examples6

id: 6981

lecture: A food web is a model. A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web shows how some organisms in an ecosystem can get their food. Arrows show how matter moves. A food web has arrows that point from one organism to another. Each arrow shows the direction that matter moves when one organism eats another organism. An arrow starts from the organism that is eaten. The arrow points to the organism that is doing the eating. An organism in a food web can have more than one arrow pointing from it. This shows that the organism is eaten by more than one other organism in the food web. An organism in a food web can also have more than one arrow pointing to it. This shows that the organism eats more than one other organism in the food web.

question: Which of the following organisms is the producer in this food web?

choice: (A) silver maple (B) beaver (C) gray fox (D) pine vole

context: Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia. 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.

answer: A

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: Producers do not eat other organisms.
15: So, in a food web, producers do not have arrows pointing to them from other organisms.
16: The silver maple does not have any arrows pointing to it.
17: So, the silver maple is a producer.
18: The beaver has arrows pointing to it from the silver maple and the swallowtail caterpillar.
19: So, the beaver is a consumer, not a producer.
20: The gray fox has arrows pointing to it from the swallowtail caterpillar and the pine vole.
21: So, the gray fox is a consumer, not a producer.
22: The pine vole has an arrow pointing to it from the persimmon tree.
23: The persimmon tree does not have any arrows pointing to it.
24: So, the pine vole is a producer.
25: The answer is D.

Wrong Steps:

0: So, the gray fox is a consumer, not a producer.
1: The pine vole has an arrow pointing to it from the persimmon tree.
2: The persimmon tree does not have any arrows pointing to it.
3: So, the pine vole is a producer.
4: The answer is D.

generated_skill: The missing skill in this context is the ability to analyze and interpret a food web diagram. The image shows a food web from Shenandoah National Park, a forest ecosystem in Virginia. A food web is a model that demonstrates how matter moves through an ecosystem, with arrows representing the flow of energy and nutrients between organisms. To identify the producer in this food web, one needs to understand the relationships between different organisms and their roles in the ecosystem. In this case, the silver maple is the producer, as it is not consumed by any other organisms in the food web and serves as a source of food for other organisms. The ability to analyze and interpret a food web diagram is essential for understanding the dynamics of an ecosystem and the interconnectedness of its various components.

solution: Producers do not eat other organisms. So, in a food web, producers do not have arrows pointing to them from other organisms. The persimmon tree does not have any arrows pointing to it. So, the persimmon tree is a producer. The gray fox has arrows pointing to it, so it is not a producer. The silver maple does not have any arrows pointing to it. So, the silver maple is a producer. The beaver has an arrow pointing to it, so it is not a producer. The pine vole has arrows pointing to it, so it is not a producer.

skill: Interpret food webs I

wrong_step_idx: 24

id: 7055

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 using magnets of different sizes. The magnitude of the magnetic force is smaller when the magnets are smaller.

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 smaller in Pair 2. (C) The magnitude of the magnetic force is smaller 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 sizes.

answer: C

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 using magnets of different sizes.
7: The magnitude of the magnetic force is smaller when the magnets are smaller.
8: The magnets in Pair 2 attract.
9: The magnets in Pair 1 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: Magnet sizes affect the magnitude of the magnetic force.
13: Imagine magnets that are the same shape and made of the same material.
14: The smaller the magnets, the smaller the magnitude of the magnetic force between them.
15: Magnet A is the same size in both pairs.
16: But Magnet B is smaller in Pair 2 than in Pair 1.
17: So, the magnitude of the magnetic force is smaller in Pair 2 than in Pair 1.
18: The answer is B.

Wrong Steps:

0: Magnet A is the same size in both pairs.
1: But Magnet B is smaller in Pair 2 than in Pair 1.
2: So, the magnitude of the magnetic force is smaller in Pair 2 than in Pair 1.
3: The answer is B.

generated_skill: The missing skill in the given context is the ability to analyze and compare the strength of magnetic forces between magnets of different sizes. The image shows two pairs of magnets, with one pair attracting and the other repelling. The correct answer is that the magnitude of the magnetic force is smaller in Pair 2, as the magnets in Pair 2 are smaller in size. The rationale provided is based on the understanding that the size of a magnet affects the strength of the magnetic force it exerts on other magnets. This understanding is essential to determine the strength of the magnetic force between magnets of different sizes.

solution: The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force. Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The smaller the magnets, the smaller the magnitude of the magnetic force between them. Magnet A is the same size in both pairs. But Magnet B is smaller in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is smaller in Pair 1 than in Pair 2.

skill: Compare magnitudes of magnetic forces

wrong_step_idx: 16

id: 7094

lecture: An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects by their properties is called classification.

question: Which property do these four objects have in common?

choice: (A) sticky (B) translucent (C) sweet

context: Select the best answer.

answer: B

Rationale:

0: An object has different properties.
1: A property of an object can tell you how it looks, feels, tastes, or smells.
2: Properties can also tell you how an object will behave when something happens to it.
3: Different objects can have properties in common.
4: You can use these properties to put objects into groups.
5: Grouping objects by their properties is called classification.
6: Look at each object.
7: For each object, decide if it has that property.
8: A sticky object can attach or stick to other things.
9: All four objects are sticky.
10: A translucent object lets light through.
11: But you cannot see clearly through a translucent object.
12: The honey is translucent, but the wet ice cube and the marbles are not.
13: Sugar has a sweet taste.
14: The wet ice cube and the marbles are not sweet.
15: The property that all four objects have in common is sticky.
16: The answer is A.

Wrong Steps:

0: Grouping objects by their properties is called classification.
1: Look at each object.
2: For each object, decide if it has that property.
3: A sticky object can attach or stick to other things.
4: All four objects are sticky.

generated_skill: The missing skill is the ability to identify and classify objects based on their properties. In the context of the image, the objects are sticky, and they are all translucent, which means they allow light to pass through but do not allow clear visibility. The objects are not sweet, as they are not sugary or have a sweet taste. By identifying and classifying the objects based on their properties, one can understand their characteristics and group them accordingly.

solution: Look at each object. For each object, decide if it has that property. A translucent object lets light through. But you cannot see clearly through a translucent object. All four objects are translucent. A sticky object can attach or stick to other things. The honey is sticky, but the marbles are not. Sugar has a sweet taste. The honey is sweet, but the wet ice cube and the marbles are not. The property that all four objects have in common is translucent.

skill: Compare properties of objects

wrong_step_idx: 9

id: 7336

lecture: Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces. Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (S). Here are some examples of magnets. Their poles are shown in different colors and labeled. Whether a magnet attracts or repels other magnets depends on the positions of its poles. 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) repel (B) attract

context: Two magnets are placed as shown.

answer: B

Rationale:

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

Wrong Steps:

0: If the same, or like, poles are closest to each other, the magnets repel.
1: The magnets in both pairs below repel.
2: To predict if these magnets will attract or repel, look at which poles are closest to each other.
3: The north pole of one magnet is closest to the north pole of the other magnet.
4: Like poles repel.

generated_skill: The missing skill in this context is understanding and applying the concept of magnetic poles and their interaction. The individual needs to be able to identify the poles of a magnet and determine whether they will attract or repel another magnet based on the orientation of their poles. This requires a basic understanding of magnetism and the ability to analyze the positions of the poles in the given image.

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 north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other.

skill: Identify magnets that attract or repel

wrong_step_idx: 14

id: 7367

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 stronger when the magnets are closer together.

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 stronger in Pair 1. (B) The strength of the magnetic force is the same in both pairs. (C) The magnetic force is stronger in Pair 2.

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: C

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 stronger when the magnets are closer together.
7: Distance affects the strength of the magnetic force.
8: When magnets are closer together, the magnetic force between them is stronger.
9: The magnets in Pair 1 are closer together than the magnets in Pair 2.
10: So, the magnetic force is stronger in Pair 1 than in Pair 2.
11: The answer is A.

Wrong Steps:

0: The magnetic force is stronger when the magnets are closer together.
1: Distance affects the strength of the magnetic force.
2: When magnets are closer together, the magnetic force between them is stronger.
3: The magnets in Pair 1 are closer together than the magnets in Pair 2.
4: So, the magnetic force is stronger in Pair 1 than in Pair 2.

generated_skill: The missing skill in this situation is the ability to analyze and compare the strength of the magnetic force between two pairs of magnets based on their distance and arrangement. The person needs to understand how the distance between magnets affects the magnetic force and how to determine which pair has a stronger magnetic force based on their positioning.

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

skill: Compare strengths of magnetic forces

wrong_step_idx: 9

id: 7428

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) 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.

answer: B

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.

Wrong Steps:

0: The higher the average kinetic energy of the particles, the higher the temperature of the substance.
1: The kinetic energy of a particle is determined by its mass and speed.
2: 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.
3: 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.
4: So, the particles in sample B have a higher average kinetic energy than the particles in sample A.

generated_skill: The model did not accurately observe the mass of each particle in each sample as shown in the image.

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: 4

id: 7462

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.

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.

Wrong Steps:

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

generated_skill: The missing skill in this context is understanding the relationship between the distance between magnets and the magnitude of the magnetic force between them. The student needs to be able to analyze the distance between the magnets in each pair and determine which pair has a smaller distance, leading to a greater magnetic force. This requires knowledge of how magnetic forces work and how distance affects the strength of the force.

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: 10

id: 7487

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 1. (C) The magnitude of the magnetic force is greater in Pair 2.

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 using magnets of different sizes.
7: The magnitude of the magnetic force is greater when the magnets are larger.
8: Magnet sizes affect the magnitude of the magnetic force.
9: Imagine magnets that are the same shape and made of the same material.
10: The larger the magnets, the greater the magnitude of the magnetic force between them.
11: Magnet A is the same size in both pairs.
12: But Magnet B is larger in Pair 2 than in Pair 1.
13: So, the magnitude of the magnetic force is greater in Pair 2 than in Pair 1.
14: The answer is C.

Wrong Steps:

0: Imagine magnets that are the same shape and made of the same material.
1: The larger the magnets, the greater the magnitude of the magnetic force between them.
2: Magnet A is the same size in both pairs.
3: But Magnet B is larger in Pair 2 than in Pair 1.
4: So, the magnitude of the magnetic force is greater in Pair 2 than in Pair 1.

generated_skill: The missing skill in this context is understanding the relationship between the size of magnets and the strength of the magnetic force between them. In the image, the magnets in different pairs do not affect each other, and all the magnets are made of the same material but come in different sizes. The rationale provided explains that the larger the magnets, the greater the magnitude of the magnetic force between them. However, the query does not require the understanding of the relationship between the size of magnets and the magnetic force, but rather the comparison of the magnetic force between the two pairs of magnets. The correct answer is (B) The magnitude of the magnetic force is greater in Pair 1, as the magnets in Pair 1 are larger than those in Pair 2.

solution: Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The larger the magnets, the greater the magnitude of the magnetic force between them. Magnet A is the same size in both pairs. But Magnet B is larger in Pair 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: 12

id: 7916

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 2. (B) The magnitude of the magnetic force is greater in Pair 1. (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 2 attract.
9: The magnets in Pair 1 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 1 than in Pair 2.
15: So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2.
16: The answer is B.

Wrong Steps:

0: Distance affects the magnitude of the magnetic force.
1: When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater.
2: There is a smaller distance between the magnets in Pair 1 than in Pair 2.
3: So, the magnitude of the magnetic force is greater in Pair 1 than in Pair 2.
4: The answer is B.

generated_skill: The missing skill in this context is understanding the relationship between the distance between magnets and the magnitude of the magnetic force between them. The rationale provided in the demonstration explains that the distance between magnets affects the magnitude of the magnetic force, with a smaller distance resulting in a greater force. However, the person answering the question did not apply this understanding to the given context, which led to the incorrect answer. The correct answer would have been to compare the distance between the magnets in each pair and determine which pair had a smaller distance, leading to a greater magnetic force.

solution: The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force. 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: 14

id: 8014

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

choice: (A) brown lemming (B) bilberry

context: Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada. A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem.

answer: B

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 mushroom.There are two paths matter can take from the brown lemming to the mushroom: brown lemming->earthworm->mushroom.
16: brown lemming->grizzly bear->mushroom.
17: bilberry.
18: The bilberry does not have any arrows pointing to it.
19: So, in this food web, matter does not move from the bilberry to the mushroom..
20: There are two paths matter can take from the rough-legged hawk to the mushroom: rough-legged hawk->earthworm->mushroom.
21: rough-legged hawk->grizzly bear->mushroom.
22: There is one path matter can take from the grizzly bear to the mushroom: grizzly bear->mushroom.
23: There is one path matter can take from the earthworm to the mushroom: earthworm->mushroom.
24: The answer is A.

Wrong Steps:

0: There are two paths matter can take from the rough-legged hawk to the mushroom: rough-legged hawk->earthworm->mushroom.
1: rough-legged hawk->grizzly bear->mushroom.
2: There is one path matter can take from the grizzly bear to the mushroom: grizzly bear->mushroom.
3: There is one path matter can take from the earthworm to the mushroom: earthworm->mushroom.
4: The answer is A.

generated_skill: The missing skill in this context is the ability to analyze and interpret a food web diagram. The image shows a food web from a tundra ecosystem in Nunavut, Canada, with arrows representing the movement of matter between organisms. To answer the query, one needs to understand how the food web works, identify the organisms involved, and follow the arrows to determine which organism contains matter that eventually moves to the mushroom. This requires knowledge of ecosystems, the relationships between organisms, and the flow of matter within an ecosystem.

solution: Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows to the mushroom.There is one path matter can take from the bilberry to the mushroom: bilberry->grizzly bear->mushroom. There is one path matter can take from the grizzly bear to the mushroom: grizzly bear->mushroom. There are two paths matter can take from the barren-ground caribou to the mushroom: barren-ground caribou->mushroom. barren-ground caribou->grizzly bear->mushroom. There are two paths matter can take from the lichen to the mushroom: lichen->barren-ground caribou->mushroom. lichen->barren-ground caribou->grizzly bear->mushroom. brown lemming. There are three arrows pointing from the brown lemming to other organisms. One arrow points to the Arctic fox. The only arrow pointing from the Arctic fox leads to the earthworm. The second arrow pointing from the brown lemming leads to the short-tailed weasel. The only arrow pointing from the short-tailed weasel leads to the snowy owl. The only arrow pointing from the snowy owl leads to the earthworm. The third arrow pointing from the brown lemming leads to the parasitic jaeger. The only arrow pointing from the parasitic jaeger leads to the rough-legged hawk. The only arrow pointing from the rough-legged hawk leads to the earthworm. No arrows point from the earthworm to any other organisms. So, in this food web, matter does not move from the brown lemming to the mushroom..

skill: Interpret food webs II

wrong_step_idx: 15