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train/2600 | What is the capital of Iowa? | [
"Des Moines",
"Cedar Rapids",
"Davenport",
"Frankfort"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Des Moines is the capital of Iowa. | ||
train/2601 | Which of these states is farthest east? | [
"Louisiana",
"Utah",
"Alabama",
"California"
] | 2 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Alabama is farthest east. | |
train/2602 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 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 north pole of one magnet is closest to the south pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. |
train/2603 | Which of these states is farthest east? | [
"Michigan",
"South Carolina",
"Kentucky",
"Arizona"
] | 1 | 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 east arrow is pointing. South Carolina is farthest east. | |
train/2604 | Which of these oceans does the prime meridian intersect? | [
"the Indian Ocean",
"the Pacific Ocean",
"the Atlantic Ocean"
] | 2 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects the Atlantic Ocean. It does not intersect the Pacific Ocean or the Indian Ocean. | |
train/2605 | What is the capital of Oklahoma? | [
"Lansing",
"Saint Paul",
"Oklahoma City",
"Raleigh"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Oklahoma City is the capital of Oklahoma. | ||
train/2606 | Which solution has a higher concentration of blue particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each blue 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 blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/2607 | Which of these states is farthest east? | [
"Arizona",
"Texas",
"Oregon",
"Montana"
] | 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 east arrow is pointing. Texas is farthest east. | |
train/2608 | Is the following statement about our solar system true or false?
The volume of Neptune is less than 75% of the volume of Uranus. | [
"false",
"true"
] | 0 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | To determine if this statement is true, calculate the value of 75% of the volume of Uranus by multiplying its volume by 0.75.
Then compare the result to the volume of Neptune. The volume of Neptune is 62,530 billion km^3, which is more than 51,248 billion km^3. So, the volume of Neptune is more than 75% of the volume o... |
train/2609 | Based on the Venn diagram, who was a real person? | [
"Natty Bumppo",
"Daniel Boone"
] | 1 | This Venn diagram compares Natty Bumppo and Daniel Boone. | 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 compares Natty Bumppo and Daniel Boone.
The detail real-life pioneer appears in the Daniel Boone circle but not in the Natty Bumppo c... |
train/2610 | What is the name of the colony shown? | [
"South Carolina",
"Illinois",
"Maryland",
"North Carolina"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is South Carolina. | ||
train/2611 | What is the name of the colony shown? | [
"Delaware",
"Mississippi",
"Pennsylvania",
"New York"
] | 2 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Pennsylvania. | ||
train/2612 | Is the following statement about our solar system true or false?
The volume of Uranus is less than one-tenth of the volume of Saturn. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | To determine if this statement is true, calculate the value of one-tenth the volume of Saturn.
Then compare the result to the volume of Uranus. The volume of Uranus is 68,300 billion km^3, which is less than 82,713 billion km^3. So, the volume of Uranus is less than one-tenth the volume of Saturn. |
train/2613 | Is Asimina triloba made up of many cells? | [
"yes",
"no"
] | 0 | 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 | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | Asimina triloba is a plant. Plants are made up of many cells. | |
train/2614 | What is the capital of Alaska? | [
"Huntington",
"Anchorage",
"Bismarck",
"Juneau"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/2615 | Which of these continents does the prime meridian intersect? | [
"South America",
"Antarctica",
"North America"
] | 1 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects Antarctica. It does not intersect South America or North America. | |
train/2616 | Which of the following organisms is the secondary consumer in this food web? | [
"rough-legged hawk",
"grizzly bear",
"brown lemming"
] | 1 | Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade6 | 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... | Secondary consumers eat primary consumers, and primary consumers eat producers. So, in a food web, secondary consumers have arrows pointing to them from primary consumers. Primary consumers have arrows pointing to them from producers.
The grizzly bear has an arrow pointing to it from the barren-ground caribou. The barr... |
train/2617 | Complete the sentence.
The mutation in the () affected the structure and function of the (). | [
"PCSK9 protein . . . PCSK9 gene",
"PCSK9 gene . . . PCSK9 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.
Cholesterol (koh-LES-ter-ol) is a fat-like substance that has many functions in the body. Cholesterol moves through the body in the blood. The amount of choles... | 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 PCSK9 gene affected the structure and function of the PCSK9 protein. |
train/2618 | Which country is highlighted? | [
"Trinidad and Tobago",
"The Bahamas",
"Dominica",
"Grenada"
] | 0 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Trinidad and Tobago. | ||
train/2619 | Is a hair clip 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 hair clip is a solid. A solid has a size and shape of its own.
You can use a hair clip to keep your hair out of your face because the hair clip keeps its shape. | |
train/2620 | What is the capital of North Carolina? | [
"Tallahassee",
"Raleigh",
"Oklahoma City",
"Charlotte"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Raleigh is the capital of North Carolina. | ||
train/2621 | Which country is highlighted? | [
"Saint Lucia",
"Saint Vincent and the Grenadines",
"Barbados",
"Grenada"
] | 1 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Vincent and the Grenadines. | ||
train/2622 | Which property do these two objects have in common? | [
"slippery",
"scratchy"
] | 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 scratchy object is rough and itchy against your skin. Neither of the objects are scratchy.
A slippery object is hard to hold onto or stand on. Both objects are slippery.
The property that both objects have in common is slippery. |
train/2623 | Which of these organisms contains matter that was once part of the bilberry? | [
"lichen",
"bear sedge",
"brown lemming"
] | 2 | Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade7 | 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 that starts from the bilberry.
The lichen does not have any arrows pointing to it. So, in this food web, matter does not move from the bilberry to the lichen.There is one path matter can take from the b... |
train/2624 | What is the name of the colony shown? | [
"Kentucky",
"Pennsylvania",
"Maryland",
"Delaware"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/2625 | Which better describes the De Biesbosch National Park ecosystem? | [
"It has soil that is rich in nutrients. It also has other water ecosystems nearby.",
"It has soil that is poor in nutrients. It also has other water ecosystems nearby."
] | 0 | Figure: De Biesbosch National Park.
De Biesbosch National Park is a wetland ecosystem in the Netherlands. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A wetland is a type of ecosystem. Wetlands have the following features: land that is covered with water during most of the year, soil that is rich in nutrients, and other water ecosystems nearby. So, De Biesbosch National Park has soil that is rich in nutrients. It also has other water ecosystems nearby. |
train/2626 | Which of these states is farthest north? | [
"Virginia",
"Colorado",
"Oregon",
"Ohio"
] | 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 north arrow is pointing. Oregon is farthest north. | |
train/2627 | Which of these cities is marked on the map? | [
"New York City",
"Detroit",
"Philadelphia",
"New Orleans"
] | 1 | closed choice | grade5 | social science | geography | Cities | Major U.S. cities | The city is Detroit, Michigan. New York City, New Orleans, and Philadelphia are marked with gray circles on the map below. | ||
train/2628 | Select the organism in the same genus as the barn owl. | [
"Acanthaster planci",
"Tyto alba",
"Ardea alba"
] | 1 | This organism is a barn owl. Its scientific name is Tyto alba. | 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 barn owl's scientific name is Tyto alba. The first word of its scientific name is Tyto.
Ardea alba and Tyto alba are not in the same genus.
These organisms are not in the same genus, but part of their scientific names is the same. Ardea alba and Tyto alba have the same species name within their genus, alba. But the f... |
train/2629 | Is the following statement about our solar system true or false?
Of the four largest planets, three are made mainly of gas. | [
"false",
"true"
] | 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. | The table tells you that the four largest planets are Jupiter, Saturn, Uranus, and Neptune. Jupiter and Saturn are made mainly of gas. Uranus and Neptune are made mainly of ice. So, of the four largest planets, two are made mainly of gas. |
train/2630 | What is the capital of Illinois? | [
"Springfield",
"Saint Paul",
"Cleveland",
"Topeka"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Springfield is the capital of Illinois. | ||
train/2631 | Which solution has a higher concentration of purple particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each purple 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 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/2632 | What is the capital of Alaska? | [
"Anchorage",
"Salt Lake City",
"Juneau",
"Cheyenne"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/2633 | 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 the same in both pairs.",
"The magnitude of the magnetic force is smaller 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, but some of them are different shapes. | 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,... | Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magnitude of the magnetic force between them is smaller.
There is a greater distance between the magnets in Pair 2 than in Pair 1. So, the magnitude of the magnetic force is smaller in Pair 2 than in Pair 1. |
train/2634 | Select the organism in the same genus as the gray heron. | [
"Chroicocephalus novaehollandiae",
"Ardea herodias",
"Hyla cinerea"
] | 1 | This organism is a gray heron. Its scientific name is Ardea cinerea. | 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 gray heron's scientific name is Ardea cinerea. The first word of its scientific name is Ardea.
Chroicocephalus novaehollandiae is in the genus Chroicocephalus. The first word of its scientific name is Chroicocephalus. So, Chroicocephalus novaehollandiae and Ardea cinerea are not in the same genus.
Ardea herodias is i... |
train/2635 | Complete the statement.
Cobalt is (). | [
"an elementary substance",
"a compound"
] | 0 | The model below represents cobalt. balt is a metal found in substances that make paint blue. | 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 cobalt is an elementary substance or a compound.
Step 1: Interpret the model.
In the space-filling model shown above, all of the balls are the same color:
. The legend shows that dark blue represents the chemical element with the atomic symbol Co. So, the model shows you that cobalt i... |
train/2636 | Which of the following could Jill's test show? | [
"whether she added enough nutrients to help the bacteria produce 20% more insulin",
"whether producing more insulin would help the bacteria grow faster",
"whether different types of bacteria would need different nutrients to produce insulin"
] | 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 | 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/2637 | What is the name of the colony shown? | [
"Ohio",
"South Carolina",
"Delaware",
"New Jersey"
] | 3 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is New Jersey. | ||
train/2638 | What is the capital of Iowa? | [
"Lincoln",
"Des Moines",
"Cedar Rapids",
"Davenport"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Des Moines is the capital of Iowa. | ||
train/2639 | Based on the time line, how many years passed between the publication of The Voyage of the Dawn Treader and The Magician's Nephew? | [
"one year",
"three years"
] | 1 | This time line shows the publication dates of the books in The Chronicles of Narnia by C. S. Lewis. | closed choice | grade6 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | A time line shows the order of events by placing them along a line. This time line shows the publication dates of the books in The Chronicles of Narnia by C. S. Lewis.
Look at the years given in the time line. The Voyage of the Dawn Treader was published in 1952. The Magician's Nephew was published in 1955. So, three y... |
train/2640 | Which of the following was a dependent variable in this experiment? | [
"the type of bed rail",
"the number of patients who got new infections"
] | 1 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Many types of bacteria cannot survive on objects made of copper. Dr. Bennett was considering using beds with copper bed rails instead of beds with plastic rails at the hospital where she worked. She wanted to ... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify independent and dependent variables | Experiments have variables, or parts that change. You can design an experiment to find out how one variable affects another variable. For example, imagine that you want to find out if fertilizer affects the number of tomatoes a tomato plant grows. To answer this question, you decide to set up two equal groups of tomato... | |
train/2641 | What is the capital of Wyoming? | [
"Laramie",
"Saint Paul",
"Baton Rouge",
"Cheyenne"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/2642 | What is the capital of Kansas? | [
"Wichita",
"Kansas City",
"Des Moines",
"Topeka"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Topeka is the capital of Kansas. | ||
train/2643 | Which animal's skin is also adapted for survival in cold places? | [
"naked mole rat",
"polar bear"
] | 1 | Snowy owls live in the cold, snowy plains of the Arctic. The 's skin is adapted to help the animal survive in cold places.
Figure: snowy owl. | 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 snowy owl.
The snowy owl has a thick coat of feathers covering its skin. Its skin is adapted for survival in cold places. The snowy owl uses its feathers to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
The polar bear has skin with thick... |
train/2644 | Which better describes the Death Valley ecosystem? | [
"It has a small amount of rain. It also has many different types of organisms.",
"It has a small amount of rain. It also has only a few types of organisms."
] | 0 | Figure: Death Valley.
Death Valley is a desert ecosystem in eastern California. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A desert is a type of ecosystem. Deserts have the following features: a small amount of rain, dry, thin soil, and many different types of organisms. So, Death Valley has a small amount of rain. It also has many different types of organisms. |
train/2645 | What can Rodrigo and Kathleen trade to each get what they want? | [
"Kathleen can trade her broccoli for Rodrigo's oranges.",
"Rodrigo can trade his tomatoes for Kathleen's broccoli.",
"Kathleen can trade her almonds for Rodrigo's tomatoes.",
"Rodrigo can trade his tomatoes for Kathleen'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.
Rodrigo and Kathleen open their lunch boxes in the school cafeteria. Neither Rodrigo nor Kathleen got everything that they wanted... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Rodrigo wants broccoli. Kathleen 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/2646 | Which continent is highlighted? | [
"Australia",
"Africa",
"North America",
"South America"
] | 1 | closed choice | grade3 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Africa. | |
train/2647 | Which is this organism's common name? | [
"luna moth",
"Actias luna"
] | 0 | This organism is Actias luna. It is also called a luna moth. | closed choice | grade7 | 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,... | Actias luna is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Actias luna is the organism's scientific name. So, you know that luna moth is the common name. |
train/2648 | Which type of relationship is formed when a woolly bat roosts in a tropical pitcher plant's trap? | [
"commensal",
"parasitic",
"mutualistic"
] | 2 | Read the passage. Then answer the question.
Tropical pitcher plants live in soil that is poor in nutrients. To get the nutrients it needs to survive, the plant uses a pitcher-shaped leaf as a trap to catch and digest small organisms. But the plant can also get nutrients from other sources, including from the feces of ... | closed choice | grade7 | natural science | biology | Ecological interactions | Classify symbiotic relationships | When two organisms of different species interact in a way that affects one or both organisms, they form a symbiotic relationship. The word symbiosis comes from a Greek word that means living together. Scientists define types of symbiotic relationships based on how each organism is affected.
This table lists three commo... | When a woolly bat roosts in a tropical pitcher plant's trap, the bat can hide from predators and bad weather. So, the bat benefits from its relationship with the plant.
The plant absorbs nutrients from the bat's feces. So, the plant also benefits from its relationship with the bat.
Since both the bat and the plant bene... |
train/2649 | Is quartz a mineral? | [
"yes",
"no"
] | 0 | Quartz has the following properties:
solid
not made by living things
fixed crystal structure
made of a pure substance called silica
found in nature | 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... | Quartz has all the properties of a mineral. So, quartz is a mineral. |
train/2650 | What is the capital of Delaware? | [
"Annapolis",
"Georgetown",
"Harrisburg",
"Dover"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/2651 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Nicaragua.
Winds are called offshore when they blow from land to water. Offshore winds blew on the west coast of Nicaragua last week. Most people prefer to surf on days when the winds are offshore.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a ... | 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.
Winds are called offshore when they blow from land to water. Offshore winds blew on the west coast of Nicaragua last week. Most people prefer to surf on days when the winds are offshore.
The underlined part of the passage tells you about the wind direction on the west coast of Nicaragua last... |
train/2652 | Which is this organism's common name? | [
"black howler",
"Alouatta caraya"
] | 0 | This organism is a black howler. It is also called Alouatta caraya. | closed choice | grade7 | 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,... | Alouatta caraya is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Alouatta caraya is the organism's scientific name. So, you know that black howler is the common name. |
train/2653 | Is the following statement about our solar system true or false?
Three-quarters of the planets are larger than Venus. | [
"true",
"false"
] | 1 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that there are five planets larger than Venus: Earth, Jupiter, Saturn, Uranus, and Neptune. There are eight planets total. Five-eighths is less than three-quarters. So, five-eighths of the planets are larger than Venus. |
train/2654 | What is the probability that a fruit fly produced by this cross will have red eyes? | [
"4/4",
"0/4",
"2/4",
"1/4",
"3/4"
] | 0 | In a group of fruit flies, some individuals have red eyes and others have brown eyes. In this group, the gene for the eye color trait has two alleles. The allele for red eyes (E) is dominant over the allele for brown eyes (e).
This Punnett square shows a cross between two fruit flies. | 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/2655 | Which property matches this object? | [
"sweet",
"stretchy"
] | 0 | Select the better answer. | closed choice | grade3 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. | Look at the object.
Think about each property.
A stretchy object gets longer when you pull on it. The candy sprinkles are not stretchy.
Sugar has a sweet taste. The candy sprinkles are sweet. |
train/2656 | What is the capital of Arizona? | [
"Santa Fe",
"Tucson",
"Sioux Falls",
"Phoenix"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Phoenix is the capital of Arizona. | ||
train/2657 | Which animal's legs are also adapted for wading? | [
"hammerkop",
"magnificent frigatebird"
] | 0 | s live in the marshes of Europe and Asia. They eat insects, snails, and worms that live in shallow water. Spoonbills often hunt their prey by walking through water, or wading.
The spoonbill's legs are adapted for wading. They are lightweight and keep the bird's body above the water.
Figure: Eurasian spoonbill. | 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.
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 Eurasian spoonbill.
Long legs help the Eurasian spoonbill keep its body above the surface of the water while wading. Thin legs are easier to move through the water.
Now look at each animal. Figure out which animal has a similar adaptation.
The hammerkop has long, thin legs. Its legs are adapt... |
train/2658 | Select the organism in the same species as the common kestrel. | [
"Ardea cinerea",
"Ardea alba",
"Falco tinnunculus"
] | 2 | This organism is a common kestrel. Its scientific name is Falco tinnunculus. | 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 common kestrel's scientific name is Falco tinnunculus.
Falco tinnunculus has the same scientific name as a common kestrel. So, these organisms are in the same species.
Ardea cinerea does not have the same scientific name as a common kestrel. So, Falco tinnunculus and Ardea cinerea are not in the same species.
Ardea a... |
train/2659 | Is a scarf a solid, a liquid, or a gas? | [
"a liquid",
"a solid",
"a gas"
] | 1 | 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 scarf is a solid. You can fold a scarf. But it will still have a size and shape of its own. | |
train/2660 | Which country is highlighted? | [
"the Federated States of Micronesia",
"Papua New Guinea",
"Palau",
"the Marshall Islands"
] | 0 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is the Federated States of Micronesia. | ||
train/2661 | Is the following statement about our solar system true or false?
The volume of Uranus is less than one-tenth of the volume of Saturn. | [
"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 one-tenth the volume of Saturn.
Then compare the result to the volume of Uranus. The volume of Uranus is 68,300 billion km^3, which is less than 82,713 billion km^3. So, the volume of Uranus is less than one-tenth the volume of Saturn. |
train/2662 | Which of these states is farthest east? | [
"North Dakota",
"Utah",
"Kansas",
"Michigan"
] | 3 | 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 east arrow is pointing. Michigan is farthest east. | |
train/2663 | Which country is highlighted? | [
"Haiti",
"Dominica",
"Saint Vincent and the Grenadines",
"the Dominican Republic"
] | 1 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Dominica. | ||
train/2664 | Which of these oceans does the prime meridian intersect? | [
"the Arctic Ocean",
"the Indian Ocean",
"the Pacific Ocean"
] | 0 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects the Arctic Ocean. It does not intersect the Indian Ocean or the Pacific Ocean. | |
train/2665 | What is the expected ratio of offspring with a black body to offspring with a gray body? Choose the most likely ratio. | [
"1:3",
"3:1",
"4:0",
"0:4",
"2:2"
] | 3 | In a group of fruit flies, some individuals have a gray body and others have a black body. In this group, the gene for the body color trait has two alleles. The allele for a gray body (B) is dominant over the allele for a black body (b).
This Punnett square shows a cross between two fruit flies. | 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 a black body or a gray body, consider whether each phenotype is the dominant or recessive allele's version of the body color trait. The question tells you that the B allele, which is for a gray body, is dominant over the b allele, which is for a... |
train/2666 | Which of these states is farthest north? | [
"Maryland",
"New Jersey",
"Connecticut",
"Arizona"
] | 2 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Connecticut is farthest north. | |
train/2667 | Which is the main persuasive appeal used in this ad? | [
"pathos (emotion)",
"logos (reason)",
"ethos (character)"
] | 0 | closed choice | grade8 | 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 pathos, or emotion. It links the product to freedom from embarrassment. | |
train/2668 | Which property matches this object? | [
"blue",
"soft"
] | 1 | Select the better answer. | closed choice | grade3 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. | Look at the object.
Think about each property.
A soft object changes shape when pressed or squeezed. The melted marshmallow is soft.
Blue is a color.
This color is blue. The melted marshmallow is not blue. |
train/2669 | Which animal's skin is also adapted for survival in cold places? | [
"Amazon milk frog",
"Eurasian lynx"
] | 1 | Snowy owls live in the cold, snowy plains of the Arctic. The 's skin is adapted to help the animal survive in cold places.
Figure: snowy owl. | closed choice | grade3 | 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 snowy owl.
The snowy owl has a thick coat of feathers covering its skin. Its skin is adapted for survival in cold places. The snowy owl uses its feathers to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
During the winter, the Eurasian ly... |
train/2670 | What can Bernard and Troy trade to each get what they want? | [
"Troy can trade his broccoli for Bernard's oranges.",
"Troy can trade his almonds for Bernard's tomatoes.",
"Bernard can trade his tomatoes for Troy's broccoli.",
"Bernard can trade his tomatoes for Troy's sandwich."
] | 2 | 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.
Bernard and Troy open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Bernard wanted... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Bernard wanted broccoli in his lunch and Troy was hoping for tomatoes. Look at the labeled part of the images.
Bernard has tomatoes. Troy 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/2671 | Which material is this swimsuit made of? | [
"plastic",
"polyester"
] | 1 | 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 swimsuit.
The swimsuit 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/2672 | Which of these states is farthest south? | [
"Rhode Island",
"North Dakota",
"Arizona",
"Virginia"
] | 2 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the south arrow is pointing. Arizona is farthest south. | |
train/2673 | Select the organism in the same species as the Indian rock python. | [
"Python bivittatus",
"Python molurus",
"Melanoplus bivittatus"
] | 1 | This organism is an Indian rock python. Its scientific name is Python molurus. | 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... | An Indian rock python's scientific name is Python molurus.
Python molurus is in the same genus as Python bivittatus, but they are not in the same species.
Organisms in the same species have the same scientific names. Python molurus and Python bivittatus are different species within the same genus.
Python molurus has th... |
train/2674 | Which of these continents does the prime meridian intersect? | [
"Asia",
"North America",
"Africa"
] | 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 Africa. It does not intersect North America or Asia. | |
train/2675 | 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 the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | 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,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The larger the magnets, the greater the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is larger in Pair 2 than in Pair 1. So, the magnitud... |
train/2676 | Which property do these two objects have in common? | [
"blue",
"bouncy"
] | 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.
Blue is a color.
This color is blue. Neither of the objects are blue.
A bouncy object will bounce back from the floor if you drop it. Both objects are bouncy.
The property that both objects have in common is bouncy. |
train/2677 | Which of these continents does the prime meridian intersect? | [
"South America",
"Asia",
"Africa"
] | 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 Africa. It does not intersect South America or Asia. | |
train/2678 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample A",
"sample B"
] | 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... | Each particle in the two samples has the same mass, but the particles in sample B have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sampl... |
train/2679 | Which property matches this object? | [
"sweet",
"salty"
] | 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.
Sugar has a sweet taste. The chocolate syrup is sweet.
Potato chips have a salty taste. The chocolate syrup is not salty. |
train/2680 | Which of these states is farthest north? | [
"Iowa",
"Florida",
"South Carolina",
"Virginia"
] | 0 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Iowa is farthest north. | |
train/2681 | Select the bird below. | [
"ostrich",
"Mojave rattlesnake"
] | 0 | Birds have feathers, two wings, and a beak. A bald eagle is an example of a bird. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | An ostrich is a bird. It has feathers, two wings, and a beak.
A Mojave rattlesnake is a reptile. It has scaly, waterproof skin. |
train/2682 | What is the capital of Colorado? | [
"Hartford",
"Little Rock",
"Boulder",
"Denver"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Denver is the capital of Colorado. | ||
train/2683 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 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 north pole of one magnet is closest to the south pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. |
train/2684 | Which of the following could Owen's test show? | [
"if at least 20% of the park would be shaded by trees in each design",
"which design would have the least traffic noise in the concert area",
"which design would have the greatest distance between the concert area and the road"
] | 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/2685 | Which of the following statements describess living in an independent city-state? | [
"My city rules itself and is not part of a larger country.",
"All the decisions about my city are made by a faraway emperor.",
"I live by myself in the wilderness.",
"I vote for a president that rules over many different cities."
] | 0 | Athens was one of the most powerful independent city-states in ancient Greece. Look at the definitions below. Then answer the question. | closed choice | grade6 | social science | world-history | Greece | Classical Athens: geography and society | Look at the definitions.
Putting the definitions together, an independent city-state is a self-ruling city with its own government. So, a city-state rules itself and is not part of a larger country.
The ancient Greeks called a city-state a polis, which was the ancient Greek word for city. Today, the root word "polis" i... | |
train/2686 | Which animal is also adapted to be camouflaged in a sandy desert? | [
"fennec fox",
"Amazon milk frog"
] | 0 | Thorny devils are lizards that live in the deserts of Australia. The is adapted to be camouflaged in a sandy desert.
Figure: thorny devil. | closed choice | grade3 | 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 thorny devil.
The thorny devil has a yellow-and-brown 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 fennec fox has sand-colored fur covering its skin. It is adapted... |
train/2687 | Which solution has a higher concentration of blue particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each blue 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 blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/2688 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"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 | grade7 | 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/2689 | Which property do these four objects have in common? | [
"fragile",
"sticky",
"hard"
] | 2 | 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 ceramic mug is fragile, but the shield is not.
A sticky object can attach or stick to other things. The rainbow sucker and the ice pop are sticky, but the shield is not.
A hard object does n... |
train/2690 | Which property do these three objects have in common? | [
"stretchy",
"scratchy",
"hard"
] | 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 hard object does not change shape when pressed or squeezed. None of the objects are hard.
A stretchy object gets longer when you pull on it. All three objects are stretchy.
A scratchy object is rough and itchy against your skin. The rubber band and... |
train/2691 | Which animal's skin is better adapted as a warning sign to ward off predators? | [
"peppered moth",
"blue poison dart frog"
] | 1 | Flamboyant cuttlefish are poisonous animals with brightly colored skin. The bright colors serve as a warning sign that the animal is poisonous. The 's skin is adapted to ward off predators.
Figure: flamboyant cuttlefish. | closed choice | grade3 | 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 flamboyant cuttlefish.
The flamboyant cuttlefish has a poisonous body with brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the flamboyant cuttlefish is poisonous.
Now look at each animal. Figure out which animal has a similar ad... |
train/2692 | Select the fish below. | [
"piranha",
"zebra"
] | 0 | Fish live underwater. They have fins, not limbs. A manta ray is an example of a fish. | 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 piranha is a fish. It lives underwater. It has fins, not limbs.
A zebra is a mammal. It has hair and feeds its young milk. |
train/2693 | Which property do these four objects have in common? | [
"fragile",
"translucent",
"hard"
] | 2 | 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 icicle and the water pitcher are fragile, but the brick wall and the building blocks are not.
A translucent object lets light through. But you cannot see clearly through a translucent object... |
train/2694 | Which material is this clothespin made of? | [
"porcelain",
"metal"
] | 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 clothespin.
The clothespin is made of two different materials. The body is made of wood, and the spring is made of metal. | |
train/2695 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 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 north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/2696 | Which continent is highlighted? | [
"South America",
"Europe",
"North America"
] | 2 | closed choice | grade2 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is North America. | |
train/2697 | Which country is highlighted? | [
"Saint Kitts and Nevis",
"Barbados",
"Dominica",
"Antigua and Barbuda"
] | 3 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Antigua and Barbuda. | ||
train/2698 | Which country is highlighted? | [
"Tonga",
"the Marshall Islands",
"Vanuatu",
"Tuvalu"
] | 0 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Tonga. | ||
train/2699 | 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"
] | 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 | grade7 | 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... |
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