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Which property matches this object? | [
"salty",
"yellow"
] | 0 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. | Look at the object.
Think about each property.
Potato chips have a salty taste. The ocean water is salty.
Yellow is a color.
This color is yellow. The ocean water is not yellow. | |
Which is this organism's common name? | [
"bull shark",
"Carcharhinus leucas"
] | 0 | This organism is a bull shark. It is also called Carcharhinus leucas. | 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,... | Carcharhinus leucas is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Carcharhinus leucas is the organism's scientific name. So, you know that bull shark is the common name. | |
Not supported with pagination yet | Suppose Tommy decides to plant the gardenias. Which result would be a cost? | [
"Tommy will give up the chance to look at the palm tree. He thinks it would have looked more beautiful than the gardenias.",
"He will save some space. The gardenias will use up less space than the palm tree would have used up."
] | 0 | Tommy is deciding whether to plant gardenias or a palm tree in his backyard. He wants to make his backyard more beautiful. But he also wants to leave space for doing fun things. | closed choice | grade5 | social science | economics | Basic economic principles | Costs and benefits | Before you decide to do something, it is often helpful to list costs and benefits.
Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need.
Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa... | This result is a cost. It involves giving up or spending something that Tommy wants or needs:
Tommy will give up the chance to look at the palm tree. He thinks it would have looked more beautiful than the gardenias. |
Which property matches this object? | [
"slippery",
"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.
Potato chips have a salty taste. The potato chips are salty.
A slippery object is hard to hold onto or stand on. The potato chips are not slippery. | |
Which animal's feet are also adapted to walk on snow and ice? | [
"Siberian tiger",
"horse"
] | 0 | Many s live in areas with cold, snowy winters. The 's feet are adapted for walking on snow and ice.
Figure: brown bear. | 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 brown bear.
The brown bear has furry feet with large pads. Its feet are adapted to walk on snow and ice. The fur can help keep the brown bear's feet warm. The large pads help spread its weight over a larger area. This allows it to walk on ice without slipping and to walk on snow without sinki... | |
Select the organism in the same species as the red kangaroo. | [
"Camelus bactrianus",
"Cervus canadensis",
"Macropus rufus"
] | 2 | This organism is a red kangaroo. Its scientific name is Macropus rufus. | 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 red kangaroo's scientific name is Macropus rufus.
Cervus canadensis does not have the same scientific name as a red kangaroo. So, Macropus rufus and Cervus canadensis are not in the same species.
Camelus bactrianus does not have the same scientific name as a red kangaroo. So, Macropus rufus and Camelus bactrianus are... | |
Not supported with pagination yet | Based on this information, what is Madelyn's phenotype for the Thomsen disease trait? | [
"not having Thomsen disease",
"having Thomsen disease"
] | 1 | This passage describes the Thomsen disease trait in humans:
In a group of humans, some individuals have Thomsen disease and others do not. In this group, the gene for the Thomsen disease trait has two alleles. The allele for not having Thomsen disease (m) is recessive to the allele for having Thomsen disease (M).
Made... | closed choice | grade8 | natural science | biology | Genes to traits | Genetics vocabulary: dominant and recessive | All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ... | Madelyn's genotype for the Thomsen disease gene is MM. Madelyn's genotype of MM has only M allelles. The M allele is for having Thomsen disease. So, Madelyn's phenotype for the Thomsen disease trait must be having Thomsen disease.
To check this answer, consider whether Madelyn's alleles are dominant or recessive. The a... |
Not supported with pagination yet | Using only these supplies, which question can Lisa investigate with an experiment? | [
"Do squash plants grow larger if the seeds are planted with compost or without compost?",
"If squash seeds and tomato seeds are planted with compost, which type of plant grows larger?",
"Do squash plants grow larger if the seeds are planted in small pots or in large pots?"
] | 0 | Lisa has a small vegetable garden, which includes a compost pile of food scraps. She notices that some of the squash plants growing next to the compost pile grow differently than squash plants that are farther away. She wonders what factors affect how her squash plants grow. So, she decides to design an experiment. She... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify questions that can be investigated with a set of materials | Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment.
Imagine that you are wondering if plants gro... | |
Not supported with pagination yet | Which ball of clay has more thermal energy? | [
"the hotter ball of clay",
"the colder ball of clay"
] | 0 | Two 200-gram balls of clay are identical except for their temperatures. | closed choice | grade6 | natural science | physics | Thermal energy | How are temperature and mass related to thermal energy? | Matter is made of tiny particles called atoms. Atoms are always moving.
The energy of moving atoms is called thermal energy. The total amount of thermal energy in matter depends on three things: the type of matter, the amount of matter, and how fast the atoms are moving.
Temperature measures how hot or cold matter is. ... | The two balls of clay are made of the same material and have the same mass. So, the hotter ball of clay has more thermal energy. |
Which property matches this object? | [
"yellow",
"shiny"
] | 1 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. | Look at the object.
Think about each property.
A shiny object reflects a lot of light. The tin foil is shiny.
Yellow is a color.
This color is yellow. The tin foil is not yellow. | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 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 ... | |
What is the capital of Delaware? | [
"Pierre",
"Portland",
"Dover",
"Wilmington"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | |||
Not supported with pagination yet | Which sentence states a fact? | [
"Olympic athletes are excellent role models for kids.",
"The first modern Olympic Games were held in Athens in 1896."
] | 1 | closed choice | grade8 | social science | civics | Social studies skills | Identify facts and opinions | A fact is something that can be proved true by research or observation.
George Washington became president of the United States in 1789.
This statement is a fact. It can be proved by researching what year George Washington was inaugurated president.
An opinion is something that a person believes, thinks, or feels. An o... | The first sentence states a fact.
The first modern Olympic Games were held in Athens in 1896.
It can be proved by researching the history of the Olympics.
The second sentence states an opinion.
Olympic athletes are excellent role models for kids.
Excellent shows what a person believes, thinks, or feels. Another person ... | |
Which material is this cup made of? | [
"plastic",
"metal"
] | 0 | closed choice | grade2 | natural science | physics | Materials | Identify materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials. | Look at the picture of the cup.
The cup is made of plastic.
Plastic is strong, so it is a good material for a cup. If you drop a plastic cup it usually doesn't break. | ||
Not supported with pagination yet | What is the temperature of the air on a hot day? | [
"37°C",
"37°F"
] | 0 | Select the better estimate. | closed choice | grade6 | natural science | units-and-measurement | Units and measurement | Estimate temperatures | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
Temperature can be written with units of degrees Fahrenheit (°F) or Celsius (°C). Use the list below to compare the two units.
212°F | Water boils | 100°C
98.6°F | Body temperature | 37°C
68°F ... | The better estimate for the temperature of the air on a hot day is 37°C.
37°F is too cold. |
What is the direction of this pull? | [
"toward the magnet",
"away from the magnet"
] | 0 | A huge magnet moves metal in a junkyard. The magnet's force pulls pieces of metal upward. | 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 magnet pulls the pieces of metal upward. The direction of the pull is toward the magnet. | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 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 | 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 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... | |
Not supported with pagination yet | Compare the motion of three sailboats. Which sailboat was moving at the lowest speed? | [
"a sailboat that moved 50miles north in 10hours",
"a sailboat that moved 75miles north in 10hours",
"a sailboat that moved 35miles south in 10hours"
] | 2 | closed choice | grade3 | natural science | physics | Force and motion | Compare the speeds of moving objects | An object's speed tells you how fast the object is moving. Speed depends on both distance and time.
Distance tells you how far the object has moved. One unit used to measure distance is the mile.
Time tells you how long the object has spent moving. One unit used to measure time is the hour.
Think about objects moving f... | Look at the distance each sailboat moved and the time it took to move that distance. The direction each sailboat moved does not affect its speed.
Notice that each sailboat moved for 10 hours. The sailboat that moved 35 miles moved the shortest distance in that time. So, that sailboat must have moved at the lowest speed... | |
Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Antarctica.
Scientists face many challenges working in Antarctica. Cracked lips and dry skin are constant problems on scientific expeditions like the one shown here. The low humidity over the last month of the expedition didn't help!
Hint: Weather is what the atmosphere is like at a certain place and time. Clim... | 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.
Scientists face many challenges working in Antarctica. Cracked lips and dry skin are constant problems on scientific expeditions like the one shown here. The low humidity over the last month of the expedition didn't help!
The underlined part of the passage tells you about the humidity in Ant... | |
Not supported with pagination yet | Is the following trait inherited or acquired?
Porter has a scar on his left ankle. | [
"acquired",
"inherited"
] | 0 | closed choice | grade5 | natural science | biology | Traits and heredity | Identify inherited and acquired traits | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned.
Acquired traits are gained during a person's lif... | Children do not inherit their parent's scars. Instead, scars are caused by the environment. People can get scars after they get hurt. So, having a scar is an acquired trait. | |
What is the name of the colony shown? | [
"Maryland",
"Georgia",
"Tennessee",
"Delaware"
] | 3 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Delaware. | |||
Not supported with pagination yet | According to Newton's third law, what other force must be happening? | [
"The gas pedal is pushing on Nina's foot.",
"The gas pedal is pulling on Nina's foot."
] | 0 | Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Nina's foot is pushing on her car's gas pedal. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Predict forces using Newton's third law | According to Newton's third law, for every force, there is an equal and opposite force. This means that if one object is applying a force on a second object, the second object must also be applying a force on the first object, but in the opposite direction.
For example, if your hand is pushing down on a table, the tabl... | Nina's foot is pushing on the gas pedal. So, Newton's third law tells you that the gas pedal is pushing on Nina's foot. |
Not supported with pagination yet | What information supports the conclusion that David acquired this trait? | [
"David's scar was caused by an accident. He cut his arm when he fell off his bicycle.",
"Some scars fade more quickly than others."
] | 0 | Read the description of a trait.
David has a scar on his right arm. | closed choice | grade3 | natural science | biology | Heredity | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned.
Acquired traits are gained during a person's lif... | |
Not supported with pagination yet | What information supports the conclusion that Elizabeth acquired this trait? | [
"Elizabeth learned how to knit in an after school program.",
"Elizabeth knits sweaters using cotton, wool, and other types of yarn."
] | 0 | Read the description of a trait.
Elizabeth knows how to knit sweaters. | closed choice | grade6 | natural science | biology | Genes to traits | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits.... | |
Not supported with pagination yet | Which word would you find on a dictionary page with the following guide words?
neck - nobody | [
"nice",
"nation"
] | 0 | closed choice | grade2 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since nice is between the guide words neck - nobody, it would be found on that page. | |
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."
] | 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 | 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 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 ... | |
Not supported with pagination yet | Is driving a taxi a good or a service? | [
"a good",
"a service"
] | 1 | closed choice | grade2 | social science | economics | Economics | Goods and services | Everything you can buy is either a good or a service.
A good is something you can touch or hold in your hands. For example, a hammer is a good.
A service is a job you pay someone else to do. For example, cooking food in a restaurant is a service. | To decide whether driving a taxi is a good or a service, ask these questions:
Is driving a taxi something you can touch? No.
Is driving a taxi a job you might pay someone else to do? Yes.
So, driving a taxi is a service. | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | 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.
Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magni... | |
Which continent is highlighted? | [
"Antarctica",
"South America",
"North America",
"Europe"
] | 1 | closed choice | grade6 | social science | geography | Physical Geography | Oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is South America. | ||
Which solution has a higher concentration of yellow particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each yellow ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... | |
What is the capital of South Dakota? | [
"Sioux Falls",
"Helena",
"Rapid City",
"Pierre"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | |||
Not supported with pagination yet | What do these two changes have in common?
water evaporating from a lake
cooking an egg | [
"Both are caused by heating.",
"Both are caused by cooling.",
"Both are chemical changes.",
"Both are only physical changes."
] | 0 | closed choice | grade7 | natural science | chemistry | Chemical reactions | Compare physical and chemical changes | Matter is made of very small particles called atoms. Atoms can be linked together by chemical bonds. When two or more atoms link together, they form a molecule.
In a chemical change, the chemical bonds in the molecules break. The atoms then link together to form different molecules. The types of molecules in matter bef... | Step 1: Think about each change.
Water evaporating from a lake is a change of state. So, it is a physical change. The liquid changes into a gas, but a different type of matter is not formed.
Cooking an egg is a chemical change. The heat causes the matter in the egg to change. Cooked egg and raw egg are different types ... | |
Not supported with pagination yet | What do these two changes have in common?
butter melting on a hot day
baking a loaf of bread | [
"Both are caused by cooling.",
"Both are only physical changes.",
"Both are caused by heating.",
"Both are chemical changes."
] | 2 | closed choice | grade8 | natural science | chemistry | Chemical reactions | Compare physical and chemical changes | Matter is made of very small particles called atoms. Atoms can be linked together by chemical bonds. When two or more atoms link together, they form a molecule.
In a chemical change, the chemical bonds in the molecules break. The atoms then link together to form different molecules. The types of molecules in matter bef... | Step 1: Think about each change.
Butter melting on a hot day is a change of state. So, it is a physical change. The butter changes from solid to liquid, but it is still made of the same type of matter.
Baking a loaf of bread is a chemical change. The type of matter in the dough changes when it is baked. The dough turns... | |
What is the name of the colony shown? | [
"Florida",
"New Jersey",
"Pennsylvania",
"Delaware"
] | 2 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Pennsylvania. | |||
Not supported with pagination yet | Which word would you find on a dictionary page with the following guide words?
beetle - black | [
"bid",
"back"
] | 0 | closed choice | grade4 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since bid is between the guide words beetle - black, it would be found on that page. | |
Not supported with pagination yet | What do these two changes have in common?
plants making food from sunlight, air, and water
rust forming on a metal gate | [
"Both are caused by cooling.",
"Both are caused by heating.",
"Both are only physical changes.",
"Both are chemical changes."
] | 3 | closed choice | grade4 | natural science | chemistry | Physical and chemical change | Compare physical and chemical changes | Chemical changes and physical changes are two common ways matter can change.
In a chemical change, the type of matter changes. The types of matter before and after a chemical change are always different.
Some chemical changes are caused by heating or cooling. For example, burning a piece of paper is a chemical change c... | Step 1: Think about each change.
Plants making food is a chemical change. Plants use energy from sunlight to change air and water into food. The food is sugar. Sugar is a different type of matter than air or water.
Rust forming on a metal gate is a chemical change. As the gate rusts, the metal turns into a different ty... | |
Not supported with pagination yet | Read the following excerpt from a student essay. How can the writer best improve his or her grammar and mechanics?
Self-expression is important, therefore, you should be yourself no matter what other people think. People might express their inner selves through music, art, or writing, through foods they eat, cook, and ... | [
"by adding missing commas",
"by using semicolons correctly",
"by punctuating the quotation correctly"
] | 1 | closed choice | grade11 | language science | writing-strategies | Editing and revising | Suggest appropriate revisions | During peer review, you read and respond to a fellow student's writing. While there are many methods and strategies that you can use for reviewing a text, it is generally helpful to frame your suggestions in concrete and constructive ways and to consider the following areas for revision:
Ideas and development: Does the... | The writer could best improve his or her grammar and mechanics by using semicolons correctly.
For example, the writer could use semicolons before the conjunctive adverb therefore in the first underlined sentence, to separate items in a series containing commas in the second underlined sentence, and instead of a comma t... | |
Not supported with pagination yet | Which correctly shows the title of a play? | [
"Big Bad and Little Red",
"Big bad and Little Red"
] | 0 | closed choice | grade3 | language science | capitalization | Formatting | Capitalizing titles | In a title, capitalize the first word, the last word, and every important word in between.
The Wind in the Willows James and the Giant Peach
These words are not important in titles:
Articles, a, an, the
Short prepositions, such as at, by, for, in, of, on, to, up
Coordinating conjunctions, such as and, but, or | Capitalize the first word, the last word, and every important word in between. The word and is not important, so it should not be capitalized.
The correct title is Big Bad and Little Red. | |
Which property do these three objects have in common? | [
"bumpy",
"colorful",
"stretchy"
] | 0 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A stretchy object gets longer when you pull on it. The popcorn and the log are not stretchy.
A colorful object has one or more bright colors. None of the objects are colorful.
A bumpy object is covered in lumps and bumps. All three objects are bumpy.... | |
Not supported with pagination yet | Suppose Raymond decides to take a trip to Rhode Island. Which result would be a cost? | [
"Raymond will spend more money. Plane tickets for Raymond to get to Rhode Island are more expensive than tickets to Illinois.",
"Raymond will enjoy his trip to Rhode Island more than he would have enjoyed a trip to Illinois."
] | 0 | Raymond is deciding whether to take a trip to Rhode Island or Illinois. He wants to enjoy his trip. But he is also trying to save money. | closed choice | grade5 | social science | economics | Basic economic principles | Costs and benefits | Before you decide to do something, it is often helpful to list costs and benefits.
Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need.
Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa... | This result is a cost. It involves giving up or spending something that Raymond wants or needs:
Raymond will spend more money. Plane tickets for Raymond to get to Rhode Island are more expensive than tickets to Illinois. |
Not supported with pagination yet | Which correctly shows the title of a movie? | [
"***That Thing You Do***",
"\"That Thing You Do!\""
] | 0 | closed choice | grade9 | language science | punctuation | Formatting | Formatting titles | The title of a book, movie, play, TV show, magazine, or newspaper should be in italics. If you write it by hand, it can be underlined instead.
A Midsummer Night's Dream
The title of a poem, song, article, or short story should be in quotation marks.
"You Are My Sunshine" | A movie should be in italics.
The correct title is **That Thing You Do**. | |
Not supported with pagination yet | How long is a paper clip? | [
"35 millimeters",
"35 kilometers",
"35 centimeters",
"35 meters"
] | 0 | Select the best estimate. | closed choice | grade8 | natural science | units-and-measurement | Units and measurement | Choose metric units of distance, mass, and volume | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
When you are using metric units, length can be written with units of millimeters, centimeters, meters, or kilometers. One meter contains 100 centimeters or 1,000 millimeters. So, 1 meter is lar... | The best estimate for the length of a paper clip is 35 millimeters.
35 centimeters, 35 meters, and 35 kilometers are all too long. |
Is Leopardus wiedii made up of many cells? | [
"no",
"yes"
] | 1 | This organism is Leopardus wiedii. It is a member of the animal kingdom.
Leopardus wiedii is commonly called a margay. Margays live in the forest in Central and South America. Margays are nocturnal. A nocturnal animal sleeps most of the day and is awake at night. | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | Leopardus wiedii is an animal. Animals are made up of many cells. | ||
Not supported with pagination yet | Which tense does the sentence use?
The cook will freeze the meat for another time. | [
"past tense",
"present tense",
"future tense"
] | 2 | closed choice | grade3 | language science | verbs | Verb tense | Is the sentence in the past, present, or future tense? | Present tense verbs tell you about something that is happening now.
Most present-tense verbs are regular. They have no ending, or they end in -s or -es.
Two verbs are irregular in the present tense, to be and to have. You must remember their forms.
Past tense verbs tell you about something that has already happened.
Mo... | The sentence is in future tense. You can tell because it uses will before the main verb, freeze. The verb tells you about something that is going to happen. | |
Select the organism in the same genus as the great gray owl. | [
"Camelus dromedarius",
"Neofelis nebulosa",
"Strix varia"
] | 2 | This organism is a great gray owl. Its scientific name is Strix nebulosa. | 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 great gray owl's scientific name is Strix nebulosa. The first word of its scientific name is Strix.
Camelus dromedarius is in the genus Camelus. The first word of its scientific name is Camelus. So, Camelus dromedarius and Strix nebulosa are not in the same genus.
Strix varia is in the genus Strix. The first word of ... | |
What can Sharon and Ernesto trade to each get what they want? | [
"Ernesto can trade his almonds for Sharon's tomatoes.",
"Sharon can trade her tomatoes for Ernesto's broccoli.",
"Ernesto can trade his broccoli for Sharon's oranges.",
"Sharon can trade her tomatoes for Ernesto's carrots."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Sharon and Ernesto open their lunch boxes in the school cafeteria. Neither Sharon nor Ernesto got everything that they wanted. Th... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Sharon wants broccoli. Ernesto 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. | ||
What is the capital of Washington? | [
"Denver",
"Olympia",
"Topeka",
"Des Moines"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Olympia is the capital of Washington. | |||
Not supported with pagination yet | Which is harder? | [
"metal horseshoe",
"wool sweater"
] | 0 | closed choice | grade3 | natural science | physics | Materials | Compare properties of materials | Every object is made of one or more materials. A material is a type of matter. Wood, glass, metal, and plastic are common materials.
A material has different properties. A material's properties tell you how it looks, feels, tastes, or smells. Some examples of properties are shiny, hard, fragile, and stretchy.
For examp... | Hard is a property. A hard material keeps its shape when you press on it with your finger.
Look at each picture, one at a time. Imagine pushing on the material shown in each picture.
Of the choices, the metal horseshoe is harder. If you squeeze a metal horseshoe, it will not change shape. | |
What is the capital of North Dakota? | [
"Frankfort",
"Lincoln",
"Harrisburg",
"Bismarck"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Bismarck is the capital of North Dakota. | |||
Select the organism in the same genus as the copperband butterflyfish. | [
"Syngnathoides biaculeatus",
"Alopias pelagicus",
"Chelmon rostratus"
] | 2 | This organism is a copperband butterflyfish. Its scientific name is Chelmon rostratus. | 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 copperband butterflyfish's scientific name is Chelmon rostratus. The first word of its scientific name is Chelmon.
Syngnathoides biaculeatus is in the genus Syngnathoides. The first word of its scientific name is Syngnathoides. So, Syngnathoides biaculeatus and Chelmon rostratus are not in the same genus.
This organi... | |
What can Austin and Victoria trade to each get what they want? | [
"Victoria can trade her almonds for Austin's tomatoes.",
"Austin can trade his tomatoes for Victoria's broccoli.",
"Austin can trade his tomatoes for Victoria's carrots.",
"Victoria can trade her broccoli for Austin'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.
Austin and Victoria open their lunch boxes in the school cafeteria. Neither Austin nor Victoria got everything that they wanted. ... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Austin wants broccoli. Victoria 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. | ||
Select the reptile below. | [
"American alligator",
"manta ray"
] | 0 | Reptiles have scaly, waterproof skin. Most reptiles live on land. A box turtle is an example of a reptile. | 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. | An American alligator is a reptile. It has scaly, waterproof skin.
A manta ray is a fish. It lives underwater. It has fins, not limbs. | |
Select the mammal below. | [
"poison dart frog",
"fruit bat",
"manta ray",
"piranha"
] | 1 | Mammals have hair or fur and feed their young milk.
Mammals are warm-blooded. Warm-blooded animals can control their body temperature.
A giraffe is an example of a mammal. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | A fruit bat is a mammal. It has hair and feeds its young milk.
Fruit bats eat fruit and drink nectar from flowers. They have special teeth to help them bite through fruit skins.
A poison dart frog is an amphibian. It has moist skin and begins its life in water.
Poison dart frogs come in many bright colors. Their bright... | |
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"neither; the samples have the same temperature"
] | 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 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 ... | |
Not supported with pagination yet | Complete the sentence so that it uses personification.
The butterflies flitted from flower to flower, (). | [
"playing hide-and-seek",
"floating gently"
] | 0 | closed choice | grade10 | language science | writing-strategies | Creative techniques | Use personification | Personification is giving human characteristics to nonhuman things. It is a figure of speech that can be used to make writing more interesting or to emphasize a point.
The trees danced in the wind.
The word danced describes the trees as if they were people. Unlike people, however, trees can't actually dance. Instead, t... | Complete the sentence with the phrase playing hide-and-seek. It describes the butterflies as if they were playful children. | |
Look at the models of molecules below. Select the elementary substance. | [
"carbon tetrachloride",
"fluoromethanol",
"fluorine"
] | 2 | 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 ... | |||
Not supported with pagination yet | Suppose Cameron decides to plant the amaryllises. Which result would be a cost? | [
"Cameron will give up the chance to look at the magnolia tree. He thinks it would have looked more beautiful than the amaryllises.",
"He will save some space. The amaryllises will use up less space than the magnolia tree would have used up."
] | 0 | Cameron is deciding whether to plant amaryllises or a magnolia tree in his backyard. He wants to make his backyard more beautiful. But he also wants to leave space for doing fun things. | closed choice | grade5 | social science | economics | Basic economic principles | Costs and benefits | Before you decide to do something, it is often helpful to list costs and benefits.
Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need.
Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa... | This result is a cost. It involves giving up or spending something that Cameron wants or needs:
Cameron will give up the chance to look at the magnolia tree. He thinks it would have looked more beautiful than the amaryllises. |
Not supported with pagination yet | Which figure of speech is used in this text?
What thoughts I have of you tonight Walt Whitman, for I walked down the sidestreets under the trees with a headache self-conscious looking at the full moon.
—Allen Ginsberg, "A Supermarket in California" | [
"antithesis",
"apostrophe"
] | 1 | closed choice | grade11 | language science | figurative-language | Literary devices | Classify the figure of speech: review | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
Anaphora is the repetition of the same word or words at the beginning of several phrases or clauses.
We are united. We are powerful. We are winners.
Antithesis involves contrasting opposing id... | The text uses apostrophe, a direct address to an absent person or a nonhuman entity.
What thoughts I have of you tonight Walt Whitman is a direct address to Walt Whitman, an absent person. (Walt Whitman was an American poet who died in 1892, over half a century before this poem was written.) | |
Not supported with pagination yet | Which organ uses acid to break down food? | [
"brain",
"stomach",
"muscles",
"skin"
] | 1 | closed choice | grade5 | natural science | biology | Animals | Human organs and their functions | |||
Which continent is highlighted? | [
"Australia",
"North America",
"South America",
"Asia"
] | 3 | closed choice | grade8 | 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 Asia. | ||
Which of these oceans does the prime meridian intersect? | [
"the Arctic Ocean",
"the Pacific Ocean",
"the Indian 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 Pacific Ocean or the Indian Ocean. | ||
Which material are these packing peanuts made of? | [
"styrofoam",
"concrete"
] | 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 packing peanuts.
The packing peanuts are made of styrofoam.
Packing peanuts keep breakable items safe. Styrofoam is a good material for packing peanuts because it's a little bit squishy. | ||
Which i in row B? | [
"the fire department",
"the grocery store",
"the police department",
"the gas station"
] | 0 | closed choice | grade3 | social science | geography | Geography | Use a letter-number grid | A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map.
A row is a line of squares that goes from side to side. Rows are marked with letters.
A column is a line of squares that goes up and down. Columns are marked with numbers. | The fire department is in row B. | ||
Not supported with pagination yet | Would you find the word did on a dictionary page with the following guide words?
dangle - drank | [
"no",
"yes"
] | 1 | yes or no | grade8 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since did is between the guide words dangle - drank, it would be found on that page. | |
Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Quito.
Quito is the capital of Ecuador. The winds there blow out of the northwest during the spring and summer each year.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | 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 ... | Read the passage carefully.
Quito is the capital of Ecuador. The winds there blow out of the northwest during the spring and summer each year.
The underlined part of the passage tells you about the usual wind patterns in Quito. This passage does not describe what the weather is like on a particular day. So, this passag... | |
Not supported with pagination yet | Based on this information, what is Arietta's genotype for the fur texture gene? | [
"Ff",
"straight fur"
] | 0 | In a group of Syrian hamsters, some individuals have straight fur and others have wavy fur. In this group, the gene for the fur texture trait has two alleles. The allele F is for straight fur, and the allele f is for wavy fur.
Arietta, a Syrian hamster from this group, has straight fur. Arietta has one allele for strai... | closed choice | grade7 | natural science | biology | Genes to traits | Genetics vocabulary: genotype and phenotype | All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ... | An organism's genotype for a gene is its combination of alleles for that gene. Arietta has one allele for straight fur (F) and one allele for wavy fur (f). So, Arietta's genotype for the fur texture gene is Ff. |
Not supported with pagination yet | What information supports the conclusion that Bonnie acquired this trait? | [
"Bonnie's friends like to make chili with her.",
"Bonnie learned how to make chili from a recipe book.",
"When Bonnie was young, her grandmother taught her how to cut chili peppers."
] | 1 | Read the description of a trait.
Bonnie knows how to make chili. | closed choice | grade8 | natural science | biology | Genes to traits | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits.... | |
Not supported with pagination yet | Which greeting is correct for a letter? | [
"Dear Uncle Aaron,",
"Dear Uncle aaron,"
] | 0 | closed choice | grade4 | language science | punctuation | Formatting | Greetings and closings of letters | A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue.
Dear Aunt Sue,
I'm glad you could come to my party, and
thank you for the birthday gift. I could not have
asked for a better one! Every time I... | The second greeting is correct:
Its first word is capitalized, and it ends with a comma. Uncle Aaron is capitalized because it is a proper noun. | |
Which statement describes the Gran Sabana ecosystem? | [
"It has soil that is poor in nutrients.",
"It has a small amount of rain."
] | 0 | Figure: Gran Sabana.
The Gran Sabana is a savanna grassland ecosystem in southeastern Venezuela. This savanna has many flat-topped mountains called mesas. | closed choice | 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 savanna grassland is a type of ecosystem. Savanna grasslands have the following features: warm summers and warm winters, a rainy season and a dry season, and soil that is poor in nutrients. So, the following statements describe the Gran Sabana ecosystem: warm summers and warm winters, a rainy season and a dry season,... | |
Not supported with pagination yet | What do these two changes have in common?
baking a loaf of bread
cooking a pancake | [
"Both are caused by cooling.",
"Both are chemical changes.",
"Both are only physical changes."
] | 1 | closed choice | grade3 | natural science | chemistry | Physical and chemical change | Compare physical and chemical changes | Chemical changes and physical changes are two common ways matter can change.
In a chemical change, the type of matter changes. The types of matter before and after a chemical change are always different.
Some chemical changes are caused by heating or cooling. For example, burning a piece of paper is a chemical change c... | Step 1: Think about each change.
Baking a loaf of bread is a chemical change. Bread is made from dough. Baking turns the dough into bread. The bread is a different type of matter than the dough.
Cooking a pancake is a chemical change. Pancakes are made from pancake batter. A cooked pancake is a different type of matter... | |
Which animal's skin is better adapted as a warning sign to ward off predators? | [
"hawk moth",
"lionfish"
] | 1 | Fire salamanders have poisonous glands in their brightly colored skin. The bright colors serve as a warning sign that the animal is poisonous. The 's skin is adapted to ward off predators.
Figure: fire salamander. | 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 fire salamander.
The fire salamander has a poisonous body with brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the fire salamander is poisonous.
Now look at each animal. Figure out which animal has a similar adaptation.
The lion... | |
Select the organism in the same species as the Burmese python. | [
"Python reticulatus",
"Cervus canadensis",
"Python bivittatus"
] | 2 | This organism is a Burmese python. Its scientific name is Python bivittatus. | 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 Burmese python's scientific name is Python bivittatus.
Cervus canadensis does not have the same scientific name as a Burmese python. So, Python bivittatus and Cervus canadensis are not in the same species.
Python bivittatus is in the same genus as Python reticulatus, but they are not in the same species.
Organisms in... | |
Which animal is also adapted to be camouflaged among dead leaves? | [
"snowy owl",
"plated leaf chameleon"
] | 1 | Fantastic leaf-tailed geckos live in tropical forests around the world. The is adapted to be camouflaged among dead leaves.
Figure: fantastic leaf-tailed gecko. | 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 fantastic leaf-tailed gecko.
The fantastic leaf-tailed gecko has reddish-brown skin and a leaf-shaped tail. 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 ... | |
Which is this organism's common name? | [
"Galapagos giant tortoise",
"Chelonoidis nigra"
] | 0 | This organism is a Galapagos giant tortoise. It is also called Chelonoidis nigra. | closed choice | grade8 | 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,... | Chelonoidis nigra is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Chelonoidis nigra is the organism's scientific name. So, you know that Galapagos giant tortoise is the common name. | |
Not supported with pagination yet | Suppose Eva decides to plant the tulips. Which result would be a cost? | [
"She will save some space. The tulips will use up less space than the hickory tree would have used up.",
"Eva will give up the chance to look at the hickory tree. She thinks it would have looked more beautiful than the tulips."
] | 1 | Eva is deciding whether to plant tulips or a hickory tree in her backyard. She wants to make her backyard more beautiful. But she also wants to leave space for doing fun things. | closed choice | grade5 | social science | economics | Basic economic principles | Costs and benefits | Before you decide to do something, it is often helpful to list costs and benefits.
Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need.
Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa... | This result is a cost. It involves giving up or spending something that Eva wants or needs:
Eva will give up the chance to look at the hickory tree. She thinks it would have looked more beautiful than the tulips. |
Select the organism in the same species as the snowshoe hare. | [
"Sciurus vulgaris",
"Erinaceus europaeus",
"Lepus americanus"
] | 2 | This organism is a snowshoe hare. Its scientific name is Lepus americanus. | 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 snowshoe hare's scientific name is Lepus americanus.
Sciurus vulgaris does not have the same scientific name as a snowshoe hare. So, Lepus americanus and Sciurus vulgaris are not in the same species.
Lepus americanus has the same scientific name as a snowshoe hare. So, these organisms are in the same species.
Erinace... | |
What is the capital of Utah? | [
"Salem",
"Salt Lake City",
"Provo",
"Helena"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | |||
Which of these cities is marked on the map? | [
"St. Louis",
"New Orleans",
"Houston",
"New York City"
] | 1 | closed choice | grade5 | social science | geography | Cities | Major U.S. cities | The city is New Orleans, Louisiana. New York City, Houston, and St. Louis are marked with gray circles on the map below. | |||
What is the name of the colony shown? | [
"Delaware",
"Pennsylvania",
"Maryland",
"New Jersey"
] | 1 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Pennsylvania. | |||
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"Bella had witnessed a crime, so she made a call to report it. They promptly dispatched police to investigate the scene.",
"Bella had witnessed a crime, so she made a call to report it. The operator promptly dispatched police to investigate the scene."
] | 0 | closed choice | grade11 | language science | writing-strategies | Pronouns | Identify vague pronoun references | When writing, make sure to avoid vague pronoun references. A vague pronoun reference occurs when a pronoun could refer to more than one possible antecedent.
When Lisa and Kim finally landed, she breathed a sigh of relief.
The pronoun she could refer to either Lisa or Kim, so the meaning of the sentence is unclear.
Vagu... | The second answer choice contains a vague pronoun reference. The pronoun they is used without its antecedent.
The first answer choice shows a possible correction for the vague pronoun reference. They has been replaced with the operator.
Bella had witnessed a crime, so she made a call to report it. The operator promptly... | |
Not supported with pagination yet | Based on this information, what is Hermes's phenotype for the coat pattern trait? | [
"a black coat",
"a spotted coat"
] | 1 | In a group of jaguars, some individuals have a black coat and others have a spotted coat. In this group, the gene for the coat pattern trait has two alleles. The allele for a black coat (A) is dominant over the allele for a spotted coat (a).
Hermes is a jaguar from this group. Hermes has the homozygous genotype aa for ... | closed choice | grade6 | natural science | biology | Genes to traits | Genetics vocabulary: dominant and recessive | All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ... | Hermes's genotype for the coat pattern gene is aa. Hermes's genotype of aa has only a alleles. The a allele is for a spotted coat. So, Hermes's phenotype for the coat pattern trait must be a spotted coat.
To check this answer, consider whether Hermes's alleles are dominant or recessive. The allele for a black coat (A) ... |
Not supported with pagination yet | What is the mass of an elephant? | [
"4,115 kilograms",
"4,115 grams"
] | 0 | Select the better estimate. | closed choice | grade5 | natural science | units-and-measurement | Units and measurement | Choose metric units of mass | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
Mass is a measurement of how much matter something contains.
There are many different units of mass. When you are using metric units, mass may be written with units of grams or kilograms.
There... | The better estimate for the mass of an elephant is 4,115 kilograms.
4,115 grams is too light. |
Which of these continents does the equator intersect? | [
"Australia",
"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 Australia or North America. | ||
Which of these continents does the equator intersect? | [
"North America",
"South America",
"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 South America. It does not intersect Antarctica or North America. | ||
Not supported with pagination yet | What kind of sentence is this?
Reagan considers Paris the most romantic city in the world. | [
"interrogative",
"exclamatory",
"declarative"
] | 2 | closed choice | grade9 | language science | punctuation | Sentences, fragments, and run-ons | Is the sentence declarative, interrogative, imperative, or exclamatory? | There are four kinds of sentences.
A declarative sentence is a statement and always ends with a period.
The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure.
An imperative sentence makes a request or a demand and usually ends with a period. If a demand shows strong feeling, it can ... | The sentence is a statement and ends with a period. It is a declarative sentence. | |
Which solution has a higher concentration of purple particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 0 | The diagram below is a model of two solutions. Each purple ball represents one particle of solute. | closed choice | grade8 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container.
Use the concentration formula to find the number of purple particles per mill... | |
Not supported with pagination yet | What is the source of the allusion in the sentence below?
Diana was known among her coworkers for her spartan ways. | [
"the Bible",
"Greek history"
] | 1 | closed choice | grade10 | language science | figurative-language | Literary devices | Recall the source of an allusion | An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words.
"I'd better get home before I turn into a pumpkin!" Lila remarked.
Here, Lila alludes to the fairy tale "Cinderella," in which C... | The source of the allusion spartan is Greek history.
Soldiers from the city of Sparta in ancient Greece were known for their self-restraint, self-discipline, and indifference to luxury.
The allusion spartan means simple and austere. | |
Not supported with pagination yet | Complete the sentence so that it uses personification.
The heavy door () as Edna pushed it open. | [
"protested",
"creaked"
] | 0 | closed choice | grade8 | language science | writing-strategies | Creative techniques | Use personification | Personification is giving human characteristics to nonhuman things. It is a figure of speech that can be used to make writing more interesting or to emphasize a point.
The trees danced in the wind.
The word danced describes the trees as if they were people. Unlike people, however, trees can't actually dance. Instead, t... | Complete the sentence with the word protested. It describes the door as if it were a person who didn't want to obey. | |
Not supported with pagination yet | Would you find the word material on a dictionary page with the following guide words?
midst - mosquito | [
"yes",
"no"
] | 1 | yes or no | grade4 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since material is not between the guide words midst - mosquito, it would not be found on that page. | |
What is the capital of Louisiana? | [
"Montpelier",
"Lansing",
"Baton Rouge",
"Birmingham"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Baton Rouge is the capital of Louisiana. | |||
What can Finn and Tiana trade to each get what they want? | [
"Tiana can trade her almonds for Finn's tomatoes.",
"Finn can trade his tomatoes for Tiana's sandwich.",
"Tiana can trade her broccoli for Finn's oranges.",
"Finn can trade his tomatoes for Tiana's broccoli."
] | 3 | 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.
Finn and Tiana open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Finn wanted broc... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Finn wanted broccoli in his lunch and Tiana was hoping for tomatoes. Look at the labeled part of the images.
Finn has tomatoes. Tiana 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. | ||
What is the name of the colony shown? | [
"Connecticut",
"New Jersey",
"Kentucky",
"Virginia"
] | 0 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Connecticut. | |||
Which animal's feet are also adapted for digging? | [
"Weddell seal",
"eastern mole"
] | 1 | 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 | 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 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 eastern mole has long, straight claws... | |
Not supported with pagination yet | Which closing is correct for a letter? | [
"Best Wishes,\nHelen",
"Best wishes,\nHelen"
] | 1 | closed choice | grade3 | language science | punctuation | Formatting | Greetings and closings of letters | A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue.
Dear Aunt Sue,
I'm glad you could come to my party, and
thank you for the birthday gift. I could not have
asked for a better one! Every time I... | The second closing is correct:
Its first word is capitalized, and it ends with a comma. | |
Not supported with pagination yet | Which logical fallacy is used in the text?
Mayor Preston wants to create more bicycle lanes in Bloomington. However, many citizens of Bloomington live far from work. It would not be realistic to force us to give up our cars and bike everywhere. | [
"appeal to nature: the assumption that natural things are always good",
"straw man: a misrepresentation of an opponent's position that makes it easier to argue against",
"guilt by association: a negative association intended to discredit someone or something"
] | 1 | closed choice | grade12 | language science | writing-strategies | Developing and supporting arguments | Classify logical fallacies | A strong argument uses valid reasoning and logic in support of a claim. When an argument or claim introduces irrelevant information or misrepresents the issues at hand, it may be committing a logical fallacy. Logical fallacies can hurt a writer's credibility and can lead readers to draw false conclusions.
A logical fal... | The text argues that Mayor Preston wants people to give up their cars. However, this misrepresents Mayor Preston's argument. Mayor Preston only wants to create more bike lanes. This illustrates a type of logical fallacy known as a straw man. | |
Not supported with pagination yet | Which type of sentence is this?
Aisha is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years. | [
"complex",
"compound-complex",
"simple",
"compound"
] | 1 | closed choice | grade9 | language science | grammar | Phrases and clauses | Is the sentence simple, compound, complex, or compound-complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought that can stand alone as a sentence. A dependent clause (or subordinate clause) is not a complete thought and cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alon... | The sentence is compound-complex. It is made up of two independent clauses and a dependent clause. The dependent clause begins with the relative pronoun which.
Aisha is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years. | |
Which ocean is highlighted? | [
"the Southern Ocean",
"the Pacific Ocean",
"the Atlantic Ocean",
"the Arctic Ocean"
] | 2 | 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. | ||
Not supported with pagination yet | Select the one animal that has all of the arachnid traits listed above. | [
"White-spotted octopuses have tentacles, which are also called arms. White-spotted octopuses can use their tentacles to reach between corals and grab fish. These octopuses have a soft red body with white spots.",
"Leaf-curling spiders spin webs with a leaf at the center. These spiders have an exoskeleton and eigh... | 1 | Arachnids are a group of animals with similar traits. The following traits can be used to identify arachnids:
They have eight legs.
They have an exoskeleton.
They have no antennae. Observe the animals and read the descriptions. | closed choice | grade5 | natural science | biology | Classification | Use evidence to classify animals | Scientists sort animals with similar traits into groups. This is called classification. Classification helps scientists learn about how animals live.
How do scientists classify animals? First, they make observations about an animal. Scientists observe the animal's traits, including its body parts and behavior. Then, sc... | To decide if an animal is part of a group, look at the traits of the group.
Arachnids have the following traits:
They have eight legs.
They have an exoskeleton.
They have no antennae.
Compare each animal's traits to the group's traits. Select the animal with traits similar to the group's traits.
A leaf-curling spider h... |
Not supported with pagination yet | What kind of sentence is this?
Please take some time to think about my offer before you respond. | [
"exclamatory",
"interrogative",
"imperative"
] | 2 | closed choice | grade6 | language science | punctuation | Sentences, fragments, and run-ons | Is the sentence declarative, interrogative, imperative, or exclamatory? | There are four kinds of sentences.
A declarative sentence is a statement, and it always ends with a period.
The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure.
An interrogative sentence is a question, and it always ends with a question mark.
Do you have any plans for the upcoming... | The sentence makes a request, so it is an imperative sentence. Here, it ends with a period. | |
What is the name of the colony shown? | [
"Connecticut",
"New Hampshire",
"Massachusetts",
"Wisconsin"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Connecticut. |
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