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train/4700 | What is the capital of Wisconsin? | [
"Des Moines",
"Madison",
"Burlington",
"Pierre"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Madison is the capital of Wisconsin. | ||
train/4701 | Which ocean is highlighted? | [
"the Southern Ocean",
"the Indian Ocean",
"the Arctic Ocean",
"the Atlantic Ocean"
] | 3 | 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 Atlantic Ocean. | |
train/4702 | Which state is highlighted? | [
"Texas",
"Tennessee",
"Florida",
"Georgia"
] | 2 | closed choice | grade5 | social science | geography | States | Identify states of the Southeast | This state is Florida. | ||
train/4703 | Which term matches the picture? | [
"Hawaiian eruption",
"Strombolian eruption"
] | 1 | Read the text.
Volcanic eruptions are classified by their appearance and their behavior. During a Hawaiian eruption, for example, lava is ejected from the volcano in a column. These jets can last for several hours or for days. The lava that flows from this type of eruption can often travel for miles before cooling and ... | closed choice | grade8 | language science | word-study | Domain-specific vocabulary | Determine the meaning of domain-specific words with pictures | A Strombolian eruption has short, explosive bursts of lava. | |
train/4704 | Which property matches this object? | [
"hard",
"yellow"
] | 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 hard object does not change shape when pressed or squeezed. The rubber gloves are not hard.
Yellow is a color.
This color is yellow. The rubber gloves are yellow. |
train/4705 | Which bird's beak is also adapted to crack large, hard nuts? | [
"white-tipped sicklebill",
"African gray parrot"
] | 1 | Military macaws live in the forests of Central and South America. They eat large seeds and nuts. The shape of the 's beak is adapted to crack open large, hard nuts.
Figure: military macaw. | 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 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 military macaw.
The military macaw has a thick hooked beak. Its beak is adapted to crack large, hard nuts. The military macaw uses its thick beak to crack the shell of a nut by squeezing it. The hooked shape of the beak can help the bird hold the nut in place while cracking it.
Now look at ea... |
train/4706 | Is the following statement about our solar system true or false?
The smallest planet is made mainly of rock. | [
"false",
"true"
] | 1 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To decide which planet is the smallest, look at the volumes shown in the table and compare the exponents. Mercury's volume has an exponent of 10, which is the smallest out of all the planets.
Mercury is made mainly of rock. So, the smallest planet is made mainly of rock. |
train/4707 | Is the air moving through a flute a solid, a liquid, or a gas? | [
"a solid",
"a gas",
"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... | The air moving through a flute is a gas. A gas expands to fill a space.
The air in a flute expands to fill all the space inside the flute. When air leaves the flute, the air expands to fill a much larger space. | |
train/4708 | What can Pablo and Judith trade to each get what they want? | [
"Pablo can trade his tomatoes for Judith's broccoli.",
"Pablo can trade his tomatoes for Judith's carrots.",
"Judith can trade her almonds for Pablo's tomatoes.",
"Judith can trade her broccoli for Pablo's oranges."
] | 0 | 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.
Pablo and Judith open their lunch boxes in the school cafeteria. Neither Pablo nor Judith got everything that they wanted. The ta... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Pablo wants broccoli. Judith 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/4709 | Is a ring a solid, a liquid, or a gas? | [
"a solid",
"a liquid",
"a gas"
] | 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 ring is a solid. A solid has a size and shape of its own.
A ring keeps its shape, even when you take it off your finger. | |
train/4710 | Is galena a mineral or a rock? | [
"mineral",
"rock"
] | 0 | Galena has the following properties:
metallic luster
naturally occurring
not made by organisms
fixed crystal structure
solid
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... | Galena has all the properties of a mineral. So, galena is a mineral. |
train/4711 | Which month is the wettest on average in Cairo? | [
"September",
"January",
"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. 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 Cairo, look at the graph.
Choice "Jan" is incorrect.
Choice "Jul" is incorrect.
Choice "Sep" is incorrect.
January has an average monthly precipitation of about 15 millimeters. This is higher than in any other month. So, January is the wettest month on average. |
train/4712 | Which property do these three objects have in common? | [
"sweet",
"fuzzy",
"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. None of the objects are opaque.
A fuzzy object is covered in soft hair. The jello is not fuzzy.
Sugar has a sweet taste. All three objects are sweet.
The property that all three objects have in common is s... |
train/4713 | Which better describes the Cerrado ecosystem? | [
"It has year-round rain. It also has soil that is poor in nutrients.",
"It has warm winters. It also has a rainy season and a dry season."
] | 1 | Figure: Cerrado.
The Cerrado is a savanna grassland ecosystem in Brazil. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A savanna grassland is a type of ecosystem. Savanna grasslands have the following features: warm summers and warm winters, a rainy season and a dry season, and soil that is poor in nutrients. So, the Cerrado has warm winters. It also has a rainy season and a dry season. |
train/4714 | 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."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The 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/4715 | Which property matches this object? | [
"scratchy",
"sweet"
] | 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 scratchy object is rough and itchy against your skin. The peach is not scratchy.
Sugar has a sweet taste. The peach is sweet. |
train/4716 | What is the capital of Arizona? | [
"Springfield",
"Phoenix",
"Tucson",
"Portland"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Phoenix is the capital of Arizona. | ||
train/4717 | What is the capital of Georgia? | [
"Savannah",
"Nashville",
"Atlanta",
"Athens"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Atlanta is the capital of Georgia. | ||
train/4718 | In this experiment, which were part of an experimental group? | [
"the plants watered with tap water",
"the plants watered with greywater"
] | 1 | The passage below describes an experiment.
Nora wanted to find ways to save water. She learned that people can reuse greywater, which is water that has been used in sinks, tubs, and washing machines. She wondered if her plants would be less healthy if she watered them with greywater instead of tap water.
Nora placed e... | 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, Nora investigated whether watering plants with greywater affects the health of the plants. So, the plants watered with greywater were part of an experimental group.
The plants watered with tap water did not get greywater. So, they were not part of an experimental group. |
train/4719 | 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."
] | 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 | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | 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/4720 | Which type of force from the mom moves the stroller forward? | [
"pull",
"push"
] | 1 | A mom takes her baby for a walk. She applies a force to the baby's stroller to move it forward. | closed choice | grade3 | natural science | physics | Force and motion | Identify pushes and pulls | A force is a push or a pull that one object applies to a second object.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The mom applies a force to the stroller to move it forward. The direction of this force is away from the mom. This force is a push. |
train/4721 | What is the capital of New Jersey? | [
"Trenton",
"Fargo",
"Montpelier",
"Newark"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Trenton is the capital of New Jersey. | ||
train/4722 | Which of the following fossils is older? Select the more likely answer. | [
"mammal tooth",
"wood"
] | 1 | This diagram shows fossils in an undisturbed sedimentary rock sequence. | closed choice | grade8 | natural science | earth-science | Fossils | Compare ages of fossils in a rock sequence | A fossil is the preserved evidence of an ancient organism. Some fossils are formed from body parts such as bones or shells. Other fossils, such as footprints or burrows, are formed from traces of an organism's activities.
Fossils are typically found in sedimentary rocks. Sedimentary rocks usually form in layers. Over t... | Look again at the fossils in the rock sequence diagram.
Compare the positions of these fossils to determine which one is older:
The wood fossil is in a deeper layer in the rock sequence than the mammal tooth fossil. So, the wood fossil is most likely older than the mammal tooth fossil. |
train/4723 | Identify the question that Jackie'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.
Jackie glued lids onto 16 cardboard shoe boxes of equal size. She painted eight of the boxes black and eight of the boxes white. Jackie made a small hole in the side of each box and then stuck a thermometer partially in... | 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/4724 | Which animal is also adapted to be camouflaged among dead leaves? | [
"fantastic leaf-tailed gecko",
"fire salamander"
] | 0 | Orange oakleaf butterflies live in the forests of Asia. This butterfly is adapted to be camouflaged among dead leaves.
Figure: orange oakleaf butterfly. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the orange oakleaf butterfly.
The orange oakleaf butterfly has a brown leaf-shaped body. It is adapted to be camouflaged among dead leaves, which often have a reddish or brownish color. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptatio... |
train/4725 | Identify the question that Charlotte's experiment can best answer. | [
"Does linen fabric turn darker than cotton fabric when soaked in a mixture of black dye and water?",
"Does fabric turn darker when soaked in a mixture of black dye and water for 15 minutes compared to 30 minutes?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Charlotte prepared ten buckets, each with one gallon of boiling water and three tablespoons of black fabric dye. Charlotte soaked white linen fabric squares in five of the buckets, and white cotton fabric squares in the... | 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/4726 | What is the capital of New Jersey? | [
"Hartford",
"Trenton",
"Newark",
"Jersey City"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Trenton is the capital of New Jersey. | ||
train/4727 | Which country is highlighted? | [
"New Zealand",
"Tonga",
"Samoa",
"Tuvalu"
] | 2 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Samoa. | ||
train/4728 | Which of these states is farthest south? | [
"Connecticut",
"Alabama",
"Pennsylvania",
"Kentucky"
] | 1 | 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 south arrow is pointing. Alabama is farthest south. | |
train/4729 | What is the name of the colony shown? | [
"Virginia",
"Delaware",
"Maryland",
"Pennsylvania"
] | 1 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/4730 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in 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/4731 | Do moss plants produce seeds? | [
"yes",
"no"
] | 1 | This diagram shows the life cycle of a moss. | yes or no | grade7 | natural science | biology | Plant reproduction | Moss and fern life cycles | Moss plants reproduce using both asexual reproduction and sexual reproduction.
Moss plants use their male and female parts for sexual reproduction. The male parts produce sperm. Moss live in damp environments, and moss sperm can travel through water to the female parts.
The sperm fuse with eggs in the female part. This... | Moss plants do not produce seeds. Moss plants produce spores, eggs, and sperm. |
train/4732 | How are sloths able to hang on to trees? | [
"Their claws are like hooks.",
"Their fur is sticky."
] | 0 | Read the passage about sloths and algae.
Sloths spend most of their lives up in trees. Their long claws, shaped like hooks, help them hang on to the branches. Sloths eat and sleep in trees, sometimes hanging upside down.
Sloths don't move a whole lot. Sometimes algae, tiny green plants, grow on their fur. Algae can mak... | closed choice | grade2 | language science | reading-comprehension | Independent reading comprehension | Read and understand informational passages | Look at the passage. It tells you how sloths are able to hang on to trees.
Sloths spend most of their lives up in trees. Their long claws, shaped like hooks, help them hang on to the branches. Sloths eat and sleep in trees, sometimes hanging upside down. | |
train/4733 | Is the following statement about our solar system true or false?
Neptune's volume is more than 50 times as great as that of Earth. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade7 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | To determine if this statement is true, calculate the value of 50 times the volume of Earth.
Then compare the result to the volume of Neptune. The volume of Neptune is 62,530 billion km^3, which is more than 54,500 billion km^3. So, Neptune's volume is more than 50 times as great as that of Earth. |
train/4734 | What is the name of the colony shown? | [
"Maryland",
"New Hampshire",
"Mississippi",
"Virginia"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/4735 | What is the capital of Rhode Island? | [
"Newport",
"Harrisburg",
"Hartford",
"Providence"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Providence is the capital of Rhode Island. | ||
train/4736 | Which country is highlighted? | [
"Grenada",
"Saint Lucia",
"Haiti",
"Saint Kitts and Nevis"
] | 3 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Kitts and Nevis. | ||
train/4737 | Which state is highlighted? | [
"Idaho",
"Washington",
"Oregon",
"Hawaii"
] | 3 | closed choice | grade5 | social science | geography | States | Identify the 50 states | This state is Hawaii. | ||
train/4738 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 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 north pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. |
train/4739 | What is the capital of Mississippi? | [
"Biloxi",
"Jackson",
"Baton Rouge",
"Providence"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Jackson is the capital of Mississippi. | ||
train/4740 | What is the capital of Maryland? | [
"Augusta",
"Harrisburg",
"Annapolis",
"Newport"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | ||
train/4741 | Which property do these three objects have in common? | [
"transparent",
"hard",
"slippery"
] | 1 | 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.
You can see clearly through a transparent object. The magnifying glass is transparent, but the car bumper is not.
A slippery object is hard to hold onto or stand on. The diamond and the magnifying glass are not slippery.
A hard object does not change... |
train/4742 | Which animal's feet are also adapted for walking on large, floating leaves? | [
"European river otter",
"comb-crested jacana"
] | 1 | s live near rivers and lakes. They eat insects and snails that live on plants floating on the surface of the water.
The feet of the jacana are adapted for walking on large, floating leaves. The jacana uses its feet to spread its weight out over a wide area. This helps the bird walk on the leaves without sinking into th... | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
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 African jacana.
The African jacana uses its toes to spread its weight out over a large area. This can help it walk on leaves without sinking into the water.
Now look at each animal. Figure out which animal has a similar adaptation.
The comb-crested jacana has long, thin toes on its feet. Its ... |
train/4743 | Which country is highlighted? | [
"Saint Lucia",
"Barbados",
"Saint Vincent and the Grenadines",
"Antigua and Barbuda"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Lucia. | ||
train/4744 | Which country is highlighted? | [
"New Zealand",
"Kiribati",
"Nauru",
"Vanuatu"
] | 2 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Nauru. | ||
train/4745 | Select the organism in the same species as the pink skunk clownfish. | [
"Amphiprion perideraion",
"Ambystoma opacum",
"Amphiprion frenatus"
] | 0 | This organism is a pink skunk clownfish. Its scientific name is Amphiprion perideraion. | 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 pink skunk clownfish's scientific name is Amphiprion perideraion.
Amphiprion perideraion is in the same genus as Amphiprion frenatus, but they are not in the same species.
Organisms in the same species have the same scientific names. Amphiprion perideraion and Amphiprion frenatus are different species within the same... |
train/4746 | What can Troy and Jason trade to each get what they want? | [
"Troy can trade his tomatoes for Jason's broccoli.",
"Jason can trade his almonds for Troy's tomatoes.",
"Troy can trade his tomatoes for Jason's sandwich.",
"Jason can trade his broccoli for Troy's oranges."
] | 0 | 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.
Troy and Jason open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Troy wanted broc... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Troy wanted broccoli in his lunch and Jason was hoping for tomatoes. Look at the labeled part of the images.
Troy has tomatoes. Jason 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/4747 | 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 south pole of one magnet is closest to the north pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. |
train/4748 | What can Vicky and Oscar trade to each get what they want? | [
"Oscar can trade his broccoli for Vicky's oranges.",
"Vicky can trade her tomatoes for Oscar's sandwich.",
"Vicky can trade her tomatoes for Oscar's broccoli.",
"Oscar can trade his almonds for Vicky's tomatoes."
] | 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.
Vicky and Oscar open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Vicky wanted br... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Vicky wanted broccoli in her lunch and Oscar was hoping for tomatoes. Look at the labeled part of the images.
Vicky has tomatoes. Oscar 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/4749 | Based on the arrows, which of the following living things is a decomposer? | [
"phytoplankton",
"sea cucumber"
] | 1 | Below is a food web from an ocean ecosystem. The ecosystem is in Monterey Bay, off the coast of California.
A food web is a model that shows how the matter eaten by living things moves through an ecosystem. The arrows show how matter moves through the food web. | closed choice | grade3 | natural science | biology | Ecosystems | Interpret food webs | A food web is a model.
Models can make things in nature easier to understand. Models can be simpler than the things they represent. A food web is a model that shows where living things in an ecosystem get their food. If a food web showed every living thing in an ecosystem, the food web would be hard to understand. So, ... | Decomposers help break down dead living things into simpler matter, such as nutrients. These nutrients can then help plants and other living things grow. In a food web, there is an arrow pointing from another living thing to a decomposer. There are no arrows pointing from a decomposer to another living thing.
The phyto... |
train/4750 | What type of rock is granite? | [
"sedimentary",
"igneous",
"metamorphic"
] | 1 | Granite forms through the cooling of melted rock. It is made of minerals such as quartz and biotite. Quartz is a light-colored mineral, and biotite is a dark-colored mineral.
Here are two pieces of granite. Do you see the mineral grains in the two rocks? The darker rock has more biotite than the lighter rock. | 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 ... | Granite is an igneous rock. Like other igneous rocks, it forms when melted rock cools and hardens.
Melted rock below the earth's surface is called magma. Granite forms from a type of magma that is rich in silica. As the magma cools, minerals such as quartz, feldspar, and biotite begin to form. When the magma becomes so... |
train/4751 | Which of these states is farthest south? | [
"Oklahoma",
"South Dakota",
"Indiana",
"Utah"
] | 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 south arrow is pointing. Oklahoma is farthest south. | |
train/4752 | Which air temperature was measured within the outlined area shown? | [
"5°C",
"-13°C",
"-20°C"
] | 1 | The map below shows air temperatures in the lower atmosphere on November 12, 2015. The outlined area shows an air mass that influenced weather in Europe on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Laborat... | closed choice | grade6 | 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 air temperatures.
The map's legend tells you the temperature that each color represents. Colors on the left in the legend represent lower temperatures than colors on the right. For ... | Look at the colors shown within the outlined area. Then, use the legend to determine which air temperatures those colors represent.
15°C and 0°C.
-13°C is within this range.
-20°C and 5°C are outside of this range. |
train/4753 | Which rhetorical appeal is primarily used in this ad? | [
"pathos (emotion)",
"logos (reason)",
"ethos (character)"
] | 0 | 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 pathos, or emotion, by reminding readers of how important their dogs are to them. | |
train/4754 | 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 the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | 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,... | 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/4755 | Which of the following could Anne and Kimi's test show? | [
"if a new batch of concrete was firm enough to use",
"if the concrete from each batch took the same amount of time to dry"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade6 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/4756 | Which property do these three objects have in common? | [
"scratchy",
"sticky",
"blue"
] | 1 | 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 sticky object can attach or stick to other things. All three objects are sticky.
Blue is a color.
This color is blue. The ice pop and the bubble gum are not blue.
A scratchy object is rough and itchy against your skin. None of the objects are scrat... |
train/4757 | In this food chain, the European grayling is a consumer. Why? | [
"It eats another living thing.",
"It makes its own food."
] | 0 | This diagram shows a food chain from the River Frome, a freshwater ecosystem in England. | closed choice | grade3 | natural science | biology | Ecosystems | Identify roles in food chains | Every living thing needs food to stay alive. Living things get their food in different ways. A food chain shows how living things in an ecosystem get their food.
Producers make their own food. Many producers use carbon dioxide, water, and sunlight to make sugar. This sugar is food for the producer.
Consumers eat other ... | In this food chain, the European grayling is a consumer because it eats another living thing. The European grayling in this food chain eats the midge larva. |
train/4758 | Is molten metal a solid, a liquid, or a gas? | [
"a liquid",
"a solid",
"a gas"
] | 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... | Molten metal is a liquid. A liquid takes the shape of any container it is in.
If you pour molten metal into a mold, the molten metal will take the shape of the mold. | |
train/4759 | Which country is highlighted? | [
"Tuvalu",
"Kiribati",
"Fiji",
"Tonga"
] | 0 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Tuvalu. | ||
train/4760 | In this experiment, which were part of an experimental group? | [
"the mint plants that did not get earthworms",
"the mint plants that got earthworms"
] | 1 | The passage below describes an experiment.
Jayden grew ten on his back porch. He grew each plant in its own pot. Jayden noticed that his plants did not grow many leaves, and he wanted to see if earthworms could help them grow more.
Jayden divided his ten plants into two equal groups. He added three earthworms each to... | closed choice | grade7 | 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, Jayden investigated whether adding earthworms to soil affects how many leaves grow on mint plants. So, the mint plants that got earthworms were part of an experimental group.
There were no earthworms in the soil of the mint plants that did not get earthworms. So, they were not part of an experimenta... |
train/4761 | Which bird's beak is also adapted to get nectar out of long flowers? | [
"purple honeycreeper",
"European nightjar"
] | 0 | Rufous hummingbirds live in the woodlands and meadows of western North America. The shape of the 's beak is adapted to get nectar out of long flowers.
Figure: rufous hummingbird. | 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 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 rufous hummingbird.
The rufous hummingbird has a long, thin beak. Its beak is adapted to get nectar out of long flowers. The rufous hummingbird's long, thin beak can reach deep into the flowers.
Now look at each bird. Figure out which bird has a similar adaptation.
The purple honeycreeper has... |
train/4762 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"neither; the samples have the same temperature",
"sample A"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | 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/4763 | What is the capital of Connecticut? | [
"Columbus",
"New Haven",
"Hartford",
"Pierre"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Hartford is the capital of Connecticut. | ||
train/4764 | Which rhetorical appeal is primarily used in this ad? | [
"pathos (emotion)",
"ethos (character)",
"logos (reason)"
] | 0 | 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 pathos, or emotion, by associating the air freshener with positive feelings. | |
train/4765 | Which better describes the Sahara Desert ecosystem? | [
"It has dry, thin soil. It also has many different types of organisms.",
"It has a small amount of rain. It also has only a few types of organisms."
] | 0 | Figure: Sahara Desert.
The Sahara Desert is a hot desert ecosystem in northern Africa. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A hot desert is a type of ecosystem. Hot deserts have the following features: a small amount of rain, dry, thin soil, and many different types of organisms. So, the Sahara Desert has dry, thin soil. It also has many different types of organisms. |
train/4766 | Which rhetorical appeal is primarily used in this ad? | [
"ethos (character)",
"pathos (emotion)",
"logos (reason)"
] | 0 | 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 ethos, or character, by emphasizing that the brand has been trusted by customers for many years. | |
train/4767 | 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. | 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,... | Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magnitude of the magnetic force between them is smaller.
There is a greater distance between the magnets in Pair 2 than in Pair 1. So, the magnitude of the magnetic force is smaller in Pair 2 than in Pair 1. |
train/4768 | What can Lacey and Akira trade to each get what they want? | [
"Akira can trade her almonds for Lacey's tomatoes.",
"Lacey can trade her tomatoes for Akira's carrots.",
"Lacey can trade her tomatoes for Akira's broccoli.",
"Akira can trade her broccoli for Lacey's oranges."
] | 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.
Lacey and Akira open their lunch boxes in the school cafeteria. Neither Lacey nor Akira 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.
Lacey wants broccoli. Akira 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/4769 | What is the capital of New Mexico? | [
"Albuquerque",
"Helena",
"Sacramento",
"Santa Fe"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Santa Fe is the capital of New Mexico. | ||
train/4770 | Select the organism in the same genus as the Dalmatian pelican. | [
"Falco peregrinus",
"Balearica pavonina",
"Pelecanus erythrorhynchos"
] | 2 | This organism is a Dalmatian pelican. Its scientific name is Pelecanus crispus. | 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 Dalmatian pelican's scientific name is Pelecanus crispus. The first word of its scientific name is Pelecanus.
Balearica pavonina is in the genus Balearica. The first word of its scientific name is Balearica. So, Balearica pavonina and Pelecanus crispus are not in the same genus.
Falco peregrinus is in the genus Falco... |
train/4771 | Complete the statement.
Hydrogen fluoride is (). | [
"a compound",
"an elementary substance"
] | 0 | The model below represents a molecule of hydrogen fluoride. Hydrogen fluoride is used to make chemicals that can help keep refrigerators cool. | closed choice | grade8 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | Use the model to determine whether hydrogen fluoride is an elementary substance or a compound.
Step 1: Interpret the model.
.
Use the legend to determine the chemical element represented by each color. The colors and atomic symbols from the legend are shown in the table below. The table also includes the names of the c... |
train/4772 | Identify the question that Madelyn and Tucker's experiment can best answer. | [
"Does Madelyn's snowboard slide down a hill in less time when it has a thin layer of wax or a thick layer of wax?",
"Does Madelyn's snowboard slide down a hill in less time when it has a layer of wax or when it does not have a layer of wax?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Madelyn applied a thin layer of wax to the underside of her snowboard and rode the board straight down a hill. Then, she removed the wax and rode the snowboard straight down the hill again. She repeated the rides four m... | 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/4773 | 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 | 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 greenhouse increased, which means that the thermal energy of each greenhouse increased. So, thermal energy was transferred from the surroundings to each greenhouse. |
train/4774 | What is the capital of Wyoming? | [
"Salt Lake City",
"Laramie",
"Cheyenne",
"Phoenix"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | ||
train/4775 | Which continent is highlighted? | [
"South America",
"Europe",
"North America",
"Antarctica"
] | 2 | 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 North America. | |
train/4776 | Which term matches the picture? | [
"monocot",
"dicot"
] | 0 | Read the text.
Flowering plants are commonly divided into two groups: monocots and dicots. They are distinguished by the number of cotyledons their seeds have—a cotyledon is an undeveloped leaf inside the seed. Monocot seeds have one cotyledon while dicot seeds have two. You can also tell mature monocots and dicots apa... | closed choice | grade8 | language science | word-study | Domain-specific vocabulary | Determine the meaning of domain-specific words with pictures | A monocot is a flowering plant that has seeds with one cotyledon. Its flower parts occur in multiples of three, and its leaves have parallel veins. | |
train/4777 | 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 strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker 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 | grade4 | 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 1 are farther apart than the magnets in Pair 2. So, the magnetic force is weaker in Pair 1 than in Pair 2. |
train/4778 | What is the capital of Oregon? | [
"Memphis",
"Salem",
"Phoenix",
"Portland"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. | ||
train/4779 | Which solution has a higher concentration of purple particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each purple ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container.
Use the concentration formula to find the number of purple particles per mill... |
train/4780 | Which type of relationship is formed when European mistletoe grows on a linden tree? | [
"commensal",
"parasitic",
"mutualistic"
] | 1 | Read the passage. Then answer the question.
European mistletoe is a shrub that grows on trees, including linden trees. The mistletoe has specialized roots that pierce the tree's bark and absorb nutrients and water from inside the tree. These resources from the tree allow the mistletoe to grow up to five feet in diamet... | 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 European mistletoe grows on a linden tree, the mistletoe gets nutrients and water that it needs to grow and survive. So, the mistletoe benefits from its relationship with the tree.
The tree grows more slowly and makes fewer seeds when the mistletoe grows on it. So, the tree is harmed by its relationship with the m... |
train/4781 | What is the capital of Alaska? | [
"Anchorage",
"Juneau",
"Honolulu",
"Boise"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/4782 | What is the capital of Alaska? | [
"Tulsa",
"Juneau",
"Lincoln",
"Olympia"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/4783 | Which better describes the tide pool ecosystems in Tongue Point Marine Life Sanctuary? | [
"It has no sunlight. It also has daily flooding and draining of seawater.",
"It has water that is rich in nutrients. It also has many different types of organisms."
] | 1 | Figure: Tongue Point Marine Life Sanctuary.
Tongue Point Marine Life Sanctuary is in western Washington State. The park is on the coast of the Pacific Ocean. It has many tide pool ecosystems. | 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 tide pool is a type of ecosystem. Tide pool ecosystems have the following features: daily flooding and draining of seawater, water that is rich in nutrients, and many different types of organisms. So, the tide pool ecosystems in Tongue Point Marine Life Sanctuary have water that is rich in nutrients. They also have m... |
train/4784 | 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 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,... | 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 ... |
train/4785 | Select the bird below. | [
"robin",
"gorilla"
] | 0 | Birds have feathers, two wings, and a beak. A griffon vulture is an example of a bird. | 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 robin is a bird. It has feathers, two wings, and a beak.
A robin is a songbird. It sings different songs at different times of the day.
A gorilla is a mammal. It has fur and feeds its young milk.
Gorillas live in groups called troops. The largest male in the troop is usually the leader. |
train/4786 | Which of the following best describes a population on the prairie grasslands of Montana? | [
"a herd of American bison",
"the Idaho fescue and the rough fescue",
"the wolves, the mountain lions, and the grizzly bears"
] | 0 | Read the passage. Then answer the question below.
American bison roam in herds across the prairie grasslands in Montana. They are the only species of bison in North America. These large herbivores feed on the dozens of species of grasses that grow on the prairie, such as Idaho fescue and rough fescue.
American bison a... | closed choice | grade7 | natural science | biology | Ecosystems | Describe populations, communities, and ecosystems | In an environment, organisms interact with each other and with their nonliving surroundings. To help describe these interactions, ecologists use specific terms for different types of groups.
A single organism is an individual. Individuals of the same species that live in the same place are part of a population.
Multipl... | |
train/4787 | Which property do these two objects have in common? | [
"sticky",
"bendable"
] | 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 bendable object can be bent without breaking. Both objects are bendable.
A sticky object can stick to other things. Neither of the objects are sticky.
The property that both objects have in common is bendable. |
train/4788 | What is the name of the colony shown? | [
"Vermont",
"New Hampshire",
"Georgia",
"Iowa"
] | 1 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New Hampshire.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | ||
train/4789 | What is the capital of New Jersey? | [
"Albany",
"Trenton",
"Augusta",
"Jersey City"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Trenton is the capital of New Jersey. | ||
train/4790 | Which property do these three objects have in common? | [
"scratchy",
"flexible",
"yellow"
] | 1 | 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.
Yellow is a color.
This color is yellow. None of the objects are yellow.
A flexible object can be folded or bent without breaking easily. All three objects are flexible.
A scratchy object is rough and itchy against your skin. None of the objects are ... |
train/4791 | Which of the following organisms is the secondary consumer in this food web? | [
"lichen",
"bilberry",
"short-tailed weasel"
] | 2 | Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade6 | natural science | biology | Ecological interactions | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Secondary consumers eat primary consumers, and primary consumers eat producers. So, in a food web, secondary consumers have arrows pointing to them from primary consumers. Primary consumers have arrows pointing to them from producers.
The short-tailed weasel has an arrow pointing to it from the brown lemming. The brown... |
train/4792 | Which of these oceans does the prime meridian intersect? | [
"the Arctic Ocean",
"the Indian Ocean",
"the Pacific Ocean"
] | 0 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects the Arctic Ocean. It does not intersect the Indian Ocean or the Pacific Ocean. | |
train/4793 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The 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/4794 | Which of these states is farthest north? | [
"Kentucky",
"North Carolina",
"Pennsylvania",
"Nevada"
] | 2 | 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 north arrow is pointing. Pennsylvania is farthest north. | |
train/4795 | Which country is highlighted? | [
"Cuba",
"The Bahamas",
"Barbados",
"Haiti"
] | 1 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is The Bahamas. | ||
train/4796 | What is the name of the colony shown? | [
"Iowa",
"Pennsylvania",
"Virginia",
"Alabama"
] | 1 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Pennsylvania. | ||
train/4797 | What is the capital of Hawaii? | [
"Salt Lake City",
"Lexington",
"Honolulu",
"Sacramento"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Honolulu is the capital of Hawaii. | ||
train/4798 | Which statement describes the Tibetan Plateau ecosystem? | [
"It has long, cold winters and short, cold summers.",
"It has warm summers and cool winters.",
"It has many evergreen trees."
] | 0 | Figure: Tibetan Plateau.
The Tibetan Plateau is a tundra ecosystem located in Tibet, western China, and northern India. The plateau is over 14,800 feet high and is surrounded by many mountain ranges. | closed choice | grade6 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A tundra is a type of ecosystem. Tundras have the following features: long, cold winters and short, cold summers, soil that is frozen year-round, and mostly small plants. So, the following statement describes the Tibetan Plateau ecosystem: long, cold winters and short, cold summers, soil that is frozen year-round, and ... |
train/4799 | Which trait did Curculioides adompha have? Select the trait you can observe on the fossil. | [
"thin legs",
"red eyes"
] | 0 | This picture shows a fossil of an animal called Curculioides adompha. This fossil is more than 300,000,000 years old. | closed choice | grade4 | natural science | earth-science | Fossils | Compare fossils to modern organisms | The way an organism looks or acts is called a trait. Scientists use fossils to learn more about the traits of ancient organisms.
Fossils can preserve the remains of body parts and activities. A fossil of a body part, such as a tail or a wing, can tell you what an organism looked like. A fossil of an organism's activiti... |
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