image
imagewidth (px)
53
760
question
stringlengths
17
259
choices
sequencelengths
2
5
answer
int64
0
4
hint
stringlengths
0
1.91k
task
stringclasses
3 values
grade
stringclasses
9 values
subject
stringclasses
3 values
topic
stringclasses
15 values
category
stringclasses
65 values
skill
stringclasses
115 values
lecture
stringclasses
106 values
solution
stringlengths
0
1.91k
Select the fish below.
[ "goldfish", "European green toad" ]
0
Fish live underwater. They have fins, not limbs. A manta ray is an example of a fish.
closed choice
grade3
natural science
biology
Classification
Identify mammals, birds, fish, reptiles, and amphibians
Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common. Scientists sort animals into groups based on traits they have in common. This process is called classification.
A European green toad is an amphibian. It has moist skin and begins its life in water. Toads do not have teeth! They swallow their food whole. A goldfish is a fish. It lives underwater. It has fins, not limbs. Goldfish are popular as pets in many countries today. They were first kept as pets by people in ancient China.
Which of these states is farthest east?
[ "Ohio", "New Jersey", "Kansas", "South Carolina" ]
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 is at the top of the map.
To find the answer, look at the compass rose. Look at which way the east arrow is pointing. New Jersey is farthest east.
Which country is highlighted?
[ "Barbados", "Saint Kitts and Nevis", "Jamaica", "Antigua and Barbuda" ]
3
closed choice
grade6
social science
geography
The Americas: geography
Identify and select countries of the Caribbean
This country is Antigua and Barbuda.
What is the capital of Washington?
[ "Orlando", "Spokane", "Seattle", "Olympia" ]
3
closed choice
grade3
social science
geography
State capitals
Identify state capitals of the West
Olympia is the capital of Washington.
Is the helium in balloons a solid, a liquid, or a gas?
[ "a gas", "a liquid", "a solid" ]
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 solid. Also, some solids are very small. A grain of sand is a solid. When matter is a liquid, it has a definite volume but not a definite shape. So, a liquid has a size of its own, but it does not have a shape of its own. Think about pouring juice from a bottle into a cup. The juice still takes up the same amount of space, but it takes the shape of the bottle. Some liquids are thicker than others. Honey and milk are both liquids. But pouring honey takes more time than pouring milk. When matter is a gas, it does not have a definite volume or a definite shape. A gas expands, or gets bigger, until it completely fills a space. A gas can also get smaller if it is squeezed into a smaller space. Many gases are invisible. The oxygen you breathe is a gas. The helium in a balloon is also a gas.
The helium in balloons is a gas. A gas expands to fill a space. The helium in balloons expands to fill all the space inside the balloons. If a balloon pops, the helium will expand to fill a much larger space.
Think about the magnetic force between the magnets in each pair. Which of the following statements is true?
[ "The magnitude of the magnetic force is greater in Pair 2.", "The magnitude of the magnetic force is greater in Pair 1.", "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
grade6
natural science
physics
Velocity, acceleration, and forces
Compare magnitudes of magnetic forces
Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets, the more strongly the magnets attract or repel each other. You can change the magnitude of a magnetic force between two magnets by using magnets of different sizes. The magnitude of the magnetic force is greater when the magnets are larger.
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. 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 1 than in Pair 2. So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2.
What is the capital of Texas?
[ "Dallas", "Austin", "Houston", "Jefferson City" ]
1
closed choice
grade3
social science
geography
State capitals
Identify state capitals of the Southeast
Austin is the capital of Texas.
Select the mammal below.
[ "rabbit", "red-eyed tree frog" ]
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 red-eyed tree frog is an amphibian. It has moist skin and begins its life in water. A rabbit is a mammal. It has fur and feeds its young milk.
Does this passage describe the weather or the climate?
[ "weather", "climate" ]
0
Figure: Croatia. It was clear and sunny yesterday on the Croatian coast. 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
grade4
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 weather in a certain place. For example, summer temperatures in New York are usually higher than winter temperatures.
Read the passage carefully. It was clear and sunny yesterday on the Croatian coast. This passage tells you about yesterday's cloud cover on the coast of Croatia. This passage describes the atmosphere at a certain place and time. So, this passage describes the weather.
Which state is highlighted?
[ "Ohio", "Indiana", "Michigan", "Iowa" ]
0
closed choice
grade5
social science
geography
States
Identify states of the Midwest
This state is Ohio.
Is chocolate syrup a solid, a liquid, or a gas?
[ "a gas", "a liquid", "a solid" ]
1
closed choice
grade3
natural science
physics
States of matter
Classify matter as solid, liquid, or gas
Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms. When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own. Some solids can be easily folded, bent, or broken. A piece of paper is a solid. Also, some solids are very small. A grain of sand is a solid. When matter is a liquid, it has a definite volume but not a definite shape. So, a liquid has a size of its own, but it does not have a shape of its own. Think about pouring juice from a bottle into a cup. The juice still takes up the same amount of space, but it takes the shape of the bottle. Some liquids do not pour as easily as others. Honey and milk are both liquids. But pouring honey takes more time than pouring milk. When matter is a gas, it does not have a definite volume or a definite shape. A gas expands, or gets bigger, until it completely fills a space. A gas can also get smaller if it is squeezed into a smaller space. Many gases are invisible. Air is a gas.
Chocolate syrup is a liquid. A liquid takes the shape of any container it is in. If you pour chocolate syrup into a container, the chocolate syrup will take the shape of that container. But the chocolate syrup will still take up the same amount of space.
Which country is highlighted?
[ "Antigua and Barbuda", "Saint Kitts and Nevis", "Grenada", "Saint Lucia" ]
1
closed choice
grade7
social science
geography
The Americas: geography
Identify and select countries of the Caribbean
This country is Saint Kitts and Nevis.
Which continent is highlighted?
[ "North America", "South America", "Antarctica", "Australia" ]
0
closed choice
grade3
social science
geography
Geography
Identify oceans and continents
A continent is one of the seven largest areas of land on earth.
This continent is North America.
Which continent is highlighted?
[ "Africa", "South America", "North America", "Asia" ]
1
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 South America.
Which of these states is farthest west?
[ "Alabama", "Illinois", "South Carolina", "Connecticut" ]
1
closed choice
grade3
social science
geography
Geography
Read a map: cardinal directions
Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west. A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction. The north arrow points to the North Pole. On most maps, north is at the top of the map.
To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Illinois is farthest west.
Which continent is highlighted?
[ "Asia", "Europe", "Australia", "North America" ]
1
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 Europe.
What is the direction of this push?
[ "away from the bulldozer", "toward the bulldozer" ]
0
A bulldozer clears a path for a new road. A force from the bulldozer pushes loose dirt out of the way.
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 bulldozer pushes the loose dirt. The direction of the push is away from the bulldozer.