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Austin is the capital of Texas. | ||
train/2789 | Complete the sentence.
The mutation in the () affected the structure and function of the (). | [
"leptin receptor protein . . . OB-R gene",
"OB-R gene . . . leptin receptor protein"
] | 1 | The following passage describes the effects of a gene mutation, which is a permanent change in a gene. Read the passage and then follow the instructions below.
As in humans, hunger in mice depends on how much food a mouse has eaten. When a mouse eats, its hunger is controlled by the leptin receptor protein.
The leptin... | closed choice | grade6 | natural science | biology | Genes to traits | Describe the effects of gene mutations on organisms | An organism's genes contain information about its proteins. Each gene encodes, or contains the instructions for making, one protein or a group of proteins.
A permanent change in a gene is called a mutation. Because a mutation changes a gene, the mutation may change the structure of the protein encoded by that gene.
The... | A mutation in a gene may affect the protein it encodes.
So, the mutation in the OB-R gene affected the structure and function of the leptin receptor protein. |
train/2790 | Is aquamarine a mineral? | [
"yes",
"no"
] | 0 | Aquamarine has the following properties:
solid
naturally occurring
fixed crystal structure
pure substance
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... | Aquamarine has all the properties of a mineral. So, aquamarine is a mineral. |
train/2791 | Which of these states is farthest west? | [
"Tennessee",
"Minnesota",
"Nebraska",
"Ohio"
] | 2 | 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 west arrow is pointing. Nebraska is farthest west. | |
train/2792 | Is a bean a solid or a liquid? | [
"a liquid",
"a solid"
] | 1 | closed choice | grade2 | natural science | physics | States of matter | Classify matter as solid or liquid | Solid and liquid 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 shape of its own.
Some solids can be bent or broken easily. Others are hard to bend or break.
A glass cup is a solid. A sock is also a solid.
When matter is a li... | A bean is a solid. A solid has a size and shape of its own.
If you put many beans into a jar, the group of beans will take the shape of the jar, as a liquid would. But be careful! A bean is not a liquid. Each bean still has a size and shape of its own. | |
train/2793 | Select the organism in the same genus as the smooth newt. | [
"Lissotriton helveticus",
"Ambystoma mexicanum",
"Taricha torosa"
] | 0 | This organism is a smooth newt. Its scientific name is Lissotriton vulgaris. | 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 smooth newt's scientific name is Lissotriton vulgaris. The first word of its scientific name is Lissotriton.
Taricha torosa is in the genus Taricha. The first word of its scientific name is Taricha. So, Taricha torosa and Lissotriton vulgaris are not in the same genus.
Ambystoma mexicanum is in the genus Ambystoma. T... |
train/2794 | What is the capital of Mississippi? | [
"Oklahoma City",
"Atlanta",
"Jackson",
"Biloxi"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Jackson is the capital of Mississippi. | ||
train/2795 | Which property do these four objects have in common? | [
"stretchy",
"opaque",
"sour"
] | 1 | 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 stretchy object gets longer when you pull on it. The cracker is not stretchy.
An opaque object does not let light through. All four objects are opaque.
A lemon has a sour taste. The cracker is not sour.
The property that all four objects have in co... |
train/2796 | What is the probability that a Channel catfish produced by this cross will have a white body? | [
"2/4",
"0/4",
"1/4",
"4/4",
"3/4"
] | 3 | In a group of Channel catfish, some individuals have a brown body and others have a white body. In this group, the gene for the body color trait has two alleles. The allele for a brown body (B) is dominant over the allele for a white body (b).
This Punnett square shows a cross between two Channel catfish. | 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... | |
train/2797 | Which continent is highlighted? | [
"Africa",
"Europe",
"Asia",
"South America"
] | 2 | closed choice | grade8 | social science | geography | Physical Geography | 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 Asia. | |
train/2798 | Which property do these three objects have in common? | [
"sour",
"stretchy",
"blue"
] | 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 stretchy object gets longer when you pull on it. None of the objects are stretchy.
Blue is a color.
This color is blue. None of the objects are blue.
A lemon has a sour taste. All three objects are sour.
The property that all three objects have in ... |
train/2799 | Select the organism in the same genus as the Steller's sea eagle. | [
"Hyacinthus orientalis",
"Haliaeetus pelagicus",
"Alopias pelagicus"
] | 1 | This organism is a Steller's sea eagle. Its scientific name is Haliaeetus pelagicus. | 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 Steller's sea eagle's scientific name is Haliaeetus pelagicus. The first word of its scientific name is Haliaeetus.
This organism and the Steller's sea eagle are in the same genus and the same species! Both organisms have the same scientific name, Haliaeetus pelagicus.
Hyacinthus orientalis is in the genus Hyacinthus... |
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