Split (3)

train · 12.4k rows

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train/2800	Which animal's feet are also adapted for digging?	[ "six-banded armadillo", "Weddell seal" ]	0	s are found in parts of North America. They live in burrows and eat other animals that also live in burrows. The feet of the are adapted for digging. Figure: American badger.	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 American badger. The American badger has long, straight claws. Its feet are adapted for digging. The American badger uses its claws to break up soil and move it out of the way. Now look at each animal. Figure out which animal has a similar adaptation. The six-banded armadillo has long, straig...
train/2801	Which property do these two objects have in common?	[ "sticky", "rough" ]	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 rough object feels scratchy when you touch it. The chocolate milkshake is not rough. A sticky object can stick to other things. Both objects are sticky. The property that both objects have in common is sticky.
train/2802	Which property do these two objects have in common?	[ "scratchy", "bouncy" ]	1	Select the better answer.	closed choice	grade2	natural science	physics	Materials	Compare properties of objects	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Different objects can have the same properties. You can use these properties to put objects into groups.	Look at each object. For each object, decide if it has that property. A scratchy object is rough and itchy against your skin. The tennis ball is not scratchy. A bouncy object will bounce back from the floor if you drop it. Both objects are bouncy. The property that both objects have in common is bouncy.
train/2803	Which of these states is farthest north?	[ "Mississippi", "Maine", "Texas", "Pennsylvania" ]	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. Maine is farthest north.
train/2804	Which animal's mouth is also adapted to tear through meat?	[ "aardvark", "leopard" ]	1	are carnivores, or meat eaters. They eat small mammals and birds. The lynx's mouth is adapted to tear through meat. Figure: Eurasian lynx.	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 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 Eurasian lynx. The Eurasian lynx has a large mouth and sharp teeth. Its mouth is adapted to tear through meat. The Eurasian lynx 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 ...
train/2805	Which animal is also adapted to be camouflaged in the snow?	[ "snowy owl", "skunk" ]	0	es live in the cold Arctic tundra. The is adapted to be camouflaged in the snow. Figure: Arctic fox.	closed choice	grade5	natural science	biology	Adaptations	Animal adaptations: skins and body coverings	An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal...	Look at the picture of the Arctic fox. During the winter, the Arctic fox has white fur covering its body. It is adapted to be camouflaged in the snow. The word camouflage means to blend in. Now look at each animal. Figure out which animal has a similar adaptation. The snowy owl has white feathers covering its body. It ...
train/2806	Think about the magnetic force between the magnets in each pair. Which of the following statements is true?	[ "The magnitude of the magnetic force is greater in Pair 1.", "The magnitude of the magnetic force is greater in Pair 2.", "The magnitude of the magnetic force is the same in both pairs." ]	1	The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes.	closed choice	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 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. Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ...
train/2807	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...	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/2808	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 1.", "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	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,...	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/2809	Think about the magnetic force between the magnets in each pair. Which of the following statements is true?	[ "The strength of the magnetic force is the same in both pairs.", "The magnetic force is stronger in Pair 2.", "The magnetic force is stronger in Pair 1." ]	2	The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material.	closed choice	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 1 are closer together than the magnets in Pair 2. So, the magnetic force is stronger in Pair 1 than in Pair 2.
train/2810	Which of these cities is marked on the map?	[ "Memphis", "Miami", "Oklahoma City", "San Antonio" ]	3		closed choice	grade4	social science	geography	Cities	Cities of the Southeast		The city is San Antonio, Texas. Oklahoma City, Miami, and Memphis are marked with gray circles on the map below.
train/2811	What is the capital of Maryland?	[ "Annapolis", "Montpelier", "Harrisburg", "Baltimore" ]	0		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Northeast		Annapolis is the capital of Maryland.
train/2812	What is the probability that a cat produced by this cross will have straight fur?	[ "0/4", "4/4", "3/4", "1/4", "2/4" ]	1	In a group of cats, some individuals have straight fur and others have curly fur. In this group, the gene for the fur type trait has two alleles. The allele for curly fur (f) is recessive to the allele for straight fur (F). This Punnett square shows a cross between two cats.	closed choice	grade8	natural science	biology	Genes to traits	Use Punnett squares to calculate probabilities of offspring types	Offspring phenotypes: dominant or recessive? How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a...
train/2813	What is the capital of North Dakota?	[ "Lincoln", "Fargo", "Madison", "Bismarck" ]	3		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Midwest		Bismarck is the capital of North Dakota.
train/2814	Which country is highlighted?	[ "Australia", "Papua New Guinea", "Tonga", "Samoa" ]	3		closed choice	grade7	social science	geography	Oceania: geography	Identify and select countries of Oceania		This country is Samoa.
train/2815	Is a robot a solid, a liquid, or a gas?	[ "a liquid", "a gas", "a solid" ]	2		closed choice	grade3	natural science	physics	States of matter	Classify matter as solid, liquid, or gas	Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms. When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own. Some solids can be easily folded, bent, or broken. A piece of paper is a...	A robot is a solid. A solid has a size and shape of its own. A robot can move. But if it moves across a room, the robot will still have a size and shape of its own.
train/2816	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" ]	1	The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles.	closed choice	grade6	natural science	physics	Particle motion and energy	Identify how particle motion affects temperature and pressure	The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance. The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of...	The particles in both samples have the same average speed, but each particle in sample 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/2817	Which of these continents does the equator intersect?	[ "Europe", "Asia", "Antarctica" ]	1		closed choice	grade4	social science	geography	Maps	Use lines of latitude and longitude	Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps. Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit...	The equator is the line at 0° latitude. It intersects Asia. It does not intersect Antarctica or Europe.
train/2818	Which country is highlighted?	[ "Trinidad and Tobago", "Jamaica", "Haiti", "Cuba" ]	1		closed choice	grade6	social science	geography	The Americas: geography	Identify and select countries of the Caribbean		This country is Jamaica.
train/2819	Which specific humidity level was measured within the outlined area shown?	[ "14 grams of water vapor per kilogram of air", "11 grams of water vapor per kilogram of air", "22 grams of water vapor per kilogram of air" ]	2	The map below shows humidity in the lower atmosphere on August 1, 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 South America on that day. Look at the map. Then, answer the question below. Data source: United ...	closed choice	grade7	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 18 and 24 grams of water vapor per kilogram of air. 22 grams of water vapor per kilogram...
train/2820	Which animal's mouth is also adapted to tear through meat?	[ "pronghorn", "cougar" ]	1	are carnivores, or meat eaters. They eat small mammals and birds. The lynx's mouth is adapted to tear through meat. Figure: Eurasian lynx.	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 Eurasian lynx. The Eurasian lynx has a large mouth and sharp teeth. Its mouth is adapted to tear through meat. The Eurasian lynx 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 ...
train/2821	Which rhetorical appeal is primarily used in this ad?	[ "ethos (character)", "pathos (emotion)", "logos (reason)" ]	2		closed choice	grade12	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 the writer or speaker as trustworthy, authoritative, or sharing important values with the audience. An ad that appe...	The ad appeals to logos, or reason, by citing research to show that the advertised toothpaste is highly effective.
train/2822	What is the capital of Rhode Island?	[ "Newport", "Topeka", "Boston", "Providence" ]	3		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the Northeast		Providence is the capital of Rhode Island.
train/2823	Will these magnets attract or repel each other?	[ "repel", "attract" ]	0	Two magnets are placed as shown.	closed choice	grade5	natural science	physics	Magnets	Identify magnets that attract or repel	Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces. Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (...	To predict if these magnets will attract or repel, look at which poles are closest to each other. The north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other.
train/2824	Which of these oceans does the prime meridian intersect?	[ "the Indian Ocean", "the Pacific Ocean", "the Arctic Ocean" ]	2		closed choice	grade4	social science	geography	Maps	Use lines of latitude and longitude	Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps. Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit...	The prime meridian is the line at 0° longitude. It intersects the Arctic Ocean. It does not intersect the Pacific Ocean or the Indian Ocean.
train/2825	What is the capital of Illinois?	[ "Denver", "Bismarck", "Chicago", "Springfield" ]	3		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the Midwest		Springfield is the capital of Illinois.
train/2826	Which of these continents does the equator intersect?	[ "Antarctica", "North America", "Africa" ]	2		closed choice	grade4	social science	geography	Maps	Use lines of latitude and longitude	Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps. Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit...	The equator is the line at 0° latitude. It intersects Africa. It does not intersect North America or Antarctica.
train/2827	Which of these organisms contains matter that was once part of the persimmon tree?	[ "gray fox", "silver maple", "beaver" ]	0	Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia. A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem.	closed choice	grade8	natural science	biology	Ecological interactions	Interpret food webs II	A food web is a model. A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho...	Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows that starts from the persimmon tree. The only arrow pointing to the beaver starts from the silver maple. The silver maple does not have an arrow pointing to it. So, in this food web, matter does not mov...
train/2828	Is milk a solid or a liquid?	[ "a solid", "a liquid" ]	1		closed choice	grade2	natural science	physics	States of matter	Classify matter as solid or liquid	Solid and liquid are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms. When matter is a solid, it has a shape of its own. Some solids can be bent or broken easily. Others are hard to bend or break. A glass cup is a solid. A sock is also a solid. When matter is a li...	Milk is a liquid. A liquid takes the shape of any container it is in. If you pour milk into a different container, the milk will take the shape of that container. But the milk will still take up the same amount of space.
train/2829	Which country is highlighted?	[ "New Zealand", "Papua New Guinea", "Palau", "Australia" ]	0		closed choice	grade8	social science	geography	Oceania: geography	Identify and select countries of Oceania		This country is New Zealand.
train/2830	Which month is the coolest on average in Detroit?	[ "November and December", "January and February", "June and July" ]	1	Use the graph to answer the question below.	closed choice	grade4	natural science	earth-science	Weather and climate	Use climate data to make predictions	Scientists record climate data from places around the world. Temperature is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average temperature for each month. The average temperature can be used to describe the climate of a location. A line graph can be used t...	To describe the average temperature trends in Detroit, look at the graph. Choice "Feb" is incorrect. Choice "Jun" is incorrect. Choice "Jul" is incorrect. Choice "Nov" is incorrect. Choice "Dec" is incorrect. Choice "Jan" is incorrect. The average temperatures in January and February are between 25°F and 30°F. These mo...
train/2831	Is an arrowhead a solid, a liquid, or a gas?	[ "a liquid", "a gas", "a solid" ]	2		closed choice	grade3	natural science	physics	States of matter	Classify matter as solid, liquid, or gas	Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms. When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own. Some solids can be easily folded, bent, or broken. A piece of paper is a...	An arrowhead is a solid. A solid has a size and shape of its own. An arrowhead is made of rock.
train/2832	What can Ezra and Charlotte trade to each get what they want?	[ "Charlotte can trade her almonds for Ezra's tomatoes.", "Charlotte can trade her broccoli for Ezra's oranges.", "Ezra can trade his tomatoes for Charlotte's broccoli.", "Ezra can trade his tomatoes for Charlotte's sandwich." ]	2	Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another. Ezra and Charlotte open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Ezra wanted ...	closed choice	grade6	social science	economics	Basic economic principles	Trade and specialization		Ezra wanted broccoli in his lunch and Charlotte was hoping for tomatoes. Look at the labeled part of the images. Ezra has tomatoes. Charlotte 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/2833	Does this passage describe the weather or the climate?	[ "weather", "climate" ]	0	Figure: Istanbul. The streets of Istanbul are often filled with people during the summer festivals. The temperature dropped quickly as the sun set over Istanbul on the night of the art festival. Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain plac...	closed choice	grade6	natural science	earth-science	Weather and climate	Weather and climate around the world	The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere. Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day. Climate is the pattern of ...	Read the passage carefully. The streets of Istanbul are often filled with people during the summer festivals. The temperature dropped quickly as the sun set over Istanbul on the night of the art festival. The underlined part of the passage tells you about the temperature in Istanbul on a summer night. This passage desc...
train/2834	In this food web, which organism contains matter that eventually moves to the bat star?	[ "sea otter", "plainfin midshipman", "sea urchin" ]	1	Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California. 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 II	A food web is a model. A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho...	Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows to the bat star. The only arrow pointing from the sea otter leads to the orca. The only arrow pointing from the orca leads to the sea cucumber. No arrows point from the sea cucumber to any other organis...
train/2835	What is the capital of Virginia?	[ "Norfolk", "Arlington", "Montgomery", "Richmond" ]	3		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Southeast		Richmond is the capital of Virginia.
train/2836	Which statement is true about the average monthly precipitation in Nairobi?	[ "More precipitation falls in April than in August.", "Nairobi gets about the same amount of precipitation each month.", "February is the wettest month of the year." ]	0	Use the graph to answer the question below.	closed choice	grade4	natural science	earth-science	Weather and climate	Use climate data to make predictions	Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average precipitation for each month. The average precipitation can be used to describe the climate of a location. A...	To describe the average precipitation trends in Nairobi, look at the graph. Choice "Feb" is incorrect. Choice "Apr" is incorrect. Choice "Aug" is incorrect. Choice "More precipitation falls in April than in August." is incorrect. April has a higher average monthly precipitation than August. Choice "February is the wett...
train/2837	Can Daphnia pulex cells make their own food?	[ "no", "yes" ]	0	This organism is Daphnia pulex. It is a member of the animal kingdom. Daphnia pulex lives in lakes and ponds. D. pulex can sense chemicals that its predators release into the water. When D. pulex senses that a predator is nearby, it can grow sharp spikes on its head! These spikes make D. pulex harder to eat.	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...	Daphnia pulex is an animal. Animal cells cannot make their own food. Animals get their food by digesting other organisms.
train/2838	Which property matches this object?	[ "sour", "salty" ]	1	Select the better answer.	closed choice	grade3	natural science	physics	Materials	Identify properties of an object	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.	Look at the object. Think about each property. A lemon has a sour taste. The fries are not sour. Potato chips have a salty taste. The fries are salty.
train/2839	Which property do these three objects have in common?	[ "blue", "sour", "salty" ]	2	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. Potato chips have a salty taste. All three objects are salty. Blue is a color. This color is blue. The cracker and the fries are not blue. A lemon has a sour taste. None of the objects are sour. The property that all three objects have in common is s...
train/2840	What is the capital of Vermont?	[ "Billings", "Burlington", "Montpelier", "New York City" ]	2		closed choice	grade5	social science	geography	State capitals	Identify state capitals of the Northeast		Montpelier is the capital of Vermont.
train/2841	Select the organism in the same species as the brown pelican.	[ "Pelecanus occidentalis", "Ardea cocoi", "Strix uralensis" ]	0	This organism is a brown pelican. Its scientific name is Pelecanus occidentalis.	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 brown pelican's scientific name is Pelecanus occidentalis. Pelecanus occidentalis has the same scientific name as a brown pelican. So, these organisms are in the same species. Ardea cocoi does not have the same scientific name as a brown pelican. So, Pelecanus occidentalis and Ardea cocoi are not in the same species....
train/2842	Which of these states is farthest west?	[ "New York", "Maryland", "North Carolina", "Kentucky" ]	3		closed choice	grade5	social science	geography	Maps	Read a map: cardinal directions	Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west. A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction. The north arrow points to the North Pole. On most maps, north...	To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Kentucky is farthest west.
train/2843	Look at the models of molecules below. Select the elementary substance.	[ "cyclooctasulfur", "hydrazine", "cyclopropane" ]	0		closed choice	grade6	natural science	chemistry	Atoms and molecules	Identify elementary substances and compounds using models	There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you. A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ...
train/2844	Which i in column 1?	[ "the fire department", "the police department", "the gas station", "the school" ]	2		closed choice	grade2	social science	geography	Geography	Use a letter-number grid	A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map. A row is a line of squares that goes from side to side. Rows are marked with letters. A column is a line of squares that goes up and down. Columns are marked with numbers.	The gas station is in column 1.
train/2845	What can Kristen and Brendan trade to each get what they want?	[ "Kristen can trade her tomatoes for Brendan's carrots.", "Kristen can trade her tomatoes for Brendan's broccoli.", "Brendan can trade his almonds for Kristen's tomatoes.", "Brendan can trade his broccoli for Kristen'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. Kristen and Brendan open their lunch boxes in the school cafeteria. Neither Kristen nor Brendan got everything that they wanted. ...	closed choice	grade7	social science	economics	Basic economic principles	Trade and specialization		Look at the table and images. Kristen wants broccoli. Brendan 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/2846	What is the capital of Nevada?	[ "Frankfort", "Carson City", "Helena", "Denver" ]	1		closed choice	grade5	social science	geography	State capitals	Identify the 50 state capitals		Carson City is the capital of Nevada.
train/2847	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." ]	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.	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 larger the magnets, the greater the magnitude of the magnetic force between them. Magnet A is the same size in both pairs. But Magnet B is larger in Pair 2 than in Pair 1. So, the magnitud...
train/2848	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" ]	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	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 the two samples has the same mass, but the particles in sample A 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 kinetic energy, sampl...
train/2849	What is the capital of Hawaii?	[ "Hilo", "Juneau", "Albany", "Honolulu" ]	3		closed choice	grade4	social science	geography	State capitals	Identify the 50 state capitals		Honolulu is the capital of Hawaii.
train/2850	Which solution has a higher concentration of green particles?	[ "neither; their concentrations are the same", "Solution A", "Solution B" ]	1	The diagram below is a model of two solutions. Each green 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 green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container. Use the concentration formula to find the number of green particles per millilit...
train/2851	Which of the following could Isaiah's test show?	[ "which design would have the least traffic noise in the concert area", "if at least 20% of the park would be shaded by trees in each design", "which design would have the greatest distance between the concert area and the road" ]	2	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques...	closed choice	grade8	natural science	science-and-engineering-practices	Engineering practices	Evaluate tests of engineering-design solutions	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured. Imagine an engineer needs to design a...
train/2852	Identify the question that Harold's experiment can best answer.	[ "Do bananas develop more brown spots when they are kept at room temperature compared to in a cold refrigerator?", "Do bananas develop more brown spots if they are kept in bags with holes compared to bags without holes?" ]	1	The passage below describes an experiment. Read the passage and then follow the instructions below. Harold 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, Harold ...	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/2853	What is the capital of Rhode Island?	[ "Albany", "Providence", "Newport", "Cincinnati" ]	1		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the Northeast		Providence is the capital of Rhode Island.
train/2854	Which is this organism's common name?	[ "Agalychnis callidryas", "red-eyed tree frog" ]	1	This organism is a red-eyed tree frog. It is also called Agalychnis callidryas.	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,...	Agalychnis callidryas is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name. Agalychnis callidryas is the organism's scientific name. So, you know that red-eyed tree frog is the common name.
train/2855	Select the organism in the same genus as the common kestrel.	[ "Bubo scandiacus", "Ardea alba", "Falco tinnunculus" ]	2	This organism is a common kestrel. Its scientific name is Falco tinnunculus.	closed choice	grade8	natural science	biology	Classification and scientific names	Use scientific names to classify organisms	Scientists use scientific names to identify organisms. Scientific names are made of two words. The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits. A genus is made up of one or more species. A species is a group of very similar organisms...	A common kestrel's scientific name is Falco tinnunculus. The first word of its scientific name is Falco. This organism and the common kestrel are in the same genus and the same species! Both organisms have the same scientific name, Falco tinnunculus. Bubo scandiacus is in the genus Bubo. The first word of its scientifi...
train/2856	What is the capital of New Hampshire?	[ "Manchester", "Dover", "Concord", "Annapolis" ]	2		closed choice	grade5	social science	geography	State capitals	Identify state capitals of the Northeast		Concord is the capital of New Hampshire.
train/2857	Select the organism in the same species as the Ural owl.	[ "Pelecanus erythrorhynchos", "Ardea cinerea", "Strix uralensis" ]	2	This organism is a Ural owl. Its scientific name is Strix uralensis.	closed choice	grade8	natural science	biology	Classification and scientific names	Use scientific names to classify organisms	Scientists use scientific names to identify organisms. Scientific names are made of two words. The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits. A genus is made up of one or more species. A species is a group of very similar organisms...	A Ural owl's scientific name is Strix uralensis. Pelecanus erythrorhynchos does not have the same scientific name as a Ural owl. So, Strix uralensis and Pelecanus erythrorhynchos are not in the same species. Ardea cinerea does not have the same scientific name as a Ural owl. So, Strix uralensis and Ardea cinerea are no...
train/2858	What is the capital of Nebraska?	[ "Bismarck", "Omaha", "Lincoln", "Saint Paul" ]	2		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Midwest		Lincoln is the capital of Nebraska.
train/2859	What is the name of the colony shown?	[ "Maryland", "North Carolina", "Georgia", "South Carolina" ]	1		closed choice	grade5	social science	us-history	English colonies in North America	Identify the Thirteen Colonies		The colony is North Carolina.
train/2860	Which term matches the picture?	[ "fracture", "cleavage" ]	1	Read the text. "Cleavage" and "fracture" refer to the different ways that minerals can break. Cleavage occurs when a mineral breaks and forms flat planes or surfaces. These surfaces are smooth and often reflective. Minerals break cleanly along cleavage planes because there are weak points in the mineral's structure. Wh...	closed choice	grade6	language science	vocabulary	Context clues	Determine the meaning of domain-specific words with pictures		Cleavage occurs when a break produces smooth, shiny planes.
train/2861	Which material is this milk carton made of?	[ "concrete", "plastic" ]	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 milk carton. The milk carton is made of plastic. Some milk cartons are made of cardboard that is covered with wax. The wax keeps the milk from soaking into the cardboard.
train/2862	Select the organism in the same species as the Amazon tree boa.	[ "Corallus hortulanus", "Python bivittatus", "Lacerta agilis" ]	0	This organism is an Amazon tree boa. Its scientific name is Corallus hortulanus.	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...	An Amazon tree boa's scientific name is Corallus hortulanus. Lacerta agilis does not have the same scientific name as an Amazon tree boa. So, Corallus hortulanus and Lacerta agilis are not in the same species. Python bivittatus does not have the same scientific name as an Amazon tree boa. So, Corallus hortulanus and Py...
train/2863	Which ocean is highlighted?	[ "the Southern Ocean", "the Indian Ocean", "the Arctic Ocean", "the Atlantic Ocean" ]	1		closed choice	grade8	social science	geography	Physical Geography	Oceans and continents	Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean.	This is the Indian Ocean.
train/2864	What is the name of the colony shown?	[ "Massachusetts", "Connecticut", "New York", "Kentucky" ]	0		closed choice	grade7	social science	us-history	Colonial America	Identify the Thirteen Colonies		The colony is Massachusetts. The Massachusetts Colony included land that would later become the state of Maine. Maine was never its own colony.
train/2865	Which material is this tile made of?	[ "clay", "cardboard" ]	0		closed choice	grade3	natural science	physics	Materials	Identify materials in objects	A material is a type of matter. Wood, glass, metal, and plastic are common materials.	Look at the picture of the tile. The tile is made of clay. This tile is made of a type of clay called terra cotta. Terra cotta tiles have a brownish-red color. Terra cotta means "baked earth" in Italian.
train/2866	Identify the question that Jeanette's experiment can best answer.	[ "Do the insides of white boxes get hotter than the insides of black boxes when the boxes are left in the sun?", "Do the temperatures inside boxes depend on the sizes of the boxes?" ]	0	The passage below describes an experiment. Read the passage and then follow the instructions below. Jeanette glued lids onto 16 cardboard shoe boxes of equal size. She painted eight of the boxes black and eight of the boxes white. Jeanette made a small hole in the side of each box and then stuck a thermometer partiall...	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/2867	What is the expected ratio of offspring that have Thomsen disease to offspring that do not have Thomsen disease? Choose the most likely ratio.	[ "2:2", "1:3", "3:1", "4:0", "0:4" ]	0	This passage describes the Thomsen disease trait in humans: Thomsen disease is a condition that causes temporary muscle stiffness. When a human with Thomsen disease first contracts a resting muscle, the muscle is slow to relax and may stay contracted for a while. But after repeated use, the muscle can contract and rela...	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 Thomsen disease, consider whether each phenotype is the dominant or recessive allele's version of the Thomsen disease trait. The question tells you that the M allele, which is for having Thomsen disease, is dominant over the m ...
train/2868	Which of the following organisms is the decomposer in this food web?	[ "beaver", "gray fox", "persimmon tree", "parasol fungus" ]	3	Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia. A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem.	closed choice	grade7	natural science	biology	Ecological interactions	Interpret food webs I	A food web is a model. A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho...	Decomposers help break down dead organisms into simpler matter, such as nutrients. These nutrients can then help plants and other organisms grow. In a food web, there is an arrow pointing from another organism to a decomposer. There are no arrows pointing from a decomposer to another organism. The bolete fungus does no...
train/2869	Is popcorn a solid, a liquid, or a gas?	[ "a gas", "a solid", "a liquid" ]	1		closed choice	grade4	natural science	physics	States of matter	Identify and sort solids, liquids, and gases	Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms. When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own. Some solids can be easily folded, bent, or broken. A piece of paper is a...	Popcorn is a solid. You can tear a piece of popcorn into smaller pieces. But each smaller piece will still have a size and shape of its own.
train/2870	Will these magnets attract or repel each other?	[ "repel", "attract" ]	0	Two magnets are placed as shown.	closed choice	grade5	natural science	physics	Magnets	Identify magnets that attract or repel	Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces. Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (...	To predict if these magnets will attract or repel, look at which poles are closest to each other. The south pole of one magnet is closest to the south pole of the other magnet. Like poles repel. So, these magnets will repel each other.
train/2871	Think about the magnetic force between the magnets in each pair. Which of the following statements is true?	[ "The magnitude of the magnetic force is smaller in Pair 2.", "The magnitude of the magnetic force is smaller in Pair 1.", "The magnitude of the magnetic force is the same in both pairs." ]	2	The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material.	closed choice	grade6	natural science	physics	Velocity, acceleration, and forces	Compare magnitudes of magnetic forces	Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,...	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/2872	Which of these continents does the equator intersect?	[ "Europe", "Australia", "Africa" ]	2		closed choice	grade4	social science	geography	Maps	Use lines of latitude and longitude	Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps. Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit...	The equator is the line at 0° latitude. It intersects Africa. It does not intersect Europe or Australia.
train/2873	Which of these states is farthest east?	[ "Georgia", "Texas", "Nevada", "Illinois" ]	0		closed choice	grade3	social science	geography	Geography	Read a map: cardinal directions	Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west. A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction. The north arrow points to the North Pole. On most maps, north...	To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Georgia is farthest east.
train/2874	Which animal's mouth is also adapted to eat plant matter?	[ "pronghorn", "Nile crocodile" ]	0	Impalas are herbivores, or plant eaters. They eat grass and leaves. The 's mouth is adapted to grind up and eat plant matter. Figure: impala.	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 impala. The impala has long jaws and flat teeth. Its mouth is adapted to eat plant matter. The long jaws can help the impala reach leaves and grass. The flat teeth can help it cut and grind up the food into soft pieces it can swallow. Now look at each animal. Figure out which animal has a sim...
train/2875	Which animal's feet are also adapted for swimming?	[ "California gull", "New Zealand falcon" ]	0	Black-bellied whistling ducks live near lakes and streams in North America. They find most of their food in shallow water. The feet of the are adapted for swimming. Figure: black-bellied whistling duck.	closed choice	grade3	natural science	biology	Adaptations	Animal adaptations: feet and limbs	An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. The shape of an animal's feet is one example of an adaptation. Animals' feet can be adapted in different ways. For example, webbed feet might help an animal swim. Feet with thick fur m...	Look at the picture of the black-bellied whistling duck. The black-bellied whistling duck has webbed feet. Its feet are adapted for swimming. As it swims, the black-bellied whistling duck uses its webbed feet to push itself through water. Now look at each animal. Figure out which animal has a similar adaptation. The Ca...
train/2876	What is the capital of New Jersey?	[ "Wichita", "Trenton", "Knoxville", "Providence" ]	1		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Northeast		Trenton is the capital of New Jersey.
train/2877	Which term matches the picture?	[ "convex lens", "concave lens" ]	0	Read the text. The shape of a lens determines how it bends light that passes through it. A concave lens, for example, is thinner in the center than it is at the edges. This results in light rays diverging, or bending away from one another, after passing through. Concave lenses are used in TV projectors to spread out li...	closed choice	grade6	language science	vocabulary	Context clues	Determine the meaning of domain-specific words with pictures		A magnifying glass has a convex lens, which helps make objects look larger when placed close enough.
train/2878	Which statement is true about seeds?	[ "A plant's flowers make seeds.", "A plant's fruit makes seeds." ]	0	A tomato plant can grow seeds.	closed choice	grade4	natural science	biology	Plants	Describe and construct flowering plant life cycles	Many plants have flowers. These plants can use their flowers to reproduce, or make new plants like themselves. How do plants use their flowers to reproduce? First, the male part of the flower makes pollen, and the female part makes eggs. Animals, wind, or water can move pollen. Pollination is what happens when pollen i...	Flowers make seeds. After a flower is pollinated, male cells from the pollen combine with eggs. This is called fertilization. The fertilized eggs grow into seeds. The fruit can grow around the seeds. But the fruit does not make seeds. Both the fruit and the seeds grow from parts of the flower.
train/2879	Is Sequoia sempervirens made up of many cells?	[ "no", "yes" ]	1	This organism is Sequoia sempervirens. It is a member of the plant kingdom. Sequoia sempervirens is commonly called a coast redwood. The tallest known tree in the world is a coast redwood tree. It is 379 feet tall and over 700 years old!	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...	Sequoia sempervirens is a plant. Plants are made up of many cells.
train/2880	Select the fish below.	[ "cobra", "tortoise", "sea turtle", "seahorse" ]	3	Fish live underwater. They have fins, not limbs. Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment. A Banggai cardinalfish is an example of a fish.	closed choice	grade4	natural science	biology	Classification	Identify mammals, birds, fish, reptiles, and amphibians	Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification. Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals.	A seahorse is a fish. It lives underwater. It has fins, not limbs. Seahorses live in shallow, warm water. They can use their tails to hold on to plants. A tortoise is a reptile. It has scaly, waterproof skin. A tortoise's shell protects it from predators. When a tortoise feels threatened, it can pull its head and legs ...
train/2881	Is corundum a mineral?	[ "no", "yes" ]	1	Corundum has the following properties: pure substance naturally occurring solid fixed crystal structure not made by living things	yes or no	grade6	natural science	earth-science	Rocks and minerals	Identify rocks and minerals	Properties are used to identify different substances. Minerals have the following properties: It is a solid. It is formed in nature. It is not made by organisms. It is a pure substance. It has a fixed crystal structure. If a substance has all five of these properties, then it is a mineral. Look closely at the last thre...	Corundum has all the properties of a mineral. So, corundum is a mineral.
train/2882	Why do people come to Panjin Red Beach?	[ "to eat the seepweed", "to see its color" ]	1	Read the passage about Panjin Red Beach. Panjin Red Beach is in China. For most of the year, the beach is green. But in the fall, it turns bright red! People come from all over to see the beautiful red color. The beach looks red because it is covered in a plant called seepweed. Many plants cannot live so close to the s...	closed choice	grade2	language science	reading-comprehension	Independent reading comprehension	Read and understand informational passages		Look at the passage. It tells you why people come to Panjin Red Beach. Panjin Red Beach is in China. For most of the year, the beach is green. But in the fall, it turns bright red! People come from all over to see the beautiful red color.
train/2883	Select the organism in the same genus as the green tree frog.	[ "Hyla japonica", "Ardea cinerea", "Cyanocitta cristata" ]	0	This organism is a green tree frog. Its scientific name is Hyla cinerea.	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 green tree frog's scientific name is Hyla cinerea. The first word of its scientific name is Hyla. Ardea cinerea and Hyla cinerea are not in the same genus. These organisms are not in the same genus, but part of their scientific names is the same. Ardea cinerea and Hyla cinerea have the same species name within their ...
train/2884	Which country is highlighted?	[ "Solomon Islands", "Samoa", "New Zealand", "Australia" ]	3		closed choice	grade8	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/2885	After the Akkadian Empire ended, many cities and empires tried to control Mesopotamia. Around the 1790s BCE, which empire started controlling Mesopotamia?	[ "the Neo-Sumerian Empire", "the Elamite Empire", "the Babylonian Empire", "the Akkadian Empire" ]	2	Look at the table. Then answer the question below.	closed choice	grade6	social science	world-history	Ancient Mesopotamia	Mesopotamian empires		Look at the table. The abbreviation "ca." stands for the Latin word, circa. Circa means "about." It indicates when a date is estimated. So, around 1792 BCE, the Babylonian Empire started controlling Mesopotamia. The Babylonian (ba-bih-LOH-nee-in) Empire came after the Akkadian and Neo-Sumerian empires. The capital of t...
train/2886	Which of these cities is marked on the map?	[ "Austin", "Memphis", "Houston", "Nashville" ]	0		closed choice	grade4	social science	geography	Cities	Cities of the Southeast		The city is Austin, Texas. Houston, Memphis, and Nashville are marked with gray circles on the map below.
train/2887	Which of these continents does the prime meridian intersect?	[ "South America", "Antarctica", "Australia" ]	1		closed choice	grade4	social science	geography	Maps	Use lines of latitude and longitude	Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps. Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit...	The prime meridian is the line at 0° longitude. It intersects Antarctica. It does not intersect South America or Australia.
train/2888	Which of these states is farthest north?	[ "Kansas", "New Mexico", "Kentucky", "New Jersey" ]	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. New Jersey is farthest north.
train/2889	Which solution has a higher concentration of green particles?	[ "neither; their concentrations are the same", "Solution B", "Solution A" ]	1	The diagram below is a model of two solutions. Each green 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 green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container. Use the concentration formula to find the number of green particles per millilit...
train/2890	Identify the question that Franklin and Ronald's experiment can best answer.	[ "Do ping pong balls travel farther when launched from a 30° angle compared to a 45° angle?", "Do ping pong balls stop rolling along the ground sooner after being launched from a 30° angle or a 45° angle?" ]	0	The passage below describes an experiment. Read the passage and then follow the instructions below. Franklin placed a ping pong ball in a catapult, pulled the catapult's arm back to a 45° angle, and launched the ball. Then, Franklin launched another ping pong ball, this time pulling the catapult's arm back to a 30° an...	closed choice	grade8	natural science	science-and-engineering-practices	Designing experiments	Identify the experimental question	Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment. Imagine an experiment with two groups of daffodil plants. One group of plants was gr...
train/2891	Which animal's feet are also adapted for sticking to smooth surfaces?	[ "monitor lizard", "Mediterranean tree frog" ]	1	s live in the forests of Madagascar. They spend most of their lives in trees. The feet of the are adapted to stick to the smooth surfaces of leaves and stems. Figure: Madagascar day gecko.	closed choice	grade3	natural science	biology	Adaptations	Animal adaptations: feet and limbs	An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. 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 Madagascar day gecko. The Madagascar day gecko has wide, sticky toes. Its feet are adapted for sticking to smooth surfaces. The Madagascar day gecko 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 adaptati...
train/2892	Identify the question that Lauren's experiment can best answer.	[ "Do slugs weigh more after eating tomato leaves or broccoli leaves?", "Do slugs eat more from tomato leaves or broccoli leaves?" ]	1	The passage below describes an experiment. Read the passage and then follow the instructions below. Lauren cut tomato and broccoli plant leaves into one-inch squares. In each of 12 containers, she placed six leaf squares: three tomato-leaf squares and three broccoli-leaf squares. She put one slug from her garden into ...	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/2893	Select the organism in the same species as the lion's mane jellyfish.	[ "Aequorea victoria", "Cyanea capillata", "Aurelia aurita" ]	1	This organism is a lion's mane jellyfish. Its scientific name is Cyanea capillata.	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 lion's mane jellyfish's scientific name is Cyanea capillata. Aurelia aurita does not have the same scientific name as a lion's mane jellyfish. So, Cyanea capillata and Aurelia aurita are not in the same species. Aequorea victoria does not have the same scientific name as a lion's mane jellyfish. So, Cyanea capillata ...
train/2894	Which country is highlighted?	[ "Kiribati", "Australia", "New Zealand", "Papua New Guinea" ]	2		closed choice	grade7	social science	geography	Oceania: geography	Identify and select countries of Oceania		This country is New Zealand.
train/2895	Which animal is also adapted to be camouflaged among green leaves?	[ "green silver-line", "black widow spider" ]	0	Green mantises are insects found in tropical forests around the world. The is adapted to be camouflaged among green leaves. Figure: green mantis.	closed choice	grade5	natural science	biology	Adaptations	Animal adaptations: skins and body coverings	An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal...	Look at the picture of the green mantis. The green mantis has a green body. It is adapted to be camouflaged among green leaves. The word camouflage means to blend in. Now look at each animal. Figure out which animal has a similar adaptation. The green silver-line has a green body. It is adapted to be camouflaged among ...
train/2896	Which country is highlighted?	[ "Solomon Islands", "Tonga", "Tuvalu", "Samoa" ]	1		closed choice	grade7	social science	geography	Oceania: geography	Identify and select countries of Oceania		This country is Tonga.
train/2897	What is the name of the colony shown?	[ "Georgia", "Mississippi", "Illinois", "New York" ]	0		closed choice	grade4	social science	us-history	English colonies in North America	Identify the Thirteen Colonies		The colony is Georgia.
train/2898	Which country is highlighted?	[ "Grenada", "Cuba", "Jamaica", "Saint Vincent and the Grenadines" ]	2		closed choice	grade7	social science	geography	The Americas: geography	Identify and select countries of the Caribbean		This country is Jamaica.
train/2899	Select the organism in the same genus as the Japanese camellia.	[ "Camellia sasanqua", "Trametes versicolor", "Hyacinthus orientalis" ]	0	This organism is a Japanese camellia. Its scientific name is Camellia japonica.	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 Japanese camellia's scientific name is Camellia japonica. The first word of its scientific name is Camellia. Hyacinthus orientalis is in the genus Hyacinthus. The first word of its scientific name is Hyacinthus. So, Hyacinthus orientalis and Camellia japonica are not in the same genus. Trametes versicolor is in the g...

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