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train/1600 | What can Gordon and Roxanne trade to each get what they want? | [
"Gordon can trade his tomatoes for Roxanne's sandwich.",
"Gordon can trade his tomatoes for Roxanne's broccoli.",
"Roxanne can trade her almonds for Gordon's tomatoes.",
"Roxanne can trade her broccoli for Gordon's oranges."
] | 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.
Gordon and Roxanne open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Gordon wante... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Gordon wanted broccoli in his lunch and Roxanne was hoping for tomatoes. Look at the labeled part of the images.
Gordon has tomatoes. Roxanne 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/1601 | Is a hair clip a solid, a liquid, or a gas? | [
"a solid",
"a gas",
"a liquid"
] | 0 | closed choice | grade2 | 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 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 i... | 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/1602 | Which continent is highlighted? | [
"Asia",
"Australia",
"Africa",
"North America"
] | 0 | closed choice | grade4 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Asia. | |
train/1603 | During this time, thermal energy was transferred from () to (). | [
"each vial . . . the surroundings",
"the surroundings . . . each vial"
] | 1 | 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/1604 | Which country is highlighted? | [
"Cuba",
"Saint Vincent and the Grenadines",
"Grenada",
"Trinidad and Tobago"
] | 3 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Trinidad and Tobago. | ||
train/1605 | Which animal's skin is also adapted for survival in cold places? | [
"hairy armadillo",
"caribou"
] | 1 | Arctic wolves live in the Canadian Arctic and Greenland. The 's skin is adapted to help the animal survive in cold places.
Figure: Arctic wolf. | 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 Arctic wolf.
The Arctic wolf has thick fur covering its skin. Its skin is adapted for survival in cold places. The Arctic wolf uses its fur to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
During the winter, the caribou has thick fur cov... |
train/1606 | 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 | 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/1607 | Which animal is also adapted to use its neck to appear large and scary to a predator? | [
"sand lizard",
"frillneck lizard"
] | 1 | s are snakes. Their predators include mongooses and secretary birds. The cobra uses its neck to appear large and scary to a predator.
Figure: Mozambique spitting cobra. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's neck is one example of an adaptation. Animals' necks can be adapted in different ways. For example, a large frilled neck might help an animal appear dangerous ... | Look at the picture of the Mozambique spitting cobra.
When frightened, the Mozambique spitting cobra can spread out its hood to appear larger and more dangerous. If a predator is nearby, the hood can help scare it away.
Now look at each animal. Figure out which animal has a similar adaptation.
The frillneck lizard has ... |
train/1608 | Complete the statement.
Ammonia is (). | [
"an elementary substance",
"a compound"
] | 1 | The model below represents a molecule of ammonia. Most of the ammonia produced every year is used by farmers to help crops grow. | closed choice | grade7 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | Use the model to determine whether ammonia 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 chemical el... |
train/1609 | Is the following statement about our solar system true or false?
The largest planet is made mainly of ice. | [
"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 planet is the largest, look at the volumes shown in the table and compare the exponents. Jupiter's volume has an exponent of 15, which is the largest out of all the planets.
Jupiter is made mainly of gas. So, the largest planet is made mainly of gas. |
train/1610 | Based on the timeline, which statement is true? | [
"The First Continental Congress met to place new taxes on the Thirteen Colonies.",
"No colonists were killed by British soldiers before the American Revolution.",
"The French and Indian War ended before the Stamp Act was passed."
] | 2 | After the French and Indian War ended in 1763, the relationship between the Thirteen Colonies and Great Britain began to change.
The timeline below shows some of the events that took place before the Revolutionary War broke out in 1775. Look at the timeline. Then answer the question below. | closed choice | grade8 | social science | us-history | The American Revolution | Causes of the American Revolution: politics and society | ||
train/1611 | Select the organism in the same genus as the barn owl. | [
"Sciurus vulgaris",
"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.
This organism and the barn owl are in the same genus and the same species! Both organisms have the same scientific name, Tyto alba.
Sciurus vulgaris is in the genus Sciurus. The first word of its scientific name is Sciurus. So, Sc... |
train/1612 | Complete the statement.
Water is (). | [
"an elementary substance",
"a compound"
] | 1 | The model below represents a molecule of water. Over 98% of the molecules in your body are water molecules. | closed choice | grade7 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | Use the model to determine whether water 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 chemical elem... |
train/1613 | Which type of force from the traveler rolls the suitcase along? | [
"pull",
"push"
] | 0 | A traveler rolls his suitcase along behind him. He applies a force to the suitcase as he walks. | closed choice | grade3 | natural science | physics | Force and motion | Identify pushes and pulls | A force is a push or a pull that one object applies to a second object.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The traveler applies a force to the suitcase. This force rolls the suitcase along. The direction of this force is toward the traveler. This force is a pull. |
train/1614 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"neither; the samples have the same temperature"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | 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 B has more mass than each particle in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sample B mus... |
train/1615 | Select the organism in the same species as the great blue heron. | [
"Ardea herodias",
"Pelecanus rufescens",
"Falco peregrinus"
] | 0 | This organism is a great blue heron. Its scientific name is Ardea herodias. | 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 great blue heron's scientific name is Ardea herodias.
Pelecanus rufescens does not have the same scientific name as a great blue heron. So, Ardea herodias and Pelecanus rufescens are not in the same species.
Falco peregrinus does not have the same scientific name as a great blue heron. So, Ardea herodias and Falco pe... |
train/1616 | Which part of the almond tree do we usually eat? | [
"the leaves",
"the seeds",
"the root"
] | 1 | People use almond trees for food. We usually eat the part of this plant that can grow into a new plant. | closed choice | grade4 | natural science | biology | Plants | Classify fruits and vegetables as plant parts | The fruits and vegetables we eat are parts of plants! Plants are made up of different structures. The different structures carry out important functions.
The roots take in water and nutrients from the soil. They also hold the plant in place in the soil.
The stem supports the plant. It carries food, water, and nutrients... | The part of the almond tree we usually eat is the seeds. They can grow into a new plant. |
train/1617 | What is the capital of Iowa? | [
"Davenport",
"Bismarck",
"Cedar Rapids",
"Des Moines"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Des Moines is the capital of Iowa. | ||
train/1618 | Which of these states is farthest north? | [
"Florida",
"Tennessee",
"Delaware",
"South Carolina"
] | 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. Delaware is farthest north. | |
train/1619 | Which property do these two objects have in common? | [
"soft",
"stretchy"
] | 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 soft object changes shape when you squeeze it. Both objects are soft.
A stretchy object gets longer when you pull on it. The feather is not stretchy.
The property that both objects have in common is soft. |
train/1620 | Which property do these two objects have in common? | [
"sticky",
"stretchy"
] | 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 stretchy object gets longer when you pull on it. Both objects are stretchy.
A sticky object can stick to other things. Neither of the objects are sticky.
The property that both objects have in common is stretchy. |
train/1621 | What is the capital of Washington? | [
"Helena",
"Providence",
"Spokane",
"Olympia"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Olympia is the capital of Washington. | ||
train/1622 | Which of these states is farthest east? | [
"Nebraska",
"Tennessee",
"Oklahoma",
"South Carolina"
] | 3 | 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. South Carolina is farthest east. | |
train/1623 | Which is this organism's scientific name? | [
"Steller's sea eagle",
"Haliaeetus pelagicus"
] | 1 | This organism is Haliaeetus pelagicus. It is also called a Steller's sea eagle. | 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,... | Haliaeetus pelagicus is written in italics. The first word is capitalized, and the second word is not.
So, Haliaeetus pelagicus is the scientific name. |
train/1624 | Complete the sentence.
The Great Himalayas formed at a () boundary. | [
"convergent",
"transform",
"divergent"
] | 0 | Read the passage and look at the picture.
The Great Himalayas are a mountain range that stretches across northern India, Nepal, and neighboring countries. The mountain range began to form 40 to 50 million years ago as the Indo-Australian Plate collided with the Eurasian Plate. Because the plates are still colliding, th... | closed choice | grade8 | natural science | earth-science | Plate tectonics | Describe tectonic plate boundaries around the world | The outer layer of Earth is broken up into many pieces called tectonic plates, or simply plates. The breaks between plates are called plate boundaries. Plate boundaries are classified by the way the plates are moving relative to each other:
At a divergent boundary, two plates are moving away from each other.
At a trans... | To figure out what type of plate boundary formed the Great Himalayas, you need to know how the tectonic plates interacted. To find this out, read the passage carefully.
The Great Himalayas are a mountain range that stretches across northern India, Nepal, and neighboring countries. The mountain range began to form 40 to... |
train/1625 | Which of the following could Alice and Maddie's test show? | [
"if the concrete from each batch took the same amount of time to dry",
"if a new batch of concrete was firm enough to use"
] | 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 | grade6 | 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/1626 | Select the fish below. | [
"robin",
"bull shark"
] | 1 | Fish live underwater. They have fins, not limbs. A piranha is an example of a fish. | closed choice | grade3 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A 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.
A robin is a bird. It has feathers, two wings, and a beak.
A robin is a songbird. It sings different songs at different times of the day. |
train/1627 | Which statement is true about the average monthly precipitation in Nairobi? | [
"More precipitation falls in September than in November.",
"More precipitation falls in April than in August.",
"February is the wettest month of the year."
] | 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 Nairobi, look at the graph.
Choice "Feb" is incorrect.
Choice "Apr" is incorrect.
Choice "Aug" is incorrect.
Choice "Sep" is incorrect.
Choice "Nov" is incorrect.
Choice "More precipitation falls in April than in August." is incorrect.
April has a higher average monthly p... |
train/1628 | What is the capital of New York? | [
"Juneau",
"Jackson",
"Albany",
"Montpelier"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Albany is the capital of New York. | ||
train/1629 | Which property do these three objects have in common? | [
"salty",
"opaque",
"soft"
] | 2 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
Potato chips have a salty taste. The jello is not salty.
An opaque object does not let light through. The ball of wet clay is opaque, but the jello is not.
A soft object changes shape when pressed or squeezed. All three objects are soft.
The property... |
train/1630 | What is the capital of Michigan? | [
"Frankfort",
"Lansing",
"Burlington",
"Grand Rapids"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Lansing is the capital of Michigan. | ||
train/1631 | Which animal's skin is also adapted for survival in cold places? | [
"fantastic leaf-tailed gecko",
"caribou"
] | 1 | Musk oxen live in the Canadian Arctic and Greenland. The 's skin is adapted to help the animal survive in cold places.
Figure: musk ox. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the musk ox.
The musk ox has skin with thick fur on top and a thick layer of fat underneath it. Its skin is adapted for survival in cold places. The musk ox uses its fur and fat to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
During the win... |
train/1632 | What is the name of the colony shown? | [
"Wisconsin",
"Tennessee",
"Connecticut",
"New Jersey"
] | 2 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Connecticut. | ||
train/1633 | What is the capital of Utah? | [
"Denver",
"Provo",
"Phoenix",
"Salt Lake City"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | ||
train/1634 | Is the following statement about our solar system true or false?
The smallest planet is made mainly of rock. | [
"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. | The table tells you that the smallest planet is Mercury and that Mercury is made mainly of rock. So, the smallest planet is made mainly of rock. |
train/1635 | Which statement best describes the average monthly precipitation in Atlanta? | [
"February is wetter than March.",
"October has the highest average precipitation.",
"Precipitation does not change much from month to month in Atlanta."
] | 2 | 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 Atlanta, look at the graph.
Choice "Feb" is incorrect.
Choice "Mar" is incorrect.
Choice "Oct" is incorrect.
Choice "Precipitation does not change much from month to month in Atlanta." is incorrect.
The average monthly precipitation changes only slightly throughout the ye... |
train/1636 | Which of the following organisms is the secondary consumer in this food web? | [
"lichen",
"bear sedge",
"Arctic fox"
] | 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 | 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 Arctic fox has an arrow pointing to it from the brown lemming. The brown lemming ... |
train/1637 | Which of these states is farthest east? | [
"Pennsylvania",
"Georgia",
"Oklahoma",
"North Dakota"
] | 0 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Pennsylvania is farthest east. | |
train/1638 | Select the organism in the same species as the Victoria crowned pigeon. | [
"Aequorea victoria",
"Python molurus",
"Goura victoria"
] | 2 | This organism is a Victoria crowned pigeon. Its scientific name is Goura victoria. | 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 Victoria crowned pigeon's scientific name is Goura victoria.
Python molurus does not have the same scientific name as a Victoria crowned pigeon. So, Goura victoria and Python molurus are not in the same species.
Goura victoria has the same scientific name as a Victoria crowned pigeon. So, these organisms are in the s... |
train/1639 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 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 | 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,... | 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/1640 | Which material is this grocery bag made of? | [
"polyester",
"paper"
] | 1 | closed choice | grade2 | 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 grocery bag.
The grocery bag is made of paper.
Paper is made of wood pulp. You can use paper grocery bags until they start to tear. Then, you can recycle them. | |
train/1641 | Which of these states is farthest north? | [
"California",
"Mississippi",
"Florida",
"Texas"
] | 0 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. California is farthest north. | |
train/1642 | Is plastic a mineral? | [
"no",
"yes"
] | 0 | Plastic has the following properties:
no fixed crystal structure
solid
not a pure substance
human-made | yes or no | grade5 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Plastic does not have all the properties of a mineral. So, plastic is not a mineral. |
train/1643 | Which country is highlighted? | [
"Australia",
"Solomon Islands",
"New Zealand",
"Papua New Guinea"
] | 0 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Australia.
Is Australia a country or a continent?
Both! Australia is a country in Oceania, a region made up of many lands and islands in the Pacific Ocean. Many people say that Australia is the world's smallest continent. But some people call Oceania a continent instead. | ||
train/1644 | What is the name of the colony shown? | [
"Maryland",
"Virginia",
"Iowa",
"West Virginia"
] | 1 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Virginia.
The Virginia Colony included land that would later become part of the state of West Virginia. West Virginia was never its own colony. | ||
train/1645 | Select the bird below. | [
"American bullfrog",
"albatross",
"red-eyed tree frog",
"hammerhead shark"
] | 1 | Birds have feathers, two wings, and a beak.
Birds are warm-blooded. Warm-blooded animals can control their body temperature.
A white stork 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 hammerhead shark is a fish. It lives underwater. It has fins, not limbs.
Hammerhead sharks get their names from the shape of their heads. They have a wide, flat head and a small mouth.
A red-eyed tree frog is an amphibian. It has moist skin and begins its life in water.
A red-eyed tree frog has sticky pads on its toe... |
train/1646 | Complete the statement.
Fluorine is (). | [
"a compound",
"an elementary substance"
] | 1 | The model below represents a molecule of fluorine. Fluorine is found in chemicals that are used to make some types of waterproof clothes. | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | All substances are made of one or more chemical elements, or types of atoms. Substances that are made of only one chemical element are elementary substances. Substances that are made of two or more chemical elements bonded together are compounds.
Every chemical element is represented by its own symbol. For some element... | Count the number of chemical elements represented in the model. Then, decide if fluorine is an elementary substance or a compound.
In this model, both balls are labeled with F. So, the model shows you that fluorine is made of one chemical element.
Substances made of only one chemical element are elementary substances. ... |
train/1647 | Which solution has a higher concentration of pink particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each pink 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 pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container.
Use the concentration formula to find the number of pink particles per milliliter.
... |
train/1648 | In this food chain, the sludge worm is a consumer. Why? | [
"It makes its own food.",
"It eats another organism."
] | 1 | This diagram shows a food chain from the River Frome, a freshwater ecosystem in England. | closed choice | grade4 | natural science | biology | Ecosystems | Identify roles in food chains | Every organism needs food to stay alive. Organisms get their food in different ways. A food chain shows how organisms in an ecosystem get their food.
Producers make their own food. Many producers use carbon dioxide, water, and sunlight to make sugar. This sugar is food for the producer.
Consumers eat other organisms. C... | In this food chain, the sludge worm is a consumer because it eats another organism. The sludge worm in this food chain eats the macroalgae. |
train/1649 | 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 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 2."
] | 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, but some of them are different sizes and shapes. | closed choice | grade5 | natural science | physics | Magnets | 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 smaller the magnets, the smaller the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is smaller in Pair 2 than in Pair 1. So, the magnit... |
train/1650 | What is the capital of South Dakota? | [
"Des Moines",
"Lansing",
"Sioux Falls",
"Pierre"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | ||
train/1651 | Which better describes the Great Barrier Reef ecosystem? | [
"It has water with not much salt. It also has many different types of organisms.",
"It has salty water. It also has many different types of organisms."
] | 1 | Figure: Great Barrier Reef.
The Great Barrier Reef is a tropical coral reef ecosystem near the northeastern coast of Australia. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A tropical coral reef is a type of ecosystem. Tropical coral reefs have the following features: shallow, salty water, bright sunlight, and many different types of organisms. So, the Great Barrier Reef has salty water. It also has many different types of organisms. |
train/1652 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The 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/1653 | Which country is highlighted? | [
"the Dominican Republic",
"Saint Kitts and Nevis",
"Dominica",
"Haiti"
] | 0 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is the Dominican Republic.
Why does the Dominican Republic share its island with another country?
The Dominican Republic and Haiti share the island of Hispaniola. It is home to the earliest European settlements in the Americas. Christopher Columbus founded the first European settlement on the island in 149... | ||
train/1654 | What type of rock is schist? | [
"metamorphic",
"sedimentary"
] | 0 | Schist is a type of rock. It can form when a rock is changed by heating and squeezing. This piece of schist is dotted with dark-gray mineral grains. | closed choice | grade3 | 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 to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when a rock is chang... | Schist is a metamorphic rock. Like other metamorphic rocks, it forms when a rock is changed by heating and squeezing.
The center of our planet is very hot. Deep below Earth's surface, rocks can be heated to high temperatures. The rocks can also be squeezed by the weight of rocks around them. Sometimes, the heating and ... |
train/1655 | Which continent is highlighted? | [
"North America",
"Australia",
"Asia",
"Antarctica"
] | 2 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Asia. | |
train/1656 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | 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 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/1657 | What is the name of the colony shown? | [
"Massachusetts",
"North Carolina",
"New Jersey",
"Ohio"
] | 1 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is North Carolina. | ||
train/1658 | Is the following statement about our solar system true or false?
The smallest planet is made mainly of rock. | [
"false",
"true"
] | 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 the smallest planet is Mercury and that Mercury is made mainly of rock. So, the smallest planet is made mainly of rock. |
train/1659 | Identify the question that Emmett'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.
Emmett 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, Emmett ... | 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/1660 | Is the following statement about our solar system true or false?
Jupiter's volume is more than ten times as large as Saturn's volume. | [
"true",
"false"
] | 1 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To determine if this statement is true, calculate the value of ten times the volume of Saturn.
Then compare the result to the volume of Jupiter. The volume of Jupiter is 1.43 x 10^15 km^3, which is less than 8.27 x 10^15 km^3. So, Jupiter's volume is less than ten times as large as Saturn's volume. |
train/1661 | Complete the sentence.
The Saharan Atlas formed at a () boundary. | [
"convergent",
"transform",
"divergent"
] | 0 | Read the passage and look at the picture.
The Saharan Atlas, a mountain range in northern Africa, began to form millions of years ago as the Eurasian Plate and the African Plate moved toward each other. As the plates collided, the continental crust was forced upward to form tall mountains.
Along the sides of the mounta... | closed choice | grade8 | natural science | earth-science | Plate tectonics | Describe tectonic plate boundaries around the world | The outer layer of Earth is broken up into many pieces called tectonic plates, or simply plates. The breaks between plates are called plate boundaries. Plate boundaries are classified by the way the plates are moving relative to each other:
At a divergent boundary, two plates are moving away from each other.
At a trans... | To figure out what type of plate boundary formed the Saharan Atlas, you need to know how the tectonic plates interacted. To find this out, read the passage carefully.
The Saharan Atlas, a mountain range in northern Africa, began to form millions of years ago as the Eurasian Plate and the African Plate moved toward each... |
train/1662 | Complete the statement.
Ammonia is (). | [
"an elementary substance",
"a compound"
] | 1 | The model below represents a molecule of ammonia. Most of the ammonia produced every year is used by farmers to help crops grow. | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | All substances are made of one or more chemical elements, or types of atoms. Substances that are made of only one chemical element are elementary substances. Substances that are made of two or more chemical elements bonded together are compounds.
Every chemical element is represented by its own symbol. For some element... | Count the number of chemical elements represented in the model. Then, decide if ammonia is an elementary substance or a compound.
In this model, each ball is labeled with N for nitrogen or H for hydrogen. So, the model shows you that ammonia is made of two chemical elements bonded together.
Substances made of two or mo... |
train/1663 | Select the fish below. | [
"clownfish",
"gray wolf"
] | 0 | Fish live underwater. They have fins, not limbs. A bull shark is an example of a fish. | closed choice | grade3 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A gray wolf is a mammal. It has fur and feeds its young milk.
Wolves often live in family groups. A wolf mother, father, and their children travel together.
A clownfish is a fish. It lives underwater. It has fins, not limbs.
Clownfish live with animals called anemones. In the image of the clownfish, you can see the gre... |
train/1664 | Which of these cities is marked on the map? | [
"San Antonio",
"Charlotte",
"Nashville",
"Oklahoma City"
] | 3 | closed choice | grade4 | social science | geography | Cities | Cities of the Southeast | The city is Oklahoma City, Oklahoma. Charlotte, San Antonio, and Nashville are marked with gray circles on the map below. | ||
train/1665 | Which country is highlighted? | [
"Saint Kitts and Nevis",
"Antigua and Barbuda",
"Cuba",
"Saint Lucia"
] | 0 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Kitts and Nevis. | ||
train/1666 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"neither; the samples have the same temperature"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | 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... | Each particle in sample B has more mass than each particle in sample A. The particles in sample B also have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average ... |
train/1667 | What is the name of the colony shown? | [
"Virginia",
"Wisconsin",
"New Hampshire",
"North Carolina"
] | 3 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is North Carolina. | ||
train/1668 | Which property do these four objects have in common? | [
"sour",
"smooth",
"flexible"
] | 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 smooth object is not scratchy or rough. All four objects are smooth.
A flexible object can be folded or bent without breaking easily. The helium balloons and the metal paper clip are flexible, but the glass is not.
A lemon has a sour taste. The gla... |
train/1669 | 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."
] | 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 shapes. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | 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/1670 | Which statement describes the Gran Sabana ecosystem? | [
"It has cool summers and long, cold winters.",
"It has a small amount of rain.",
"It has soil that is poor in nutrients."
] | 2 | Figure: Gran Sabana.
The Gran Sabana is a savanna grassland ecosystem in southeastern Venezuela. This savanna has many flat-topped mountains called mesas. | closed choice | grade7 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A savanna grassland is a type of ecosystem. Savanna grasslands have the following features: warm summers and warm winters, a rainy season and a dry season, and soil that is poor in nutrients. So, the following statement describes the Gran Sabana ecosystem: warm summers and warm winters, a rainy season and a dry season,... |
train/1671 | Which property matches this object? | [
"yellow",
"flexible"
] | 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.
Yellow is a color.
This color is yellow. The rubber band is not yellow.
A flexible object can be folded or bent without breaking easily. The rubber band is flexible. |
train/1672 | Which i in column 3? | [
"the gas station",
"the grocery store",
"the fire department",
"the park"
] | 2 | closed choice | grade3 | social science | geography | Geography | Use a letter-number grid | A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map.
A row is a line of squares that goes from side to side. Rows are marked with letters.
A column is a line of squares that goes up and down. Columns are marked with numbers. | The fire department is in column 3. | |
train/1673 | What is the capital of Rhode Island? | [
"Newport",
"Providence",
"Montpelier",
"Concord"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Providence is the capital of Rhode Island. | ||
train/1674 | Select the bird below. | [
"mandarinfish",
"American bullfrog",
"emerald hummingbird",
"California toad"
] | 2 | Birds have feathers, two wings, and a beak.
Birds are warm-blooded. Warm-blooded animals can control their body temperature.
An ostrich 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. | An American bullfrog is an amphibian. It has moist skin and begins its life in water.
Frogs live near water or in damp places. Most frogs lay their eggs in water.
A mandarinfish is a fish. It lives underwater. It has fins, not limbs.
Mandarinfish often live near coral reefs. They eat small worms, snails, and fish eggs.... |
train/1675 | What is the capital of Oregon? | [
"Boise",
"Portland",
"Albuquerque",
"Salem"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Salem is the capital of Oregon. | ||
train/1676 | Which animal's skin is better adapted for protection against a predator with sharp teeth? | [
"kingsnake",
"southern three-banded armadillo"
] | 1 | Giant pangolins are adapted to defend their bodies against a predator with sharp teeth. They have hard scales covering much of their skin. When frightened, the can roll into a ball to protect the soft parts of its body.
Figure: giant pangolin. | 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 giant pangolin.
The giant pangolin has hard scales on its skin. Its skin is adapted for protection against a predator with sharp teeth. The scales make it difficult for predators to hurt or kill the giant pangolin.
Now look at each animal. Figure out which animal has a similar adaptation.
The... |
train/1677 | What is the capital of Nebraska? | [
"Montpelier",
"Indianapolis",
"Omaha",
"Lincoln"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Lincoln is the capital of Nebraska. | ||
train/1678 | Which country is highlighted? | [
"Antigua and Barbuda",
"Grenada",
"Jamaica",
"Haiti"
] | 2 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Jamaica. | ||
train/1679 | Which material is this plate made of? | [
"paper",
"rock"
] | 0 | closed choice | grade2 | 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 plate.
The plate is made of paper.
You can break down paper plates by mixing them with food scraps and adding worms! The worms and other living things break down the mix into soil. Breaking down objects into soil is called composting. | |
train/1680 | Identify the question that Mike's experiment can best answer. | [
"Do cardinals eat more seeds per visit from feeders containing sunflower seeds compared to feeders containing flax seeds?",
"Do cardinals visit feeders containing sunflower seeds more often than feeders containing flax seeds?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Mike set up five pairs of platform bird feeders around his yard. He filled one feeder in each pair with sunflower seeds and the other feeder with flax seeds. For one week, Mike watched cardinals visiting the feeders dur... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/1681 | What is the expected ratio of offspring that have Marfan syndrome to offspring that do not have Marfan syndrome? Choose the most likely ratio. | [
"3:1",
"2:2",
"4:0",
"0:4",
"1:3"
] | 1 | This passage describes the Marfan syndrome trait in humans:
Marfan syndrome is a condition that affects a protein called fibrillin. Fibrillin helps support many parts of the human body and also affects growth. Humans with Marfan syndrome tend to be taller than average and have long limbs, fingers, and toes. They may al... | 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 that do or do not have Marfan syndrome, consider whether each phenotype is the dominant or recessive allele's version of the Marfan syndrome trait. The question tells you that the M allele, which is for having Marfan syndrome, is dominant over the m ... |
train/1682 | What is the capital of Idaho? | [
"Boulder",
"Nampa",
"Boise",
"Phoenix"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Boise is the capital of Idaho. | ||
train/1683 | What is the capital of Maine? | [
"Portland",
"Albany",
"Augusta",
"Harrisburg"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Augusta is the capital of Maine. | ||
train/1684 | Which solution has a higher concentration of purple particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 2 | The diagram below is a model of two solutions. Each purple 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 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/1685 | Which better describes the Gunung Leuser National Park ecosystem? | [
"It has soil that is poor in nutrients. It also has only a few types of organisms.",
"It has year-round rain. It also has soil that is poor in nutrients."
] | 1 | Figure: Gunung Leuser National Park.
Gunung Leuser National Park is a tropical rain forest ecosystem in Sumatra, an island in western Indonesia. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A tropical rain forest is a type of ecosystem. Tropical rain forests have the following features: year-round rain and warm temperatures, soil that is poor in nutrients, and many different types of organisms. So, Gunung Leuser National Park has year-round rain. It also has soil that is poor in nutrients. |
train/1686 | What is the capital of Colorado? | [
"Denver",
"Nampa",
"Frankfort",
"Helena"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Denver is the capital of Colorado. | ||
train/1687 | 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 1.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 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 | grade5 | natural science | physics | Magnets | 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/1688 | What is the capital of Oregon? | [
"Portland",
"Dover",
"Salem",
"Carson City"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. | ||
train/1689 | Based on the timeline, which statement is true? | [
"No colonists were killed by British soldiers before the American Revolution.",
"The First Continental Congress met to place new taxes on the Thirteen Colonies.",
"Colonists protested taxes created by the British government."
] | 2 | After the French and Indian War ended in 1763, the relationship between the Thirteen Colonies and Great Britain began to change.
The timeline below shows some of the events that took place before the Revolutionary War broke out in 1775. Look at the timeline. Then answer the question below. | closed choice | grade8 | social science | us-history | The American Revolution | Causes of the American Revolution: politics and society | ||
train/1690 | What is the name of the colony shown? | [
"Iowa",
"Connecticut",
"Pennsylvania",
"Illinois"
] | 2 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Pennsylvania. | ||
train/1691 | What is the direction of this push? | [
"away from her hands",
"toward her hands"
] | 0 | A girl opens a window upstairs. She uses a force to push the window open with her hands. | closed choice | grade4 | natural science | physics | Force and motion | Identify directions of forces | A force is a push or a pull that one object applies to another. Every force has a direction.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The girl pushes the window open. The direction of the push is away from her hands. |
train/1692 | Select the organism in the same species as the Iberian lynx. | [
"Felis silvestris",
"Felis nigripes",
"Lynx pardinus"
] | 2 | This organism is an Iberian lynx. Its scientific name is Lynx pardinus. | 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... | An Iberian lynx's scientific name is Lynx pardinus.
Felis nigripes does not have the same scientific name as an Iberian lynx. So, Lynx pardinus and Felis nigripes are not in the same species.
Lynx pardinus has the same scientific name as an Iberian lynx. So, these organisms are in the same species.
Felis silvestris doe... |
train/1693 | Select the organism in the same genus as the black-blotched porcupinefish. | [
"Amphiprion perideraion",
"Alopias pelagicus",
"Diodon liturosus"
] | 2 | This organism is a black-blotched porcupinefish. Its scientific name is Diodon liturosus. | 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 black-blotched porcupinefish's scientific name is Diodon liturosus. The first word of its scientific name is Diodon.
This organism and the black-blotched porcupinefish are in the same genus and the same species! Both organisms have the same scientific name, Diodon liturosus.
Amphiprion perideraion is in the genus Amp... |
train/1694 | Which of these continents does the equator intersect? | [
"South America",
"Australia",
"Europe"
] | 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 equator is the line at 0° latitude. It intersects South America. It does not intersect Europe or Australia. | |
train/1695 | Select the mammal below. | [
"brown pelican",
"fruit bat",
"barn owl",
"emu"
] | 1 | Mammals have hair or fur and feed their young milk.
Mammals are warm-blooded. Warm-blooded animals can control their body temperature.
A red howler is an example of a mammal. | 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 fruit bat is a mammal. It has hair and feeds its young milk.
Fruit bats eat fruit and drink nectar from flowers. They have special teeth to help them bite through fruit skins.
An emu is a bird. It has feathers, two wings, and a beak.
Emus cannot fly, but they can run very fast. They run to avoid predators.
A barn owl... |
train/1696 | Is the following statement about our solar system true or false?
Saturn's volume is more than 50% of Jupiter's volume. | [
"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 50% of Jupiter's volume by multiplying Jupiter's volume by 0.5.
Then compare the result to the volume of Saturn. The volume of Saturn is 827,130 billion km^3, which is more than 715,640 billion km^3. So, Saturn's volume is more than 50% of Jupiter's volume. |
train/1697 | Which of these states is farthest north? | [
"California",
"Pennsylvania",
"Utah",
"Virginia"
] | 1 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Pennsylvania is farthest north. | |
train/1698 | 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 | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in sample B has more mass than each particle in sample A. The particles in sample B also have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average ... |
train/1699 | What is the capital of Hawaii? | [
"Hilo",
"Honolulu",
"Helena",
"Missoula"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Honolulu is the capital of Hawaii. |
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