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train/4500 | Which continent is highlighted? | [
"Australia",
"Africa",
"North America",
"Asia"
] | 1 | closed choice | grade6 | social science | geography | Physical Geography | Oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Africa. | |
train/4501 | Is a clothespin 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 clothespin is a solid. A solid has a size and shape of its own.
You can open or close a clothespin. But it will still have a size and shape of its own. | |
train/4502 | Which material is this clipboard made of? | [
"metal",
"asphalt"
] | 0 | 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 clipboard.
The clipboard is made of two different materials. The back is made of wood, and the clip is made of metal.
Not all clipboards are made of wood. Some clipboards are made of other materials, such as plastic. | |
train/4503 | What is the capital of Alaska? | [
"Houston",
"Anchorage",
"Juneau",
"Fairbanks"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/4504 | Which i in row A? | [
"the fast-food restaurant",
"the fire department",
"the grocery store",
"the theater"
] | 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 grocery store is in row A. | |
train/4505 | Select the organism in the same genus as the garden hyacinth. | [
"Hyacinthus orientalis",
"Ovis orientalis",
"Lissotriton helveticus"
] | 0 | This organism is a garden hyacinth. Its scientific name is Hyacinthus orientalis. | closed choice | grade5 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A garden hyacinth's scientific name is Hyacinthus orientalis. The first word of its scientific name is Hyacinthus.
Ovis orientalis and Hyacinthus orientalis are not in the same genus.
These organisms are not in the same genus, but part of their scientific names is the same. Ovis orientalis and Hyacinthus orientalis hav... |
train/4506 | Which of these states is farthest north? | [
"Iowa",
"Florida",
"Utah",
"North Dakota"
] | 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 north arrow is pointing. North Dakota is farthest north. | |
train/4507 | Which material is this shovel made of? | [
"wood",
"rock"
] | 0 | closed choice | grade3 | 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 shovel.
The shovel is made of two different materials. The handle is made of wood, and the head is made of metal.
Metal is a tough material. It does not break easily. This makes metal a good material for the head of a shovel. You don't want your shovel to break if you hit a rock while you're ... | |
train/4508 | What is the capital of South Dakota? | [
"Pierre",
"Des Moines",
"Saint Paul",
"Madison"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | ||
train/4509 | Select the organism in the same species as the purple heron. | [
"Ardea purpurea",
"Strix aluco",
"Sarracenia purpurea"
] | 0 | This organism is a purple heron. Its scientific name is Ardea purpurea. | 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 purple heron's scientific name is Ardea purpurea.
Strix aluco does not have the same scientific name as a purple heron. So, Ardea purpurea and Strix aluco are not in the same species.
Sarracenia purpurea does have the same species within its genus as a purple heron, but they are not in the same genus! They do not hav... |
train/4510 | Which of these states is farthest east? | [
"Montana",
"Michigan",
"North Carolina",
"Kentucky"
] | 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 east arrow is pointing. North Carolina is farthest east. | |
train/4511 | Which animal's mouth is also adapted to tear through meat? | [
"Nile crocodile",
"long-beaked echidna"
] | 0 | Tigers are carnivores, or meat eaters. They eat large mammals like deer. The 's mouth is adapted to tear through meat.
Figure: tiger. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's mouth is one example of an adaptation. Animals' mouths can be adapted in different ways. For example, a large mouth with sharp teeth might help an animal tear ... | Look at the picture of the tiger.
The tiger has a large mouth and sharp teeth. Its mouth is adapted to tear through meat. The tiger uses its large mouth to grab its prey. It uses its sharp teeth to cut up the meat of the prey into pieces it can swallow.
Now look at each animal. Figure out which animal has a similar ada... |
train/4512 | Select the reptile below. | [
"Mojave rattlesnake",
"salmon"
] | 0 | Reptiles have scaly, waterproof skin. Most reptiles live on land. A dwarf crocodile is an example of a reptile. | closed choice | grade3 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A salmon is a fish. It lives underwater. It has fins, not limbs.
Unlike most other fish, salmon can live in both fresh water and salt water.
A Mojave rattlesnake is a reptile. It has scaly, waterproof skin.
Rattlesnakes have fangs they can use to inject venom into their prey. |
train/4513 | What is the capital of Idaho? | [
"Nampa",
"Salem",
"Denver",
"Boise"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Boise is the capital of Idaho. | ||
train/4514 | Which continent is highlighted? | [
"North America",
"Antarctica",
"Australia",
"Asia"
] | 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 Australia. | |
train/4515 | Select the organism in the same species as the Victoria crowned pigeon. | [
"Larus michahellis",
"Cyanocitta stelleri",
"Goura victoria"
] | 2 | This organism is a Victoria crowned pigeon. Its scientific name is Goura victoria. | closed choice | grade4 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A Victoria crowned pigeon's scientific name is Goura victoria.
Goura victoria has the same scientific name as a Victoria crowned pigeon. So, these organisms are in the same species.
Larus michahellis does not have the same scientific name as a Victoria crowned pigeon. So, Goura victoria and Larus michahellis are not in... |
train/4516 | 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 | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the 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/4517 | Which country is highlighted? | [
"Haiti",
"Jamaica",
"Saint Kitts and Nevis",
"Cuba"
] | 1 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Jamaica. | ||
train/4518 | Which is this organism's common name? | [
"Cyanea capillata",
"lion's mane jellyfish"
] | 1 | This organism is Cyanea capillata. It is also called a lion's mane jellyfish. | 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,... | Cyanea capillata is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Cyanea capillata is the organism's scientific name. So, you know that lion's mane jellyfish is the common name. |
train/4519 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/4520 | What can Sean and Logan trade to each get what they want? | [
"Logan can trade his almonds for Sean's tomatoes.",
"Sean can trade his tomatoes for Logan's broccoli.",
"Logan can trade his broccoli for Sean's oranges.",
"Sean can trade his tomatoes for Logan'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.
Sean and Logan open their lunch boxes in the school cafeteria. Neither Sean nor Logan got everything that they wanted. The table ... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Sean wants broccoli. Logan 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/4521 | Which of these cities is marked on the map? | [
"Houston",
"New Orleans",
"Nashville",
"Dallas"
] | 3 | closed choice | grade4 | social science | geography | Cities | Cities of the Southeast | The city is Dallas, Texas. New Orleans, Houston, and Nashville are marked with gray circles on the map below. | ||
train/4522 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each greenhouse",
"each greenhouse . . . the surroundings"
] | 0 | Two identical greenhouses were next to each other. There were solar panels on the roof of one greenhouse but not on the roof of the other greenhouse. This table shows how the temperature of each greenhouse changed over 2hours. | closed choice | grade8 | 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 greenhouse increased, which means that the thermal energy of each greenhouse increased. So, thermal energy was transferred from the surroundings to each greenhouse. |
train/4523 | What is the probability that a Labrador retriever produced by this cross will be homozygous recessive for the fur color gene? | [
"1/4",
"2/4",
"0/4",
"3/4",
"4/4"
] | 2 | In a group of Labrador retrievers, some individuals have black fur and others have brown fur. In this group, the gene for the fur color trait has two alleles. The allele for brown fur (f) is recessive to the allele for black fur (F).
This Punnett square shows a cross between two Labrador retrievers. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring genotypes: homozygous or heterozygous?
How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene.
An organism with two identical alleles for a gene is homozygous for that gene.
If both alleles are dominant, the organism is h... | |
train/4524 | 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/4525 | Is brass a mineral? | [
"no",
"yes"
] | 0 | Brass has the following properties:
solid
no fixed crystal structure
made in a factory
mixture of copper and zinc | 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... | Brass does not have all the properties of a mineral. So, brass is not a mineral. |
train/4526 | Which of these cities is marked on the map? | [
"Denver",
"Los Angeles",
"Las Vegas",
"Portland"
] | 2 | closed choice | grade4 | social science | geography | Cities | Cities of the West | The city is Las Vegas, Nevada. Los Angeles, Portland, and Denver are marked with gray circles on the map below. | ||
train/4527 | Which of these states is farthest north? | [
"Wisconsin",
"Alabama",
"Nevada",
"Maryland"
] | 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. Wisconsin is farthest north. | |
train/4528 | What is the capital of Ohio? | [
"Columbus",
"Indianapolis",
"Cincinnati",
"Cleveland"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Columbus is the capital of Ohio. | ||
train/4529 | Which continent is highlighted? | [
"North America",
"Asia",
"South America",
"Australia"
] | 0 | 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 North America. | |
train/4530 | Which country is highlighted? | [
"Australia",
"Papua New Guinea",
"Solomon Islands",
"Samoa"
] | 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/4531 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is stronger in Pair 2.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger.
The magnets in Pair 2 are closer together than the magnets in Pair 1. So, the magnetic force is stronger in Pair 2 than in Pair 1. |
train/4532 | During this time, thermal energy was transferred from () to (). | [
"each battery . . . the surroundings",
"the surroundings . . . each battery"
] | 0 | Two friends bought phones that cost different amounts but had identical batteries. After using the phones for a while, both friends had to turn them off to let the batteries cool. This table shows how the temperature of each battery changed over 5minutes. | 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 battery decreased, which means that the thermal energy of each battery decreased. So, thermal energy was transferred from each battery to the surroundings. |
train/4533 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 0 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/4534 | Which of the following statements is supported by the passage? | [
"Some air masses contain dry air; other air masses contain moist air.",
"Meteorologists are scientists who study meteors."
] | 0 | Meteorologists can make predictions about weather events. For example, the passage below describes how a meteorologist might use observations of Earth's atmosphere to predict a tornado event.
Figure: a tornado passing through a field. | closed choice | grade6 | natural science | earth-science | Weather and climate | Explore air masses | ||
train/4535 | What can Caleb and Aiden trade to each get what they want? | [
"Aiden can trade his broccoli for Caleb's oranges.",
"Caleb can trade his tomatoes for Aiden's broccoli.",
"Caleb can trade his tomatoes for Aiden's carrots.",
"Aiden can trade his almonds for Caleb's tomatoes."
] | 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.
Caleb and Aiden open their lunch boxes in the school cafeteria. Neither Caleb nor Aiden got everything that they wanted. The tabl... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Caleb wants broccoli. Aiden 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/4536 | What is the capital of New Hampshire? | [
"Provo",
"Albany",
"Jefferson City",
"Concord"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Concord is the capital of New Hampshire. | ||
train/4537 | What is the capital of South Carolina? | [
"Columbia",
"Nampa",
"Charleston",
"Phoenix"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Columbia is the capital of South Carolina. | ||
train/4538 | Which property matches this object? | [
"breakable",
"bouncy"
] | 0 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. | Look at the object.
Think about each property.
A bouncy object will bounce back from the floor if you drop it. The clay flower pot is not bouncy.
A breakable object will break into pieces if you drop it. The clay flower pot is breakable. |
train/4539 | Which animal's feet are also adapted for sticking to smooth surfaces? | [
"Costa Rica brook frog",
"blue-footed booby"
] | 0 | Red-eyed tree frogs live in the rain forests of Central America. They spend most of their lives in trees. The feet of the tree frog are adapted to stick to the smooth surfaces of leaves.
Figure: red-eyed tree frog. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's feet is one example of an adaptation. Animals' feet can be adapted in different ways. For example, webbed feet might help an animal swim. Feet with thick fur m... | Look at the picture of the red-eyed tree frog.
The red-eyed tree frog has wide, sticky toes. Its feet are adapted for sticking to smooth surfaces. The red-eyed tree frog uses its toes to walk on the smooth surfaces of leaves without slipping.
Now look at each animal. Figure out which animal has a similar adaptation.
Th... |
train/4540 | What is the capital of Indiana? | [
"Indianapolis",
"Topeka",
"Fort Wayne",
"Providence"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Indianapolis is the capital of Indiana. | ||
train/4541 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 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 north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/4542 | Which animal's limbs are also adapted for climbing trees? | [
"white-cheeked gibbon",
"California sea lion"
] | 0 | Chimpanzees live in the forests of Central Africa. Their limbs are adapted for climbing trees.
Figure: chimpanzee. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
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 chimpanzee.
The chimpanzee uses its long limbs to reach branches while climbing. It uses its fingers and toes to grab the branches.
Now look at each animal. Figure out which animal has a similar adaptation.
The white-cheeked gibbon has long limbs with fingers and toes. Its limbs are adapted f... |
train/4543 | What is the name of the colony shown? | [
"Georgia",
"South Carolina",
"North Carolina",
"Florida"
] | 1 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is South Carolina. | ||
train/4544 | As Ivan pulls on the umbrella, what is the direction of the opposing force? | [
"away from Ivan",
"toward Ivan"
] | 0 | The text below describes a pair of opposing forces. Opposing forces act on an object in opposite directions. Read the text. Then answer the question below.
Ivan uses his umbrella on a windy day. Think about two of the forces that act on the umbrella:
Ivan pulls toward himself.
The wind pushes away from Ivan. | closed choice | grade3 | natural science | physics | Force and motion | How do balanced and unbalanced forces affect motion? | A force is a push or a pull that acts on an object. Each force acts on an object in a certain direction. If two forces act on an object in opposite directions, they are called opposing forces. | Find the direction Ivan pulls on the umbrella.
Ivan uses his umbrella on a windy day. Think about two of the forces that act on the umbrella:
Ivan pulls toward himself.
The wind pushes away from Ivan.
The text tells you that Ivan pulls toward himself. The opposite direction is away from Ivan. So, the direction of the o... |
train/4545 | Which type of relationship is formed when a cleaner wrasse eats parasites off a moray eel? | [
"commensal",
"mutualistic",
"parasitic"
] | 1 | Read the passage. Then answer the question.
Cleaner wrasse are small fish that live in tropical coral reefs. Wrasse are often visited by larger fish, such as moray eels.
When an eel visits a wrasse, the wrasse cleans the eel by eating parasites attached to the eel's body. If the parasites are not removed, the eel may ... | 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 cleaner wrasse removes parasites from a moray eel, the wrasse gets food that it needs to grow and survive. So, the wrasse benefits from its relationship with the eel.
The eel is stronger and less likely to die after the wrasse removes the parasites. So, the eel also benefits from its relationship with the wrasse... |
train/4546 | What is the capital of Nevada? | [
"Carson City",
"Helena",
"Reno",
"Las Vegas"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Carson City is the capital of Nevada. | ||
train/4547 | Which bird's beak is also adapted to catch fish? | [
"Asian golden weaver",
"lesser noddy"
] | 1 | Snowy egrets live near wetlands and lakes. A large part of their diet is fish. The shape of the 's beak is adapted to catch fish.
Figure: snowy egret. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the snowy egret.
The snowy egret has a long, straight beak with a sharp tip. Its beak is adapted to catch fish. The snowy egret can use its beak to grab the slippery body of a fish underwater. It can also catch a fish by stabbing it with its beak.
Now look at each bird. Figure out which bird has ... |
train/4548 | What is the capital of Washington? | [
"Oklahoma City",
"Richmond",
"Olympia",
"Sacramento"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Olympia is the capital of Washington. | ||
train/4549 | In this experiment, which were part of an experimental group? | [
"the apple slices covered with lemon juice",
"the plain apple slices"
] | 0 | The passage below describes an experiment.
The in Tammy's lunch always turned brown by lunchtime. Tammy's favorite cooking website said that pouring lemon juice on the would keep them from turning brown so quickly.
Tammy cut an apple into eight slices. She poured two tablespoons of lemon juice over four of the slice... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify control and experimental groups | Experiments have variables, or parts that change. You can design an experiment to investigate whether changing a variable between different groups has a specific outcome.
For example, imagine you want to find out whether adding fertilizer to soil affects the height of pea plants. You could investigate this question wit... | In this experiment, Tammy investigated whether lemon juice affects how quickly apple slices turn brown. So, the apple slices covered with lemon juice were part of an experimental group.
The plain apple slices did not get lemon juice. So, they were not part of an experimental group. |
train/4550 | Which of these states is farthest east? | [
"Washington",
"Florida",
"New Hampshire",
"Tennessee"
] | 2 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. New Hampshire is farthest east. | |
train/4551 | Identify the question that Danny's experiment can best answer. | [
"Can pennies hold more drops of pure water or water mixed with hand soap?",
"Can pennies hold more drops of water mixed with dish soap or water mixed with hand soap?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Danny used a dropper to put equal-sized drops of pure water, one at a time, onto a penny. The drops stayed together and formed a dome on the penny's surface. Danny recorded the number of drops he could add before the wa... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/4552 | Is hornblende a mineral? | [
"yes",
"no"
] | 0 | Hornblende has the following properties:
not made by living things
naturally occurring
fixed crystal structure
pure substance
solid | yes or no | grade5 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Hornblende has all the properties of a mineral. So, hornblende is a mineral. |
train/4553 | Which of these continents does the prime meridian intersect? | [
"Africa",
"North America",
"Asia"
] | 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 Africa. It does not intersect North America or Asia. | |
train/4554 | What is the capital of Kentucky? | [
"Little Rock",
"Sacramento",
"Raleigh",
"Frankfort"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Frankfort is the capital of Kentucky. | ||
train/4555 | What is the capital of Idaho? | [
"Carson City",
"Nampa",
"Boise",
"Sacramento"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Boise is the capital of Idaho. | ||
train/4556 | Complete the sentence.
The Aleutian Trench formed at a () boundary. | [
"convergent",
"divergent",
"transform"
] | 0 | Read the passage and look at the picture.
The Aleutian Trench extends 2,900 kilometers along the floor of the Pacific Ocean between Alaska and Russia. At this deep-sea trench, the Pacific Plate and the North American Plate are moving toward each other. As the two plates collide, the Pacific Plate subducts, or sinks, be... | 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 Aleutian Trench, you need to know how the tectonic plates interacted. To find this out, read the passage carefully.
The Aleutian Trench extends 2,900 kilometers along the floor of the Pacific Ocean between Alaska and Russia. At this deep-sea trench, the Pacific Plate... |
train/4557 | Which property do these three objects have in common? | [
"slippery",
"stretchy",
"scratchy"
] | 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 slippery object is hard to hold onto or stand on. All three objects are slippery.
A stretchy object gets longer when you pull on it. None of the objects are stretchy.
A scratchy object is rough and itchy against your skin. None of the objects are s... |
train/4558 | 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... | Each particle in sample A has more mass than each particle in sample B. The particles in sample A also have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average ... |
train/4559 | Select the mammal below. | [
"human",
"pelican"
] | 0 | Mammals have hair or fur and feed their young milk. A kangaroo is an example of a mammal. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A pelican is a bird. It has feathers, two wings, and a beak.
A human is a mammal. It has hair and feeds its young milk. |
train/4560 | Which property do these three objects have in common? | [
"hard",
"sweet",
"opaque"
] | 0 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
An opaque object does not let light through. The trombone and the wooden ruler are opaque, but the glass flask is not.
Sugar has a sweet taste. The trombone is not sweet.
A hard object does not change shape when pressed or squeezed. All three objects... |
train/4561 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: New Zealand.
Dry air has a lower level of humidity than moist air. The air around these volcanoes is usually dry and cold throughout the year.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade5 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Dry air has a lower level of humidity than moist air. The air around these volcanoes is usually dry and cold throughout the year.
The underlined part of the passage tells you about the usual pattern of humidity around the volcanoes. This passage does not describe what the weather is like on ... |
train/4562 | Which ocean is highlighted? | [
"the Indian Ocean",
"the Arctic Ocean",
"the Atlantic Ocean",
"the Southern Ocean"
] | 1 | closed choice | grade7 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Arctic Ocean. | |
train/4563 | What is the capital of Illinois? | [
"Springfield",
"Chicago",
"Sacramento",
"Newport"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Springfield is the capital of Illinois. | ||
train/4564 | What is the capital of Maine? | [
"Lexington",
"Louisville",
"Portland",
"Augusta"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Augusta is the capital of Maine. | ||
train/4565 | What is the capital of Wyoming? | [
"Cheyenne",
"Boise",
"Pierre",
"Baton Rouge"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | ||
train/4566 | Complete the sentence.
The Mid-Atlantic Ridge formed at a () boundary. | [
"divergent",
"transform",
"convergent"
] | 0 | Read the passage and look at the picture.
The Mid-Atlantic Ridge is a massive mountain chain that runs along the floor of the Atlantic Ocean. On this map, the ridge is shown by the light blue area between Africa and South America. The dark blue areas on either side of the ridge show deeper regions of the ocean.
The Mid... | 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 transform boundary, two plates are sliding past each other.
At a convergen... | To figure out what type of plate boundary formed the Mid-Atlantic Ridge, you need to know how the tectonic plates interacted. To find this out, read the passage carefully.
The Mid-Atlantic Ridge is a massive mountain chain that runs along the floor of the Atlantic Ocean. On this map, the ridge is shown by the light blu... |
train/4567 | What is the capital of Nebraska? | [
"Santa Fe",
"Lincoln",
"Omaha",
"Bismarck"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Lincoln is the capital of Nebraska. | ||
train/4568 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. |
train/4569 | 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 smaller in Pair 2.",
"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 | 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,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magni... |
train/4570 | Is a kimono a solid, a liquid, or a gas? | [
"a solid",
"a gas",
"a liquid"
] | 0 | closed choice | grade4 | natural science | physics | States of matter | Identify and sort solids, liquids, and gases | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own.
Some solids can be easily folded, bent, or broken. A piece of paper is a... | A kimono is a solid. You can fold a kimono. But it will still have a size and shape of its own. | |
train/4571 | Why are puffins sometimes called clowns of the sea? | [
"Puffins have colorful faces.",
"Puffins make funny faces."
] | 0 | Read the passage about puffins.
Puffins are small, colorful birds that live mostly at sea. They are sometimes called clowns of the sea because of how they look. They have bright, colorful faces with large orange beaks.
Puffins use their wings to fly fast. They also use their wings to swim through the water and dive for... | closed choice | grade2 | language science | reading-comprehension | Independent reading comprehension | Read and understand informational passages | Look at the passage. It tells you why puffins are called clowns of the sea.
Puffins are small, colorful birds that live mostly at sea. They are sometimes called clowns of the sea because of how they look. They have bright, colorful faces with large orange beaks. | |
train/4572 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 2.",
"The magnetic force is weaker in Pair 1.",
"The strength of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 2 are farther apart than the magnets in Pair 1. So, the magnetic force is weaker in Pair 2 than in Pair 1. |
train/4573 | 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/4574 | Is andesite a mineral? | [
"no",
"yes"
] | 0 | Andesite has the following properties:
not made by organisms
not a pure substance
found in nature
no fixed crystal structure
solid | 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... | Andesite does not have all the properties of a mineral. So, andesite is not a mineral. |
train/4575 | Which is the main persuasive appeal used in this ad? | [
"pathos (emotion)",
"ethos (character)",
"logos (reason)"
] | 2 | closed choice | grade7 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals:
Appeals to ethos, or character, show that the writer or speaker is trustworthy or is an authority on a subject. An ad that appeals to ethos might do one... | The ad appeals to logos, or reason. It argues that purchasing paper from Cheaper Paper Depot is a smarter financial decision. | |
train/4576 | What is the name of the colony shown? | [
"Pennsylvania",
"Indiana",
"Virginia",
"Delaware"
] | 0 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Pennsylvania. | ||
train/4577 | Complete the statement.
Diamond is (). | [
"an elementary substance",
"a compound"
] | 0 | The model below represents diamond. Diamond is commonly used to make jewelry but is also used in tools that can cut or polish any material. | 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 diamond is an elementary substance or a compound.
Step 1: Interpret the model.
In the ball-and-stick model shown above, all of the balls are the same color:
. The legend shows that dark gray represents the chemical element with the atomic symbol C. C is the atomic symbol for the chemi... |
train/4578 | Select the organism in the same genus as the maroon clownfish. | [
"Premnas biaculeatus",
"Procambarus clarkii",
"Amphiprion melanopus"
] | 0 | This organism is a maroon clownfish. Its scientific name is Premnas biaculeatus. | 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 maroon clownfish's scientific name is Premnas biaculeatus. The first word of its scientific name is Premnas.
Procambarus clarkii is in the genus Procambarus. The first word of its scientific name is Procambarus. So, Procambarus clarkii and Premnas biaculeatus are not in the same genus.
This organism and the maroon cl... |
train/4579 | 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"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | 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 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/4580 | What type of rock is slate? | [
"igneous",
"sedimentary",
"metamorphic"
] | 2 | This is a piece of slate. Slate usually forms from a sedimentary rock called shale. Slate can form when shale is changed by high temperature and pressure.
Slate is usually dark-colored. The word blackboard comes from the color of slate. Decades ago, blackboards were made of black slate. | closed choice | grade7 | natural science | earth-science | Rocks and minerals | Classify rocks as igneous, sedimentary, or metamorphic | Igneous rock is formed when melted rock cools and hardens into solid rock. This type of change can occur at Earth's surface or below it.
Sedimentary rock is formed when layers of sediment are pressed together, or compacted, to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when ... | Slate is a metamorphic rock. Like other metamorphic rocks, it forms when a rock is changed by high temperature and pressure.
Heat and pressure can change the type and arrangement of minerals in a rock. This change forms a new rock with different properties. Slate can form when sedimentary rocks such as shale are change... |
train/4581 | Which bird's beak is also adapted to tear through meat? | [
"bufflehead",
"turkey vulture"
] | 1 | s are scavengers. They find and eat the bodies of dead animals. The shape of the 's beak is adapted to tear through meat.
Figure: California condor. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the California condor.
The California condor has a sharp hooked beak. Its beak is adapted to tear through meat. The sharp hook can help the California condor cut the meat into pieces it can swallow.
Now look at each bird. Figure out which bird has a similar adaptation.
The turkey vulture has a sh... |
train/4582 | Is pumice a mineral or a rock? | [
"rock",
"mineral"
] | 0 | Pumice has the following properties:
has many small holes
solid
not made by living things
found in nature
no fixed crystal structure
not a pure substance | closed choice | grade8 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | The properties of pumice match the properties of a rock. So, pumice is a rock. |
train/4583 | What can happen when an egg is fertilized? | [
"It can make pollen.",
"It can grow into a mature fern."
] | 1 | This diagram shows the life cycle of a fern. | closed choice | grade7 | natural science | biology | Plant reproduction | Moss and fern life cycles | Fern plants reproduce using both asexual reproduction and sexual reproduction.
Mature ferns have flat leaves called fronds. Ferns have structures that look like small dots on the underside of their fronds. These structures are called spore cases. The mature ferns use asexual reproduction to make spores. When the spore ... | A fertilized egg can grow into a mature fern.
Ferns do not produce pollen. Instead, heart-shaped plants produce sperm. |
train/4584 | Select the fish below. | [
"bald eagle",
"piranha"
] | 1 | Fish live underwater. They have fins, not limbs. A tiger shark 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 bald eagle is a bird. It has feathers, two wings, and a beak.
A piranha is a fish. It lives underwater. It has fins, not limbs. |
train/4585 | Which is this organism's common name? | [
"snowy owl",
"Bubo scandiacus"
] | 0 | This organism is a snowy owl. It is also called Bubo scandiacus. | 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,... | Bubo scandiacus is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Bubo scandiacus is the organism's scientific name. So, you know that snowy owl is the common name. |
train/4586 | What is the capital of Minnesota? | [
"Saint Paul",
"Columbus",
"Manchester",
"Minneapolis"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Saint Paul is the capital of Minnesota. | ||
train/4587 | Look at the picture. Which word best describes how this pretzel tastes? | [
"juicy",
"salty",
"fruity"
] | 1 | closed choice | grade2 | language science | writing-strategies | Descriptive details | Choose the sensory details that match the picture | When you write, you can use sensory details. These sense words help your reader understand what something looks, sounds, tastes, smells, or feels like.
Sensory Category | Description
Sight | These are words like bright, clean, and purple. A reader can imagine looking at these details.
Sound | These are words like hissi... | Look at the picture.
The word salty describes how this pretzel tastes.
Fruity and juicy can also describe how something tastes. But they do not describe this pretzel. | |
train/4588 | Which solution has a higher concentration of purple particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 0 | 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/4589 | Which of these states is farthest north? | [
"New Mexico",
"Georgia",
"Nevada",
"Louisiana"
] | 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. Nevada is farthest north. | |
train/4590 | Which country is highlighted? | [
"Palau",
"Fiji",
"Tuvalu",
"Tonga"
] | 3 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Tonga. | ||
train/4591 | Which state is highlighted? | [
"Nebraska",
"Kansas",
"North Dakota",
"Illinois"
] | 0 | closed choice | grade5 | social science | geography | States | Identify states of the Midwest | This state is Nebraska. | ||
train/4592 | What is the name of the colony shown? | [
"Kentucky",
"Florida",
"Connecticut",
"Rhode Island"
] | 2 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Connecticut. | ||
train/4593 | Are water droplets a solid, a liquid, or a gas? | [
"a liquid",
"a gas",
"a solid"
] | 0 | 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... | Water droplets are a liquid. A liquid takes the shape of any container it is in.
If you collect water droplets in a bucket, they will take the shape of the bucket. But the water droplets will still take up the same amount of space. | |
train/4594 | Which animal's neck is also adapted for reaching high branches? | [
"dromedary camel",
"warthog"
] | 0 | Gerenuk eat leaves and twigs. The 's neck is adapted for reaching branches that are high above the ground.
Figure: gerenuk. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of 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 gerenuk.
Now look at each animal. Figure out which animal has a similar adaptation.
The dromedary camel has a long neck. Its neck is adapted for reaching high branches.
The warthog has a short neck. Its neck is not adapted for reaching high branches. The warthog eats grasses, roots, and bulbs... |
train/4595 | Which better describes the Scarborough Marsh ecosystem? | [
"It has land that is covered with water during most of the year. It also has soil that is poor in nutrients.",
"It has soil that is rich in nutrients. It also has other water ecosystems nearby."
] | 1 | Figure: Scarborough Marsh.
Scarborough Marsh is a wetland ecosystem in southern Maine. | 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, Scarborough Marsh has soil that is rich in nutrients. It also has other water ecosystems nearby. |
train/4596 | Which specific humidity level was measured within the outlined area shown? | [
"16 grams of water vapor per kilogram of air",
"11 grams of water vapor per kilogram of air",
"21 grams of water vapor per kilogram of air"
] | 2 | The map below shows humidity in the lower atmosphere on April 9, 2016. The map shows specific humidity, a measurement of the amount of water vapor in the air. The outlined area shows an air mass that influenced weather in Africa on that day.
Look at the map. Then, answer the question below.
Data source: United States N... | closed choice | grade8 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show specific humidity, a measurement of the amount of water vapor in the air.
The map's legend tells you the specific humidity level that each color represents. Colors on the left in th... | Look at the colors shown within the outlined area. Then, use the legend to determine which specific humidity levels those colors represent.
The legend tells you that this air mass contained air with specific humidity levels between 20 and 24 grams of water vapor per kilogram of air.
21 grams of water vapor per kilogram... |
train/4597 | Which is this organism's scientific name? | [
"Cathartes aura",
"turkey vulture"
] | 0 | This organism is a turkey vulture. It is also called Cathartes aura. | closed choice | grade5 | natural science | biology | 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,... | Cathartes aura is written in italics. The first word is capitalized, and the second word is not.
So, Cathartes aura is the scientific name. |
train/4598 | What is the direction of this pull? | [
"away from her hand",
"toward her hand"
] | 1 | A teacher and student find a book to read. The teacher uses a force to pull the book off of the bookshelf. | 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 teacher pulls the book. The direction of the pull is toward her hand. |
train/4599 | Does Oxalis acetosella have cells that have a nucleus? | [
"no",
"yes"
] | 1 | This organism is Oxalis acetosella. It is a member of the plant kingdom.
Oxalis acetosella is commonly called wood sorrel. A wood sorrel plant has heart-shaped leaves and white flowers. Its flowers and leaves can fold up at night. Folding up helps protect the flowers and leaves from being eaten by insects. | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Oxalis acetosella is a plant. Plant cells have a nucleus. |
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