examples27

id: 16036

lecture: Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other. You can change the strength of a magnetic force between two magnets by changing the distance between them. The magnetic force is weaker when the magnets are farther apart.

question: Think about the magnetic force between the magnets in each pair. Which of the following statements is true?

choice: (A) The magnetic force is weaker in Pair 1. (B) The magnetic force is weaker in Pair 2. (C) The strength of the magnetic force is the same in both pairs.

context: 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.

answer: B

Rationale:

0: Magnets can pull or push on each other without touching.
1: When magnets attract, they pull together.
2: When magnets repel, they push apart.
3: These pulls and pushes between magnets are called magnetic forces.
4: The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
5: You can change the strength of a magnetic force between two magnets by changing the distance between them.
6: The magnetic force is weaker when the magnets are farther apart.
7: Distance affects the strength of the magnetic force.
8: When magnets are farther apart, the magnetic force between them is weaker.
9: The magnets in Pair 1 are farther apart than the magnets in Pair 2.
10: So, the magnetic force is weaker in Pair 1 than in Pair 2.
11: The answer is A.

generated_skill:

solution: Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker. The magnets in Pair 2 are farther apart than the magnets in Pair 1. So, the magnetic force is weaker in Pair 2 than in Pair 1.

skill: Compare strengths of magnetic forces

wrong_step_idx: 0

id: 16189

lecture: The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance. The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of each particle in the substance and the higher the average speed of the particles, the higher their average kinetic energy.

question: Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature?

choice: (A) sample A (B) sample B (C) neither; the samples have the same temperature

context: 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.

answer: A

Rationale:

0: The temperature of a substance depends on the average kinetic energy of the particles in the substance.
1: The higher the average kinetic energy of the particles, the higher the temperature of the substance.
2: The kinetic energy of a particle is determined by its mass and speed.
3: For a pure substance, the greater the mass of each particle in the substance and the higher the average speed of the particles, the higher their average kinetic energy.
4: The particles in both samples have the same average speed, but each particle in sample B has more mass than each particle in sample A.
5: So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
6: Because the particles in sample B have the higher average kinetic energy, sample B must have the higher temperature.
7: The answer is B.

generated_skill:

solution: Each particle in sample A has more mass than each particle in sample B. The particles in sample A also have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B. Because the particles in sample A have the higher average kinetic energy, sample A must have the higher temperature.

skill: Identify how particle motion affects temperature and pressure

wrong_step_idx: 0

id: 16192

lecture: A force is a push or a pull that one object applies to a second object. The direction of a push is away from the object that is pushing. The direction of a pull is toward the object that is pulling.

question: Which type of force from the man who is walking rolls the wheelchair along?

choice: (A) pull (B) push

context: Two friends go for a walk in the park. One man applies a force to his friend's wheelchair as he walks. So, the wheelchair rolls along in front of the man who is walking.

answer: B

Rationale:

0: A force is a push or a pull that one object applies to a second object.
1: The direction of a push is away from the object that is pushing.
2: The direction of a pull is toward the object that is pulling.
3: The man who is walking applies a force to the wheelchair.
4: This force rolls the wheelchair along.
5: The direction of this force is toward the man who is walking.
6: This force is a pull.
7: The answer is A.

generated_skill:

solution: The man who is walking applies a force to the wheelchair to roll it along. The direction of this force is away from the walking man. This force is a push.

skill: Identify pushes and pulls

wrong_step_idx: 0

id: 16202

lecture: 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 letters. If the second letters are the same, look at the third letters, and so on. If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order. For example, be comes before bed.

question: Which word would you find on a dictionary page with the following guide words? nickel - nurse

choice: (A) national (B) nozzle

context: N/A

answer: B

Rationale:

0: Guide words appear on each page of a dictionary.
1: They tell you the first word and last word on the page.
2: The other words on the page come between the guide words in alphabetical order.
3: To put words in alphabetical order, put them in order by their first letters.
4: If the first letters are the same, look at the second letters.
5: If the second letters are the same, look at the third letters, and so on.
6: If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order.
7: For example, be comes before bed.
8: Put the words in alphabetical order.
9: Since national is between the guide words nickel - nurse, it would be found on that page.
10: The answer is A.

generated_skill:

solution: Put the words in alphabetical order. Since nozzle is between the guide words nickel - nurse, it would be found on that page.

skill: Use guide words

wrong_step_idx: 0

id: 16228

lecture: Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south. Here are some examples of magnets. The north pole of each magnet is labeled N, and the south pole is labeled S. If opposite poles are closest to each other, the magnets attract. The magnets in the pair below attract. If the same, or like, poles are closest to each other, the magnets repel. The magnets in both pairs below repel.

question: Will these magnets attract or repel each other?

choice: (A) attract (B) repel

context: Two magnets are placed as shown.

answer: B

Rationale:

0: Magnets can pull or push on each other without touching.
1: When magnets attract, they pull together.
2: When magnets repel, they push apart.
3: Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends.
4: Every magnet has two poles: north and south.
5: Here are some examples of magnets.
6: The north pole of each magnet is labeled N, and the south pole is labeled S. If opposite poles are closest to each other, the magnets attract.
7: The magnets in the pair below attract.
8: If the same, or like, poles are closest to each other, the magnets repel.
9: The magnets in both pairs below repel.
10: To predict if these magnets will attract or repel, look at which poles are closest to each other.
11: The north pole of one magnet is closest to the south pole of the other magnet.
12: Opposite poles attract.
13: So, these magnets will attract each other.
14: The answer is A.

generated_skill:

solution: To predict if these magnets will attract or repel, look at which poles are closest to each other. The south pole of one magnet is closest to the south pole of the other magnet. Like poles repel. So, these magnets will repel each other.

skill: Identify magnets that attract or repel

wrong_step_idx: 0

id: 16283

lecture:

question: Complete the sentence. According to the Seventh Amendment, the () has the final say in deciding who wins a court case.

choice: (A) jury (B) Electoral College (C) judge (D) chief of police

context: N/A

answer: A

Rationale:

0: According to the Seventh Amendment, the judge has the final say in deciding who wins a court case.
1: The judge can choose to agree or disagree with the jury.
2: If the jury and the judge disagree, the judge's decision is final.
3: Part of the text of the Seventh Amendment is below.
4: What kind of trials does the amendment talk about?
5: In suits at common law.
6: .
7: .the right of trial by jury shall be preserved, and no fact tried by a jury, shall be otherwise re-examined in any court of the United States, than according to the rules of the common law.
8: The answer is C.

generated_skill:

solution: According to the Seventh Amendment, the jury has the final say in deciding who wins a court case. The judge is usually not allowed to change a jury's decision. A jury is a group of regular citizens who listen to a trial. Then they decide together which side is right. In the United States, juries are supposed to come from the area where the crime or disagreement took place. Most trial juries have between 6 and 12 people, called jurors. If you are an American citizen, you may be asked to be on a jury someday! Part of the text of the Seventh Amendment is below. What kind of trials does the amendment talk about? In suits at common law. . .the right of trial by jury shall be preserved, and no fact tried by a jury, shall be otherwise re-examined in any court of the United States, than according to the rules of the common law.

skill: The Bill of Rights

wrong_step_idx: 0

id: 16354

question: Would you find the word steel on a dictionary page with the following guide words? shadow - sleeve

choice: (A) yes (B) no

context: N/A

answer: B

Rationale:

0: Guide words appear on each page of a dictionary.
1: They tell you the first word and last word on the page.
2: The other words on the page come between the guide words in alphabetical order.
3: To put words in alphabetical order, put them in order by their first letters.
4: If the first letters are the same, look at the second letters.
5: If the second letters are the same, look at the third letters, and so on.
6: If one word is shorter, and there are no more letters to compare, then the shorter word comes first in alphabetical order.
7: For example, be comes before bed.
8: Put the words in alphabetical order.
9: Since steel is between the guide words shadow - sleeve, it would be found on that page.
10: The answer is A.

generated_skill:

solution: Put the words in alphabetical order. Since steel is not between the guide words shadow - sleeve, it would not be found on that page.

skill: Use guide words

wrong_step_idx: 0

id: 16466

lecture: In an environment, organisms interact with each other and with their nonliving surroundings. To help describe these interactions, ecologists use specific terms for different types of groups. A single organism is an individual. Individuals of the same species that live in the same place are part of a population. Multiple populations of different species that live in the same place are part of a community. Together, communities of living organisms and the nonliving parts of their environment make up an ecosystem.

question: Which of the following best describes a community on a coral reef in Hawaii?

choice: (A) the snowflake moray eels and the stareye parrotfish (B) a school of convict tangs (C) the sand, the rocks, and the coral

context: Read the passage. Then answer the question below. A coral reef in Hawaii has hundreds of fish species. Many of the fish are active during the day. For example, species such as convict tangs and stareye parrotfish swim in schools as they feed on seaweed that grows on the reef. At night, other fish species, such as snowflake moray eels, come out to hunt. When they are not active, some fish take shelter among the many species of coral on the reef. Other fish hide in the sand and rocks that cover the seafloor. Figure: a school of convict tangs on a Hawaiian coral reef.

answer: A

Rationale:

0: In an environment, organisms interact with each other and with their nonliving surroundings.
1: To help describe these interactions, ecologists use specific terms for different types of groups.
2: A single organism is an individual.
3: Individuals of the same species that live in the same place are part of a population.
4: Multiple populations of different species that live in the same place are part of a community.
5: Together, communities of living organisms and the nonliving parts of their environment make up an ecosystem.
6: The answer is B.

generated_skill:

solution:

skill: Describe populations, communities, and ecosystems

wrong_step_idx: 0

id: 16605

lecture: Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets, the more strongly the magnets attract or repel each other. You can change the magnitude of a magnetic force between two magnets by changing the distance between them. The magnitude of the magnetic force is greater when there is a smaller distance between the magnets.

question: Think about the magnetic force between the magnets in each pair. Which of the following statements is true?

choice: (A) The magnitude of the magnetic force is the same in both pairs. (B) The magnitude of the magnetic force is greater in Pair 2. (C) The magnitude of the magnetic force is greater in Pair 1.

context: 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 shapes.

answer: B

Rationale:

0: Magnets can pull or push on each other without touching.
1: When magnets attract, they pull together.
2: When magnets repel, they push apart.
3: These pulls and pushes between magnets are called magnetic forces.
4: The strength of a force is called its magnitude.
5: The greater the magnitude of the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
6: You can change the magnitude of a magnetic force between two magnets by changing the distance between them.
7: The magnitude of the magnetic force is greater when there is a smaller distance between the magnets.
8: Distance affects the magnitude of the magnetic force.
9: When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater.
10: There is a smaller distance between the magnets in Pair 1 than in Pair 2.
11: So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2.
12: The answer is C.

generated_skill:

solution: Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater. There is a smaller distance between the magnets in Pair 2 than in Pair 1. So, the magnitude of the magnetic force is greater in Pair 2 than in Pair 1.

skill: Compare magnitudes of magnetic forces

wrong_step_idx: 0

id: 16624

lecture: Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces. The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets, the more strongly the magnets attract or repel each other. You can change the magnitude of a magnetic force between two magnets by changing the distance between them. The magnitude of the magnetic force is greater when there is a smaller distance between the magnets.

question: Think about the magnetic force between the magnets in each pair. Which of the following statements is true?

choice: (A) The magnitude of the magnetic force is greater in Pair 1. (B) The magnitude of the magnetic force is greater in Pair 2. (C) The magnitude of the magnetic force is the same in both pairs.

context: 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.

answer: A

Rationale:

0: Magnets can pull or push on each other without touching.
1: When magnets attract, they pull together.
2: When magnets repel, they push apart.
3: These pulls and pushes between magnets are called magnetic forces.
4: The strength of a force is called its magnitude.
5: The greater the magnitude of the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
6: You can change the magnitude of a magnetic force between two magnets by changing the distance between them.
7: The magnitude of the magnetic force is greater when there is a smaller distance between the magnets.
8: The magnets in Pair 1 attract.
9: The magnets in Pair 2 repel.
10: But whether the magnets attract or repel affects only the direction of the magnetic force.
11: It does not affect the magnitude of the magnetic force.
12: Distance affects the magnitude of the magnetic force.
13: When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater.
14: There is a smaller distance between the magnets in Pair 2 than in Pair 1.
15: So, the magnitude of the magnetic force is greater in Pair 2 than in Pair 1.
16: The answer is B.

generated_skill:

solution: Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater. There is a smaller distance between the magnets in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2.

skill: Compare magnitudes of magnetic forces

wrong_step_idx: 0