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Complete the statement. Assume that the motorcycle's mass did not change. The gravitational potential energy stored between the motorcycle and Earth () as Josiah rode up the hill.
[ "increased", "stayed the same", "decreased" ]
0
Read the text about an object in motion. Josiah rode his motorcycle from the bottom of a hill to the top of the hill.
closed choice
grade7
natural science
physics
Kinetic and potential energy
Identify changes in gravitational potential energy
Gravitational potential energy is stored between any two objects. So, for every object on or near Earth, there is gravitational potential energy stored between the object and Earth. The amount of gravitational potential energy stored between an object and Earth depends on the mass of the object. The amount of gravitati...
Think about how the distance between the motorcycle and the center of Earth changed. The top of the hill is higher than the bottom of the hill. As Josiah rode toward the top of the hill, the distance between the motorcycle and the center of Earth increased. So, the gravitational potential energy stored between the moto...
Which sentence states a fact?
[ "Benjamin Franklin was smarter than most American presidents.", "Benjamin Franklin was never president of the United States." ]
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. Benjamin Franklin was never president of the United States. It can be proved by looking at a list of U.S. presidents. The second sentence states an opinion. Benjamin Franklin was smarter than most American presidents. Smarter shows what a person believes, thinks, or feels. Another pers...
What do these two changes have in common? a crayon melting in the sun a puddle freezing into ice on a cold night
[ "Both are caused by cooling.", "Both are only physical changes.", "Both are chemical changes.", "Both are caused by heating." ]
1
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. A crayon melting in the sun is a change of state. So, it is a physical change. The crayon changes state from solid to liquid. The crayon is still made of wax, even after it melts. A puddle freezing into ice on a cold night is a change of state. So, it is a physical change. Liquid water ...
Using only these supplies, which question can Dana investigate with an experiment?
[ "Do round rocks or flat rocks skip more times when thrown across the river?", "Do small rocks or large rocks skip more times when thrown across the river?", "Do rocks skip more times when thrown across a river or across a pond?" ]
1
Dana likes to skip rocks at the river. She notices that some of the rocks she throws skip off the surface of the water many times, while others skip once and then sink. She wonders what factors affect how well rocks skip on the water. So, she decides to design an experiment. She has the following supplies available: 10...
closed choice
grade6
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...
What is the mass of an eraser?
[ "42 grams", "42 kilograms" ]
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 eraser is 42 grams. 42 kilograms is too heavy.
Which logical fallacy is used in the text? I ate kielbasa right before my favorite football team won the championship back in 2006. Now, I always eat kielbasa before their games to carry them to victory.
[ "circular reasoning: an argument that supports a claim with the claim itself", "false causation: the assumption that because two things happened together, one caused the other" ]
1
closed choice
grade6
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 eating kielbasa before games makes the team win. However, even though the writer ate kielbasa before his or her team won in 2006, that doesn't necessarily mean that the kielbasa was responsible for the team's success. This illustrates a type of logical fallacy known as false causation.
Which would stretch more?
[ "rubber ballon", "steel beam" ]
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...
Stretchy is a property. A stretchy material gets longer when you pull on it. Look at each picture, one at a time. Imagine pulling on the material shown in each picture. Of the choices, the rubber ballon would stretch more. If you gently pull on a rubber balloon, it will get longer.
What is the source of the allusion in the sentence below? When I learned the details of Kiera's Faustian bargain, I was in disbelief.
[ "Roman mythology", "literature" ]
1
closed choice
grade7
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 Faustian bargain is literature. In a play by Christopher Marlowe based on the legend of Faust, a man strikes a deal with the devil. Disregarding the long-term consequences of his actions, he sells his soul in exchange for power. The allusion Faustian bargain means a compromise of one's values...
The movers lift the boxes at the same speed. Which box is lifted with a larger force?
[ "a box holding 21 pounds", "a box holding 31 pounds" ]
1
Two movers are putting heavy boxes into their truck. The boxes are the same shape and size. Each mover lifts one box up into the truck at a time.
closed choice
grade2
natural science
physics
Force and motion
How do mass and force affect motion?
A force is a push or a pull. A force can make an object start moving or stop an object that is moving. A force can also make an object speed up, slow down, or change direction. Forces can be different sizes. Think about trying to move a heavy object and a light object. Imagine you want to move them at the same speed. Y...
Look for the box that is heavier. A box holding 31 pounds is heavier than a box holding 21 pounds. So, the box holding 31 pounds needs a larger force to start moving upward at the same speed as the other box.
Which figure of speech is used in this text? Juan's room is as tidy as an overgrown garden.
[ "onomatopoeia", "verbal irony" ]
1
closed choice
grade10
language science
figurative-language
Literary devices
Classify figures 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. Alliteration is the repetition of sounds at the beginning of nearby words. What a lucky little lady you are! An allusion is a brief reference to something or someone well known, often from his...
The text uses verbal irony, which involves saying one thing but implying something very different. As tidy as an overgrown garden shows verbal irony because an overgrown garden is not tidy.
Which tense does the sentence use? Circus clowns amuse the young children.
[ "future tense", "present tense", "past tense" ]
1
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 present tense. You can tell because it uses a present-tense verb, amuse. The verb tells you about something that is true or happening now.
Is the following trait inherited or acquired? Stefan can play the clarinet.
[ "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...
People are not born knowing how to play the clarinet. Instead, some people learn how to play. So, playing the clarinet is an acquired trait.
Which closing is correct for a letter?
[ "thanks,\nWendy", "Thanks,\nWendy" ]
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.
Which closing is correct for a letter?
[ "Yours truly,\nKurt", "Yours Truly,\nKurt" ]
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 closing is correct: Its first word is capitalized, and it ends with a comma.
Does this passage describe the weather or the climate? Where Jon lives, the wind often blows in from the nearby hills.
[ "weather", "climate" ]
1
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
What's the difference between weather and climate?
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 text carefully. Where Jon lives, the wind often blows in from the nearby hills. This passage tells you about the usual wind pattern where Jon lives. It does not describe what the weather is like on a particular day. So, this passage describes the climate.
What is the source of the allusion in the sentence below? Looking at his life, we couldn't help but see Pablo as a Job-like figure.
[ "the Bible", "Greek mythology" ]
0
closed choice
grade11
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. The protean nature of the disease makes it difficult to diagnose. The word protean is an allusion to the sea god Proteus in Gree...
The source of the allusion Job is the Bible. In the Bible, Job remains faithful and loyal to God, even after the unjust loss of his possessions, family, and health. The allusion Job means someone who patiently endures adversity.
Select the liquid.
[ "pair of dice", "water droplets", "spoon", "chalk" ]
1
closed choice
grade3
natural science
physics
States of matter
Identify 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...
Chalk is a solid. You can easily break chalk into pieces. But each piece will still have a size and shape of its own. Water droplets are a liquid. A liquid takes the shape of any container it is in. If you collect water droplets in a bucket, they will take the shape of the bucket. But the water droplets will still take...
Based on this information, what is Mortimer's phenotype for the fur color trait?
[ "black fur", "FF" ]
0
In a group of rabbits, some individuals have black fur and others have brown fur. In this group, the gene for the fur color trait has two alleles. The allele F is for black fur, and the allele f is for brown fur. Mortimer, a rabbit from this group, has black fur. Mortimer has two alleles for black fur.
closed choice
grade8
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 phenotype for a trait is its observable version of that trait. Mortimer's observable version of the fur color trait is black fur. So, Mortimer's phenotype for the fur color trait is black fur.
What kind of sentence is this? Lucia considers Paris the most romantic city in the world.
[ "interrogative", "exclamatory", "declarative" ]
2
closed choice
grade10
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.
What is the source of the allusion in the sentence below? Looking at his life, we couldn't help but see Mitch as a Job-like figure.
[ "the Bible", "Greek mythology" ]
0
closed choice
grade11
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. The protean nature of the disease makes it difficult to diagnose. The word protean is an allusion to the sea god Proteus in Gree...
The source of the allusion Job is the Bible. In the Bible, Job remains faithful and loyal to God, even after the unjust loss of his possessions, family, and health. The allusion Job means someone who patiently endures adversity.
Is a globe a good or a service?
[ "a good", "a service" ]
0
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 a globe is a good or a service, ask these questions: Is a globe something you can touch? Yes. Is a globe a job you might pay someone else to do? No. So, a globe is a good.
What is the mass of a goat?
[ "35 grams", "35 kilograms" ]
1
Select the better estimate.
closed choice
grade4
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 a goat is 35 kilograms. 35 grams is too light.
What kind of sentence is this? How well does Jaylen play the guitar?
[ "interrogative", "imperative" ]
0
closed choice
grade5
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. It tells about something. A declarative sentence always ends with a period. I have an older brother and a younger sister. An interrogative sentence is a question. It asks something. An interrogative sentence always ends with a question mark. How ...
The sentence asks something, and it ends with a question mark. It is an interrogative sentence.
Which figure of speech is used in this text? "There's nothing I love more than skipping lunch," Mr. Gibson told the flight attendant when he learned that no food would be available on his cross-country flight.
[ "verbal irony", "personification" ]
0
closed choice
grade8
language science
figurative-language
Literary devices
Classify figures of speech
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Alliteration is the repetition of sounds at the beginning of nearby words. What a lucky little lady you are! An allusion is a brief reference to something or someone well known, often from his...
The text uses verbal irony, which involves saying one thing but implying something very different. Nothing I love more shows verbal irony because Mr. Gibson is probably upset that there isn't anything to eat.
Does this passage describe the weather or the climate? While at the park today, Elijah noticed that the wind was coming from the southwest.
[ "climate", "weather" ]
1
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
What's the difference between weather and climate?
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 text carefully. While at the park today, Elijah noticed that the wind was coming from the southwest. This passage tells you about the wind direction at the park today. It describes the atmosphere at a certain place and time. So, this passage describes the weather.
Which body part pumps blood through the body?
[ "stomach", "brain", "heart" ]
2
closed choice
grade2
natural science
biology
Animals
Body parts and their functions
Select the bird.
[ "porcupinefish", "keel-billed toucan", "red-spotted newt", "harbor seal" ]
1
closed choice
grade5
natural science
biology
Classification
Identify mammals, birds, fish, reptiles, and amphibians
Birds have feathers, two wings, and a beak.
A keel-billed toucan is a bird. It has feathers, two wings, and a beak. Toucans have large beaks. A toucan's beak can be half as long as its body. A porcupinefish is a fish. It lives underwater. It has fins, not limbs. Porcupinefish can puff up their bodies with air or water to scare off predators. A harbor seal is a m...
According to Newton's third law, what other force must be happening?
[ "The suitcase is pushing on Dean.", "The suitcase is pulling on Dean." ]
1
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: Dean is pulling on a full suitcase.
closed choice
grade8
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...
Dean is pulling on the suitcase. So, Newton's third law tells you that the suitcase is pulling on Dean.
How long is a potato?
[ "7 yards", "7 inches", "7 feet", "7 miles" ]
1
Select the best estimate.
closed choice
grade7
natural science
units-and-measurement
Units and measurement
Choose customary 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 customary units, length may be written with units of inches, feet, yards, or miles. There are 12 inches in 1 foot, and 3 feet in 1 yard. There are 5,280 feet in 1 mile. A foo...
The best estimate for the length of a potato is 7 inches. 7 feet, 7 yards, and 7 miles are all too long.
Is the following trait inherited or acquired? Bridget has five fingers on each hand.
[ "inherited", "acquired" ]
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...
Most humans are born with five fingers on each hand. So, having five fingers is an inherited trait.
What is the source of the allusion in the sentence below? Tyrone's remark about your new car is clearly a case of sour grapes.
[ "Greek mythology", "a fable" ]
1
closed choice
grade8
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 sour grapes is a fable. In the fable "The Fox and the Grapes," a fox tries unsuccessfully to reach a bunch of grapes. Because he cannot reach them and therefore cannot eat them, he tells himself that they must be sour. The allusion sour grapes means criticizing something because you can't hav...
Which tense does the sentence use? Akiko teaches Chloe about customs in Japan.
[ "past tense", "future tense", "present tense" ]
2
closed choice
grade5
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 present tense. You can tell because it uses a present-tense verb, teaches. The verb ends in -es and tells you about something that is true or happening now.
Which word does not rhyme?
[ "plan", "ran", "rain" ]
2
closed choice
grade1
language science
phonological-awareness
Rhyming
Which word does not rhyme?
Rhyming words are words that end with the same sound. The words tip and slip rhyme. They both end with the ip sound. The words lake and make rhyme. They both end with the ake sound. The words tip and lake don't rhyme. They end with different sounds.
The words ran and plan rhyme. They both end with the an sound. The word rain does not rhyme. It ends with a different sound.
Complete the sentence so that it uses personification. "You might think you'll always be young," Mrs. Stone counseled, "but time ()".
[ "creeps up on you", "affects everyone" ]
0
closed choice
grade9
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 creeps up on you. It describes time as if it were a sneaky person.
How long is a human front tooth?
[ "12 millimeters", "12 kilometers", "12 centimeters", "12 meters" ]
0
Select the best estimate.
closed choice
grade7
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 human front tooth is 12 millimeters. 12 centimeters, 12 meters, and 12 kilometers are all too long.
Which figure of speech is used in this text? Grace asked her mother if she could adopt a cat, and her mother replied, "It's a definite maybe," so Grace didn't want to get her hopes up.
[ "euphemism", "oxymoron" ]
1
closed choice
grade9
language science
figurative-language
Literary devices
Classify figures of speech: euphemism, hyperbole, oxymoron, paradox
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. A euphemism is a polite or indirect expression that is used to de-emphasize an unpleasant topic. The head of Human Resources would never refer to firing people, only to laying them off. Hyperb...
The text uses an oxymoron, a joining of two seemingly contradictory terms. Definite maybe is a contradiction, because definite describes something that is sure, and maybe refers to something that is unsure.
What information supports the conclusion that Daniel acquired this trait?
[ "Daniel knits sweaters using cotton, wool, and other types of yarn.", "Daniel learned how to knit in an after school program." ]
1
Read the description of a trait. Daniel knows how to knit sweaters.
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...
Which word does not rhyme?
[ "globe", "note", "robe" ]
1
closed choice
grade2
language science
phonological-awareness
Rhyming
Which word does not rhyme?
Rhyming words are words that end with the same sound. The words tip and slip rhyme. They both end with the same sound. The words meet and treat also rhyme. They both end with the same sound, even though the sound has two different spellings. The words tip and meet don't rhyme. They end with different sounds.
The words globe and robe rhyme. They both end with the obe sound. The word note does not rhyme. It ends with a different sound.
Would you find the word tub on a dictionary page with the following guide words? tax - theory
[ "no", "yes" ]
0
yes or no
grade3
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 tub is not between the guide words tax - theory, it would not be found on that page.
According to Newton's third law, what other force must be happening?
[ "The gas pedal is pulling on Susan's foot.", "The gas pedal is pushing on Susan's foot." ]
1
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: Susan's foot is pushing on her car's gas pedal.
closed choice
grade8
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...
Susan's foot is pushing on the gas pedal. So, Newton's third law tells you that the gas pedal is pushing on Susan's foot.
Would you find the word arrest on a dictionary page with the following guide words? act - axis
[ "yes", "no" ]
0
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 arrest is between the guide words act - axis, it would be found on that page.
Would you find the word laughter on a dictionary page with the following guide words? lever - litter
[ "yes", "no" ]
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 laughter is not between the guide words lever - litter, it would not be found on that page.
Which type of sentence is this? Natalie is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years.
[ "simple", "compound", "complex", "compound-complex" ]
3
closed choice
grade11
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. Natalie is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years.
Which logical fallacy is used in the text? I'm never setting foot in any seafood restaurant again. We just had a ridiculously overpriced dinner at Rafi's Seafood Hut, and I have no interest in repeating that experience.
[ "hasty generalization: a very broad claim based on very little evidence", "false causation: the assumption that because two things happened together, one caused the other" ]
0
closed choice
grade7
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 all seafood restaurants are overpriced. However, even though one seafood restaurant was overpriced, that doesn't necessarily mean that all seafood restaurants are overpriced. This illustrates a type of logical fallacy known as a hasty generalization.
What information supports the conclusion that Carmen acquired this trait?
[ "Carmen was not born knowing how to identify different bird calls. She had to learn this skill.", "Carmen likes to photograph birds at the zoo." ]
0
Read the description of a trait. Carmen is good at identifying birds from their calls.
closed choice
grade4
natural science
biology
Traits and 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...
Complete the sentence. An air freshener making a room smell nice is a ().
[ "chemical change", "physical change" ]
1
closed choice
grade5
natural science
chemistry
Physical and chemical change
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 new molecules. The types of molecules in matter before an...
An air freshener making a room smell nice is a change of state. So, it is a physical change. The matter in the air freshener is changing from solid to gas. This is called sublimation. The gas spreads to fill the room and changes the scent of the air. But it does not form a different type of matter.
Which figure of speech is used in this text? Where have you gone, Joe DiMaggio? A nation turns its lonely eyes to you . . . —Paul Simon, "Mrs. Robinson"
[ "chiasmus", "apostrophe" ]
1
closed choice
grade11
language science
figurative-language
Literary devices
Classify the figure of speech: anaphora, antithesis, apostrophe, assonance, chiasmus, understatement
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. Joe DiMaggio is a direct address to former baseball star Joe DiMaggio, an absent person.
What information supports the conclusion that Shelley inherited this trait?
[ "Shelley and her mother both have short hair.", "Shelley's parents were born with wavy hair. They passed down this trait to Shelley." ]
1
Read the description of a trait. Shelley has wavy hair.
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....
Select the one animal that has all of the bony fish traits listed above.
[ "Wels catfish have a bony skeleton and live in lakes, rivers, and coastal waters. Wels catfish eggs do not have shells for protection. Male catfish guard the eggs until they hatch.", "Gray tree frogs hatch from eggs without shells. They live underwater when they are tadpoles. They move onto land when they become ...
0
Bony fish are a group of animals with similar traits. The following traits can be used to identify bony fish: They have fins, not limbs. They live underwater. They have a skeleton made of bone. They make eggs with no shells. 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. Bony fish have the following traits: They have fins, not limbs. They live underwater. They have a skeleton made of bone. They make eggs with no shells. Compare each animal's traits to the group's traits. Select the animal with traits similar to...
Which of the following contains a vague pronoun reference?
[ "Emma and her sister posed for a photograph, but when the flash went off, Emma blinked.", "Emma and her sister posed for a photograph, but when the flash went off, she blinked." ]
1
closed choice
grade7
language science
writing-strategies
Pronouns and antecedents
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 she could refer to Emma or her sister. The first answer choice shows a possible correction for the vague pronoun reference. She has been replaced with Emma. Emma and her sister posed for a photograph, but when the flash went off, Emma blinked.
Select the item that doesn't belong.
[ "ruler", "clock", "timer", "watch" ]
0
closed choice
grade3
language science
vocabulary
Categories
Select the words that don't belong
Ruler doesn't belong. Timer, watch, and clock all name items you use to keep track of time.
Which logical fallacy is used in the text? I can't believe you'd hire Mike Campbell to watch your dog! Did you know that his friend adopted a dog but then took it back to the shelter after just one week?
[ "guilt by association: a negative association intended to discredit someone or something", "hasty generalization: a very broad claim based on very little evidence" ]
0
closed choice
grade6
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 Mike must be an irresponsible dog owner, because his friend was an irresponsible dog owner. However, even though Mike's friend was irresponsible, that doesn't necessarily mean that Mike is also irresponsible. This illustrates a type of logical fallacy known as guilt by association.
What do these two changes have in common? peeling a banana tying a shoelace
[ "Both are only physical changes.", "Both are caused by cooling.", "Both are caused by heating.", "Both are chemical changes." ]
0
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. Peeling a banana is a physical change. The peel is not covering the rest of the fruit anymore. But both the peel and the banana are still made of the same type of matter as before. Tying a shoelace is a physical change. The shoelace gets a different shape. But it is still made of the sa...
How long is a parking space?
[ "20 inches", "20 miles", "20 yards", "20 feet" ]
3
Select the best estimate.
closed choice
grade7
natural science
units-and-measurement
Units and measurement
Choose customary 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 customary units, length may be written with units of inches, feet, yards, or miles. There are 12 inches in 1 foot, and 3 feet in 1 yard. There are 5,280 feet in 1 mile. A foo...
The best estimate for the length of a parking space is 20 feet. 20 inches is too short. 20 yards and 20 miles are too long.
Is a purse a good or a service?
[ "a service", "a good" ]
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 a purse is a good or a service, ask these questions: Is a purse something you can touch? Yes. Is a purse a job you might pay someone else to do? No. So, a purse is a good.
Which logical fallacy is used in the text? We can't let Governor Merritt impose regulations on gas-guzzling cars! Soon enough, he'll start trying to ban all cars!
[ "slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences", "appeal to nature: the assumption that natural things are always good", "ad hominem: an attack against the person making the argument, rather than the argument itself" ]
0
closed choice
grade10
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 banning cars with low fuel efficiency would lead to a ban on all cars. However, this argument offers only an extreme outcome and ignores other possible outcomes. For instance, the law may be limited to cars with low fuel efficiency. This illustrates a type of logical fallacy known as the slippery s...
Which cover letter is more formal?
[ "Now that I've got my degree, I can't wait to try and get a job on your team.", "Now that I have earned my degree, I am eager to apply for a position on your team." ]
1
closed choice
grade11
language science
writing-strategies
Audience, purpose, and tone
Which text is most formal?
Informal writing is typically used in casual situations or when communicating with someone you know well. Informal language often expresses familiarity and tends to sound more like speech. It uses more conversational language, such as slang, idioms, abbreviations, imprecise language, and contractions. Formal writing is...
The second cover letter is more formal. It uses more elevated language (eager to apply, position). The other cover letter uses contractions and conversational language (I've got, can't wait, get a job).
Which type of sentence is this? As Dalton sat down on the rickety old chair, it abruptly collapsed beneath him.
[ "simple", "compound", "compound-complex", "complex" ]
3
closed choice
grade10
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 complex. It is made up of an independent clause and a dependent clause. The dependent clause begins with the subordinating conjunction as. As Dalton sat down on the rickety old chair, it abruptly collapsed beneath him.
Look at the word. Does it have a closed syllable or an open syllable? beg
[ "closed", "open" ]
0
closed choice
grade2
language science
word-study
Short and long vowels
Is the syllable open or closed?
Words are made up of syllables. Two kinds of syllables are closed and open. A closed syllable has one vowel and ends with a consonant. It usually has a short vowel sound. desk: short e kit / ten: short i / short e An open syllable ends with one vowel. It usually has a long vowel sound. go: long o he / ro: long e / long...
The word beg ends with a consonant and has a short vowel sound. So, it has a closed syllable.
What is the volume of a bowl of soup?
[ "280 liters", "280 milliliters" ]
1
Select the better estimate.
closed choice
grade5
natural science
units-and-measurement
Units and measurement
Choose metric units of volume
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Volume is a measurement of how much space something takes up. There are many different units of volume. When you are using metric units, volume may be written in units of milliliters or liters....
The better estimate for the volume of a bowl of soup is 280 milliliters. 280 liters is too much.
Which logical fallacy is used in the text? All of my friends are coming to my birthday party. If Miranda doesn't, she might as well tell me that she doesn't like me.
[ "false dichotomy: an argument that presents only two choices when more options exist", "red herring: the use of a completely unrelated topic or idea" ]
0
closed choice
grade6
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 if Miranda doesn't go to the speaker's birthday party, it means that she hates the speaker. However, there may be a number of reasons why Miranda wouldn't go to the party. This illustrates a type of logical fallacy known as a false dichotomy.
Does this passage describe the weather or the climate? Hassan noticed that the wind was blowing in from the ocean this afternoon.
[ "climate", "weather" ]
1
closed choice
grade5
natural science
earth-science
Weather and climate
What's the difference between weather and climate?
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 text carefully. Hassan noticed that the wind was blowing in from the ocean this afternoon. This passage tells you about the wind direction where Hassan was this afternoon. It describes the atmosphere at a certain place and time. So, this passage describes the weather.
Does the sentence use a simile or a metaphor? Mrs. Boyd is kind, and her heart is gold.
[ "simile", "metaphor" ]
1
closed choice
grade4
language science
figurative-language
Literary devices
Identify similes and metaphors
Similes and metaphors are figures of speech that compare two things that are not actually alike. A simile compares two things by saying that one is like the other. Similes often use the words like and as. My sister runs like a cheetah. The sister's running and a cheetah's running are compared using the word like. A che...
Mrs. Boyd is kind, and her heart is gold. The words heart and gold are compared without the word like or as. So, the sentence uses a metaphor.
Which word does not rhyme?
[ "stork", "cork", "rock" ]
2
closed choice
grade2
language science
phonological-awareness
Rhyming
Which word does not rhyme?
Rhyming words are words that end with the same sound. The words tip and slip rhyme. They both end with the same sound. The words meet and treat also rhyme. They both end with the same sound, even though the sound has two different spellings. The words tip and meet don't rhyme. They end with different sounds.
The words stork and cork rhyme. They both end with the ork sound. The word rock does not rhyme. It ends with a different sound.
What does the allusion in this text suggest? With the gutters clogged and water rising in the streets, Tanvi, who was watching the storm from her window, commented, "We're going to need an ark to get out of here."
[ "Tanvi plans to build a boat.", "Tanvi thinks the storm will cause major flooding." ]
1
closed choice
grade8
language science
figurative-language
Literary devices
Interpret figures of speech
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. An allusion is a brief reference to something or someone well known, often from history or literature. "I'd better get home before I turn into a pumpkin!" Lila remarked.
The text uses an allusion, a brief reference to someone or something well known. The allusion to an ark suggests that Tanvi thinks the storm will cause major flooding. In the Bible, it rains for forty days and forty nights; Noah, his family, and animals of every species survive the great flood in an ark that he builds.
Which graduation announcement is more formal?
[ "Shawn Morton is graduating, and we couldn't be more proud!", "We are proud to announce the graduation of Shawn Morton." ]
1
closed choice
grade9
language science
writing-strategies
Audience, purpose, and tone
Which text is most formal?
Informal writing is typically used in casual situations or when communicating with someone you know well. Informal language often expresses familiarity and tends to sound more like speech. It uses more conversational language, such as slang, idioms, abbreviations, imprecise language, and contractions. Formal writing is...
The second graduation announcement is more formal. It uses more ceremonious language (proud to announce). The other graduation announcement uses more conversational language (we couldn't be more proud!).
Which text uses the word ironic in its traditional sense?
[ "Last winter, Craig took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, he just missed a few of his college friends, who had been in Florida the previous week.", "Last winter, Craig took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, a rare sno...
1
closed choice
grade9
language science
writing-strategies
Word usage and nuance
Explore words with new or contested usages
Words change in meaning when speakers begin using them in new ways. For example, the word peruse once only meant to examine in detail, but it's now also commonly used to mean to look through in a casual manner. When a word changes in meaning, its correct usage is often debated. Although a newer sense of the word may be...
The second text uses ironic in its traditional sense: contrary to what was intended, often in an amusing way. It's ironic because Craig tried to get away from the snow but found himself in a snowstorm regardless. Last winter, Craig took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, a...
Suppose Kimberly decides to make potato soup. Which result would be a cost?
[ "The potato soup will be tastier than the beef barley soup would have been.", "Kimberly will spend more time making the potato soup than she would have spent making the beef barley soup." ]
1
Kimberly is deciding whether to make potato soup or beef barley soup for dinner. She wants dinner to be as tasty as possible. But she is also hungry and wants to eat soon.
closed choice
grade4
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 Kimberly wants or needs: Kimberly will spend more time making the potato soup than she would have spent making the beef barley soup.
Which type of sentence is this? As Harry sat down on the rickety old chair, it abruptly collapsed beneath him.
[ "simple", "complex", "compound-complex", "compound" ]
1
closed choice
grade8
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 complex. It is made up of an independent clause and a dependent clause. The dependent clause begins with the subordinating conjunction as. As Harry sat down on the rickety old chair, it abruptly collapsed beneath him.
Is this a run-on sentence? At Okunoin, Japan's largest cemetery, visitors will find some unusual memorials, there's even a monument to puffer fish that have died at the hands of chefs.
[ "no", "yes" ]
1
yes or no
grade12
language science
writing-strategies
Sentences, fragments, and run-ons
Identify run-on sentences
A sentence is a group of words that expresses a complete thought. The band I'm in has been rehearsing daily because we have a concert in two weeks. A run-on sentence is formed when two sentences are run together, joined by just a comma or by no punctuation at all. If only a comma is used, the run-on is called a comma s...
This is a run-on sentence. It is a comma splice formed from two sentences run together, joined by just a comma. At Okunoin, Japan's largest cemetery, visitors will find some unusual memorials, there's even a monument to puffer fish that have died at the hands of chefs. Here is one way to fix the run-on sentence: At Oku...
What information supports the conclusion that Diane inherited this trait?
[ "Some people use a hair dryer to straighten their hair. But Diane and her brothers have naturally straight hair.", "Both of Diane's biological parents have naturally black hair.", "When she was younger, Diane wore ribbons in her naturally black hair." ]
1
Read the description of a trait. Diane has naturally black hair.
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....
Which is a compound sentence?
[ "The package includes some old letters from my grandma to my dad and a broken pocket watch.", "Before the performance, Vicky tied a satin sash around her waist, and Nicole braided her hair." ]
1
closed choice
grade6
language science
grammar
Sentences, fragments, and run-ons
Is the sentence simple, compound, or complex?
A clause is a group of words that contains both a subject and a predicate. An independent clause is a complete thought. It can stand alone as a sentence. A dependent clause is not a complete thought. It cannot stand alone as a sentence. the oranges on our tree are ripe The clause can stand alone. It is independent. aft...
The second sentence is the compound sentence. It is made up of two independent clauses joined by the coordinating conjunction and. Before the performance, Vicky tied a satin sash around her waist, and Nicole braided her hair.
What information supports the conclusion that Ed acquired this trait?
[ "Ed learned how to knit in an after school program.", "Ed knits sweaters using cotton, wool, and other types of yarn." ]
0
Read the description of a trait. Ed 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....
What kind of sentence is this? In the game today, Norma hit a home run with bases loaded!
[ "declarative", "interrogative", "exclamatory" ]
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 that shows strong feeling and ends with an exclamation point. It is an exclamatory sentence.
Which correctly shows the title of an article?
[ "Sunrise on the Shutdown", "\"Sunrise on the Shutdown\"" ]
1
closed choice
grade3
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, or article should be in quotation marks. "You Are My Sunshine"
An article should be in quotation marks. The correct title is "Sunrise on the Shutdown."
Which closing is correct for a letter?
[ "Many Thanks,\nLiz", "Many thanks,\nLiz" ]
1
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 closing is correct: Its first word is capitalized, and it ends with a comma.
How long is a tennis racket?
[ "60 kilometers", "60 centimeters" ]
1
Select the better estimate.
closed choice
grade3
natural science
units-and-measurement
Units and measurement
Choose metric units of distance
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Imagine being told that a pencil is 16 long. You might be thinking, 16 what? Is the pencil 16 centimeters long? 16 meters? 16 kilometers? The number 16 on its own does not give you much informa...
The better estimate for the length of a tennis racket is 60 centimeters. 60 kilometers is too long.
What does the verbal irony in this text suggest? After a jog around the block, Jasmine collapsed on the couch and declared with a wheeze, "Well, I'm ready to run a marathon."
[ "Jasmine was out of shape.", "Jasmine plans to run more." ]
0
closed choice
grade6
language science
figurative-language
Literary devices
Interpret figures of speech
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Verbal irony involves saying one thing but implying something very different. People often use verbal irony when they are being sarcastic. Olivia seems thrilled that her car keeps breaking dow...
The text uses verbal irony, which involves saying one thing but implying something very different. Ready to run a marathon ironically suggests that Jasmine was out of shape. She was actually far from ready to run a marathon.
Which logical fallacy is used in the text? This fast food chain claims that they've served five billion people, so they must have the best hamburger in town. Five billion people can't be wrong!
[ "bandwagon fallacy: the assumption that the popular choice is automatically correct", "circular reasoning: an argument that supports a claim with the claim itself" ]
0
closed choice
grade8
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 the fast food chain has the best hamburger, because they've served five billion people. However, even though they've served five billion people, that doesn't necessarily mean that they have the best hamburger. This illustrates a type of logical fallacy known as the bandwagon fallacy.
Which figure of speech is used in this text? The city of Bloomington is currently experiencing a minor crisis. Its sanitation workers are on strike, and the garbage is piling up in the streets.
[ "paradox", "oxymoron" ]
1
closed choice
grade12
language science
figurative-language
Literary devices
Classify the figure of speech: euphemism, hyperbole, oxymoron, paradox
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. A euphemism is a polite or indirect expression that is used to de-emphasize an unpleasant topic. The head of Human Resources would never refer to firing people, only to laying them off. Hyperb...
The text uses an oxymoron, a joining of two seemingly contradictory terms. Minor crisis is a contradiction, because minor means small or insignificant, and a crisis is a large problem.
Is the following statement true or false? An animal cell has a cell membrane.
[ "true", "false" ]
0
true-or false
grade4
natural science
biology
Cells
Cell part functions: true or false
An animal cell has a cell membrane. This statement is true. Every cell has a cell membrane. The cell membrane controls which substances enter and leave the cell.
Using only these supplies, which question can Kevin investigate with an experiment?
[ "Which type of tree do the squirrels feed from most often?", "Do the squirrels eat walnuts from large feeders more often than from small feeders?", "Do the squirrels select sunflower seeds or walnuts more often?" ]
2
Kevin enjoys feeding the squirrels in his backyard. He notices that they spend a lot of time collecting seeds and nuts. He wonders about what factors affect which foods squirrels choose to collect. So, he decides to design an experiment. He has the following supplies available: two identical squirrel feeders a bag of s...
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...
Which tense does the sentence use? The anthropologists will go into the canyon.
[ "past tense", "present tense", "future tense" ]
2
closed choice
grade5
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, go. The verb tells you about something that is going to happen.
What do these two changes have in common? a piece of pear turning brown baking cookies
[ "Both are chemical changes.", "Both are caused by cooling.", "Both are only physical changes.", "Both are caused by heating." ]
0
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. A piece of a pear turning brown is a chemical change. The substances in the pear react with oxygen in the air and turn into a different type of matter. If you scrape off the brown part of the pear, the inside will still be white. The inside hasn't touched the air. So the chemical change...
Read the following excerpt from a student essay. How can the writer best improve his or her narrative voice? During our last game, our pitcher Felipe suddenly grabbed his wrist after throwing a fastball. Coach Hoffman asked him if he was OK, and Felipe said that it hurt. None of us knew what was wrong with him and he w...
[ "by using active voice", "by removing biased language", "by adding dialogue" ]
2
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 narrative voice by adding dialogue. For example, the writer could replace the underlined sentences with exchanges between Coach Hoffman and Felipe. During our last game, our pitcher Felipe suddenly grabbed his wrist after throwing a fastball. Coach Hoffman asked him if he was OK...
Select the one animal that has all of the amphibian traits listed above.
[ "Barn owls live on every continent except Antarctica. They have feathers, two wings, and a beak. They hatch from eggs with shells.", "California newts have moist, smooth skin that is brown and orange. Their eggs have no shells, but they are protected by a poisonous gel. Young California newts live in shallow pool...
1
Amphibians are a group of animals with similar traits. The following traits can be used to identify amphibians: They spend part of their lives in water and part on land. They have moist skin. They make eggs with no shells. Observe the animals and read the descriptions.
closed choice
grade5
natural science
biology
Classification
Use evidence to classify mammals, birds, fish, reptiles, and amphibians
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. Amphibians have the following traits: They spend part of their lives in water and part on land. They have moist skin. They make eggs with no shells. Compare each animal's traits to the group's traits. Select the animal with traits similar to th...
Complete the statement. Assume that Robert's mass did not change. The gravitational potential energy stored between Robert and Earth () as he rode the escalator.
[ "increased", "decreased", "stayed the same" ]
0
Read the text about a person in motion. Robert rode an escalator from the first floor to the second floor of a shopping mall.
closed choice
grade6
natural science
physics
Kinetic and potential energy
Identify changes in gravitational potential energy
Gravitational potential energy is stored between any two objects. So, for every object on or near Earth, there is gravitational potential energy stored between the object and Earth. The amount of gravitational potential energy stored between an object and Earth depends on the mass of the object. The amount of gravitati...
Think about how the distance between Robert and the center of Earth changed. The second floor is higher than the first floor. As he rode the escalator toward the second floor, the distance between Robert and the center of Earth increased. So, the gravitational potential energy stored between Robert and Earth increased ...
Which tense does the sentence use? The farmer will grow corn in that field.
[ "present tense", "past tense", "future tense" ]
2
closed choice
grade2
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, grow. The verb tells you about something that is going to happen.
Which is a compound sentence?
[ "The highway is full of cracks, so the workers are repairing it.", "The engine in the car makes a strange noise." ]
0
closed choice
grade3
language science
grammar
Sentences, fragments, and run-ons
Is the sentence simple or compound?
A simple sentence is a sentence with only one subject and predicate. The pitcher threw the ball to first base. A compound sentence is two simple sentences joined by a comma and a conjunction such as and, but, or, or so. The pitcher threw the ball, and the batter hit it. Some simple sentences have a compound subject or ...
The first sentence is the compound sentence. It is made up of two simple sentences joined by a comma and the conjunction so. The highway is full of cracks, so the workers are repairing it.
Select the one true statement.
[ "An animal cell has chloroplasts but not a cell wall.", "Chloroplasts use the energy from sunlight to make sugar for plant cells.", "Lysosomes are the sites where ribosomes build proteins in animal cells." ]
1
closed choice
grade7
natural science
biology
Cells
Compare cells and cell parts
Using only these supplies, which question can Jaden investigate with an experiment?
[ "Does a pie crust made with white flour burn more quickly when the pie is cooked in a glass pan or in an aluminum pan?", "Do pie crusts made with white flour burn less quickly when covered with aluminum foil or when left uncovered?", "Does a pie crust made with white flour burn more quickly than a pie crust mad...
0
Jaden is baking a pie. He notices that the crust burns before the pie is fully cooked. He wonders what factors affect whether a pie crust will burn in the oven. So, he decides to design an experiment. He has the following supplies available: ingredients for pumpkin pie filling ingredients for apple pie filling two pie ...
closed choice
grade8
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...
Select the animal.
[ "Tulips have a green stem.", "Flamingos walk and fly." ]
1
closed choice
grade2
natural science
biology
Classification
Identify plants and animals
Plants and animals are living things. Living things are called organisms. Plants come in many shapes and sizes. Most plants grow in the ground. They might grow leaves, flowers, and fruit. Plants cannot move around on their own like animals can. Animals also come in many shapes and sizes. Most animals can move around. A...
A tulip is a plant. It has a green stem. Tulips grow best in cool, dry places. A flamingo is an animal. It walks and flies. Flamingos live in large groups. These groups are called flocks.
How long is a seesaw?
[ "4 yards", "4 feet", "4 miles", "4 inches" ]
0
Select the best estimate.
closed choice
grade7
natural science
units-and-measurement
Units and measurement
Choose customary 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 customary units, length may be written with units of inches, feet, yards, or miles. There are 12 inches in 1 foot, and 3 feet in 1 yard. There are 5,280 feet in 1 mile. A foo...
The best estimate for the length of a seesaw is 4 yards. 4 inches and 4 feet are too short. 4 miles is too long.
Complete the sentence. Animals produce waste, which ().
[ "their bodies cannot use", "all stays in the animal's body forever", "is used to help the animal grow" ]
0
closed choice
grade4
natural science
biology
Animals
Body systems: removing waste
Waste is material within an animal's body that it cannot use. If waste builds up in an animal's body, it will make the animal sick. So, the waste must be removed. Excretion and elimination are two ways waste can be removed from an animal's body. Waste that is made by an animal's cells is removed by the excretory syste...
Animals produce material that their bodies cannot use. This material is waste.
Which of the following contains a vague pronoun reference?
[ "Nick waved goodbye to Tyler as his train pulled out of the station.", "As Tyler's train pulled out of the station, Nick waved goodbye to him." ]
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 his could refer to Nick or Tyler. Nick waved goodbye to Tyler as his train pulled out of the station. The first answer choice shows a possible correction for the vague pronoun reference. The text has been rewritten so that the meaning is clear. As...
Which logical fallacy is used in the text? Don't ever get a ride from Amanda. Her brother has been driving for only six months, and he's already gotten three speeding tickets.
[ "hasty generalization: a very broad claim based on very little evidence", "guilt by association: a negative association intended to discredit someone or something" ]
1
closed choice
grade8
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 Amanda must be a reckless driver, because her brother is a reckless driver. However, even though Amanda's brother is reckless, that doesn't necessarily mean that Amanda is, too. This illustrates a type of logical fallacy known as guilt by association.
Which is a complex sentence?
[ "Freedom of speech and trial by jury are two important rights in the United States Constitution.", "When the submarine surfaced, a crowd of people on the shore gathered and stared at the rare sight." ]
1
closed choice
grade5
language science
grammar
Sentences, fragments, and run-ons
Is the sentence simple, compound, or complex?
A clause is a group of words that contains both a subject and a predicate. An independent clause is a complete thought. It can stand alone as a sentence. A dependent clause is not a complete thought. It cannot stand alone as a sentence. the oranges on our tree are ripe The clause can stand alone. It is independent. aft...
The first sentence is the complex sentence. It is made up of an independent clause and a dependent clause. The dependent clause begins with the subordinating conjunction when. When the submarine surfaced, a crowd of people on the shore gathered and stared at the rare sight.
Complete the sentence. In this chemical reaction, propane is a ().
[ "reactant", "product" ]
0
This passage describes a chemical reaction. Read the passage. Then, follow the instructions below. Have you ever eaten food that was cooked on a grill? Some grills are powered by propane gas. The propane combines with oxygen in the air to make carbon dioxide gas and water vapor. This process releases energy in the form...
closed choice
grade7
natural science
chemistry
Chemical reactions
Identify reactants and products
A chemical change occurs when new substances are formed from existing substances. This process is called a chemical reaction. In a chemical reaction, one or more substances change into one or more different substances. During the reaction, the atoms of the original substances are rearranged to form other substances. Th...
Read the underlined text carefully. Look for information about what happens to propane in this chemical reaction. Have you ever eaten food that was cooked on a grill? Some grills are powered by propane gas. The propane combines with oxygen in the air to make carbon dioxide gas and water vapor. This process releases ene...
Which logical fallacy is used in the text? Eva claims that the Greenwood Ferrets' new quarterback is better than their old one. I think Eva is being unfair: the Ferrets' old quarterback wasn't a terrible player.
[ "guilt by association: a negative association intended to discredit someone or something", "straw man: a misrepresentation of an opponent's position that makes it easier to argue against", "circular reasoning: an argument that supports a claim with the claim itself" ]
1
closed choice
grade9
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 Eva thinks the Ferrets' old quarterback was a terrible player. But this misrepresents Eva's argument. Eva only claims that the Ferrets' new quarterback is better. This argument doesn't necessarily imply that the old quarterback was a bad player. This illustrates a type of logical fallacy known as a...
Is the following trait inherited or acquired? Cindy has five toes on each foot.
[ "inherited", "acquired" ]
0
Hint: Cindy was born with five toes on each foot.
closed choice
grade4
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...
Most humans are born with five toes on each foot. So, having five toes is an inherited trait.