examples28

id: 16663

question: In this food web, which organism contains matter that eventually moves to the bat star?

choice: (A) zooplankton (B) orca

context: Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California. A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem.

gold answer: A

wrong prediction:

Rationale:

0: A food web is a model.
1: A food web shows where organisms in an ecosystem get their food.
2: Models can make things in nature easier to understand because models can represent complex things in a simpler way.
3: If a food web showed every organism in an ecosystem, the food web would be hard to understand.
4: So, each food web shows how some organisms in an ecosystem can get their food.
5: Arrows show how matter moves.
6: A food web has arrows that point from one organism to another.
7: Each arrow shows the direction that matter moves when one organism eats another organism.
8: An arrow starts from the organism that is eaten.
9: The arrow points to the organism that is doing the eating.
10: An organism in a food web can have more than one arrow pointing from it.
11: This shows that the organism is eaten by more than one other organism in the food web.
12: An organism in a food web can also have more than one arrow pointing to it.
13: This shows that the organism eats more than one other organism in the food web.
14: Use the arrows to follow how matter moves through this food web.
15: For each answer choice, try to find a path of arrows to the bat star.
16: The only arrow pointing from the zooplankton leads to the plainfin midshipman.
17: The only arrow pointing from the plainfin midshipman leads to the bat star.
18: So, in this food web, matter moves from the zooplankton to the bat star.
19: The only arrow pointing from the orca leads to the kelp bass.
20: The only arrow pointing from the kelp bass leads to the bat star.
21: So, in this food web, matter moves from the orca to the bat star.
22: The answer is B.

id: 16681

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, but some of them are different shapes.

gold answer: B

wrong prediction:

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 A.

id: 16765

question: Will these magnets attract or repel each other?

choice: (A) repel (B) attract

context: Two magnets are placed as shown. Hint: Magnets that attract pull together. Magnets that repel push apart.

gold answer: A

wrong prediction:

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, called north and south.
5: Here are some examples of magnets.
6: The north pole of each magnet is marked N, and the south pole is marked S. If different poles are closest to each other, the magnets attract.
7: The magnets in the pair below attract.
8: If the same poles are closest to each other, the magnets repel.
9: The magnets in both pairs below repel.
10: Will these magnets attract or repel?
11: To find out, look at which poles are closest to each other.
12: The north pole of one magnet is closest to the south pole of the other magnet.
13: Poles that are different attract.
14: So, these magnets will attract each other.
15: The answer is B.

id: 16813

question: Complete the text to describe the diagram. Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium.

choice: (A) to the right than to the left (B) to the left than to the right

context: The diagram below shows a solution with one solute. Each solute particle is represented by a green ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles. The diagram shows how the solution can change over time during the process of diffusion.

gold answer: B

wrong prediction:

Rationale:

0: In a solution, solute particles move and spread throughout the solvent.
1: The diagram below shows how a solution can change over time.
2: Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration.
3: This movement happens through the process of diffusion.
4: As a result of diffusion, the concentration of solute particles becomes equal throughout the solution.
5: When this happens, the solute particles reach equilibrium.
6: At equilibrium, the solute particles do not stop moving.
7: But their concentration throughout the solution stays the same.
8: Membranes, or thin boundaries, can divide solutions into parts.
9: A membrane is permeable to a solute when particles of the solute can pass through gaps in the membrane.
10: In this case, solute particles can move freely across the membrane from one side to the other.
11: So, for the solute particles to reach equilibrium, more particles will move across a permeable membrane from the side with a higher concentration of solute particles to the side with a lower concentration.
12: At equilibrium, the concentration on both sides of the membrane is equal.
13: Look at the diagram again.
14: It shows you how the solution changed during the process of diffusion.
15: Before the solute particles reached equilibrium, there were 6 solute particles on the left side of the membrane and 4 solute particles on the right side of the membrane.
16: When the solute particles reached equilibrium, there were 5 solute particles on each side of the membrane.
17: There was 1 more solute particle on the right side of the membrane than before.
18: So, for the solute particles to reach equilibrium, more solute particles must have moved across the membrane to the right than to the left.
19: The answer is A.

id: 16875

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

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

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.

gold answer: B

wrong prediction:

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 C.

id: 16895

question: Which is a complete sentence?

choice: (A) We went to Texas, we saw an old fort. (B) The little boy popped a big bubble.

gold answer: B

wrong prediction:

Rationale:

0: A sentence is a group of words that forms a complete thought.
1: It has both a subject and a verb.
2: My friends walk along the path.
3: A run-on sentence is made up of two sentences that are joined without end punctuation or with just a comma.
4: I knocked on the door it opened.
5: It started raining, we ran inside.
6: To fix a run-on sentence, separate it into two sentences.
7: Add end punctuation after the first sentence, and capitalize the second sentence.
8: I knocked on the door.
9: It opened.
10: It started raining.
11: We ran inside.
12: You can also fix a run-on sentence by rewriting it as a compound sentence.
13: A compound sentence is two sentences joined by a comma and a conjunction such as and, but, or, or so.
14: I knocked on the door, and it opened.
15: It started raining, so we ran inside.
16: We went to Texas, we saw an old fort is a run-on sentence.
17: It has two sentences that are joined by just a comma: We went to Texas and We saw an old fort.
18: The answer is A.

id: 16929

question: Which word does not rhyme?

choice: (A) torn (B) corn (C) fern

gold answer: C

wrong prediction:

Rationale:

0: Rhyming words are words that end with the same sound.
1: The words tip and slip rhyme.
2: They both end with the same sound.
3: The words meet and treat also rhyme.
4: They both end with the same sound, even though the sound has two different spellings.
5: The words tip and meet don't rhyme.
6: They end with different sounds.
7: The words fern and torn rhyme.
8: They both end with the orn sound.
9: The word corn does not rhyme.
10: It ends with a different sound.
11: The answer is B.

id: 17026

question: What is the volume of a small can of tomato sauce?

choice: (A) 2 fluid ounces (B) 2 cups (C) 2 gallons

context: Select the best estimate.

gold answer: B

wrong prediction:

Rationale:

0: Measurements are written with both a number and a unit.
1: The unit comes after the number.
2: The unit shows what the number means.
3: Volume is a measurement of how much space something takes up.
4: There are many different units of volume.
5: When you are using customary units, volume may be written in units of fluid ounces, cups, or gallons.
6: As the diagram shows, there are 8 fluid ounces in 1 cup and 16 cups in 1 gallon.
7: So, 1 fluid ounce is less than 1 cup and much less than 1 gallon.
8: A glass of milk has a volume of about 8 fluid ounces, or 1 cup.
9: A jug of milk has a volume of 1 gallon.
10: The best estimate for the volume of a small can of tomato sauce is 2 fluid ounces.
11: 2 cups and 2 gallons are both too much.
12: The answer is A.

id: 17072

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

choice: (A) easy (B) elf

gold answer: B

wrong prediction:

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: Put the words in alphabetical order.
7: Since easy is between the guide words egg - every, it would be found on that page.
8: The answer is A.

id: 17105

choice: (A) to the right than to the left (B) to the left than to the right

gold answer: A

wrong prediction:

Rationale:

0: In a solution, solute particles move and spread throughout the solvent.
1: The diagram below shows how a solution can change over time.
2: Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration.
3: This movement happens through the process of diffusion.
4: As a result of diffusion, the concentration of solute particles becomes equal throughout the solution.
5: When this happens, the solute particles reach equilibrium.
6: At equilibrium, the solute particles do not stop moving.
7: But their concentration throughout the solution stays the same.
8: Membranes, or thin boundaries, can divide solutions into parts.
9: A membrane is permeable to a solute when particles of the solute can pass through gaps in the membrane.
10: In this case, solute particles can move freely across the membrane from one side to the other.
11: So, for the solute particles to reach equilibrium, more particles will move across a permeable membrane from the side with a higher concentration of solute particles to the side with a lower concentration.
12: At equilibrium, the concentration on both sides of the membrane is equal.
13: Look at the diagram again.
14: It shows you how the solution changed during the process of diffusion.
15: Before the solute particles reached equilibrium, there were 2 solute particles on the left side of the membrane and 6 solute particles on the right side of the membrane.
16: When the solute particles reached equilibrium, there were 4 solute particles on each side of the membrane.
17: There were 2 more solute particles on the left side of the membrane than before.
18: So, for the solute particles to reach equilibrium, more solute particles must have moved across the membrane to the left than to the right.
19: The answer is B.