5th Grade Science Quiz: Connect Animal Energy To Sun
20 questions · exam conditions
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Connect Animal Energy To SunQuestion 1 of 20

A wolf runs to hunt deer; trace the wolf's energy back to its original source.

the deer it ate
plants in the forest
the sun
water in the river
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5th Grade Science Quiz

5th Grade Science Quiz: Connect Animal Energy To Sun

Practice Connect Animal Energy To Sun in 5th Grade Science with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Connect Animal Energy To Sun, giving you a quick way to practice the rules, question types, and explanations that matter most for 5th Grade Science.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

A wolf runs to hunt deer; trace the wolf's energy back to its original source.

  1. the deer it ate
  2. plants in the forest
  3. the sun (correct answer)
  4. water in the river
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice C is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The wolf uses energy to run. Where did that energy come from? [The deer it ate] Where did the deer get its energy? [The plants it ate] Where did the plants get their energy? [The sun through photosynthesis!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Wolf ← Deer ← Plants ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'The wolf's immediate energy source is the deer (what it just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 2

A rabbit hops and grows after eating grass; where did its energy originally come from?

  1. the grass it ate
  2. the sun (correct answer)
  3. the moon and stars
  4. the rabbit's muscles
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice B is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The rabbit uses energy to hop. Where did that energy come from? [The grass it ate] Where did the grass get its energy? [The sun through photosynthesis!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Rabbit ← Grass ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'The rabbit's immediate energy source is the grass (what it just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 3

A mouse runs after eating seeds; tracing back, what is the ultimate energy source?

  1. the seeds it ate
  2. the plant that grew seeds
  3. the Earth's energy
  4. light from the sun (correct answer)
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the ultimate source of the mouse's running energy, we trace backward through the food chain. Start with the mouse: Where did it get its energy? From the seeds it ate. Where did the seeds get their energy? From the plant that grew them. Where did the plant get its energy? From the sun through photosynthesis. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy stored in seeds. Choice D is correct because it identifies light from the sun as the ultimate energy source. This demonstrates understanding that even though the mouse ate seeds, when you trace all the way back, the energy originally came from the sun, which the plant captured through photosynthesis to make those seeds. Choice A fails because it stops at an intermediate step (the seeds) without tracing all the way back to the sun. Choice C fails because 'the Earth's energy' is vague and incorrect—the Earth doesn't provide energy to living things; the sun does. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with the mouse running: 'The mouse uses energy to run. Where did that energy come from? [The seeds it ate] Where did the seeds get their energy? [The plant that made them] Where did the plant get energy? [Light from the sun!]' Create visual arrows going backward: Mouse ← Seeds ← Plant ← Sun. Emphasize that seeds are just stored plant energy, which originally came from the sun.

Question 4

A wolf uses energy to run; tracing back, where did that energy originally come from?

  1. the deer it ate
  2. the grass the deer ate
  3. sunlight from the sun (correct answer)
  4. nutrients in the soil
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? The wolf got energy from the deer it ate. Where did the deer get its energy? From the grass it ate. Where did the grass get its energy? From the sun through photosynthesis. No matter how many steps you trace backward, when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice C is correct because it identifies sunlight from the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (grass → deer → wolf), when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (the deer) without tracing all the way back to the sun. The question asks for the ORIGINAL source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The wolf uses energy to run. Where did that energy come from? [The deer it ate] Where did the deer get its energy? [The grass it ate] Where did the grass get its energy? [The sun!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source.

Question 5

A bear grows after eating berries; tracing energy back, what is the ultimate source?

  1. the berry plant
  2. the bear's body
  3. the sun's energy (correct answer)
  4. water in the berries
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the ultimate source of a bear's growth energy after eating berries, we trace backward through the food chain: The bear got energy from the berries → the berry plant made berries using energy from the sun through photosynthesis. Since the bear ate plant material directly, the pathway is short but still leads to the sun as the ultimate source. Choice C is correct because it identifies the sun's energy as the ultimate source, demonstrating understanding that even though the bear gets energy directly from berry plants, those plants captured and stored the sun's energy in their berries through photosynthesis. Choice A fails because it stops at the berry plant without tracing to where the plant got its energy; Choice B incorrectly suggests the bear's body creates energy rather than obtaining it from food; Choice D identifies water in berries, which provides hydration but not the energy for growth. To help students understand fruit energy pathways: Use the 'keep asking where' technique—'The bear uses energy to grow. Where did it get that? [Berries] Where did the berry plant get energy to make berries? [The sun!]' Emphasize that fruits and berries are plant parts storing the sun's energy. Create visual diagrams: Bear ← Berries ← Berry Plant ← Sun, showing how the sun's energy is captured by plants and stored in their fruits.

Question 6

A bear uses energy to stay warm; trace its food-chain energy back to the original source.​

  1. berries it ate
  2. the sun (correct answer)
  3. water in streams
  4. the bear's body
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice B is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The bear uses energy to stay warm. Where did that energy come from? [The berries it ate] Where did the berries get their energy? [The plant made them using sunlight] Where did the plant get energy? [The sun!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Bear ← Berries ← Plant ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'The bear's immediate energy source is the berries (what it just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 7

A bear uses energy to stay warm; trace its food-chain energy back to the original source.

  1. berries it ate
  2. the sun (correct answer)
  3. water in streams
  4. the bear's body
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice B is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The bear uses energy to stay warm. Where did that energy come from? [The berries it ate] Where did the berries get their energy? [The plant made them using sunlight] Where did the plant get energy? [The sun!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Bear ← Berries ← Plant ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'The bear's immediate energy source is the berries (what it just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 8

Chen plays soccer after a chicken sandwich; where did that energy originally come from?​

  1. the chicken he ate
  2. the corn plant
  3. the sun (correct answer)
  4. water from rain
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice C is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'Chen uses energy to play soccer. Where did that energy come from? [The chicken he ate] Where did the chicken get its energy? [The corn it ate] Where did the corn get its energy? [The sun through photosynthesis!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Chen ← Chicken ← Corn ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'Chen's immediate energy source is the chicken (what he just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 9

A rabbit hops using energy; tracing the pathway back, what is the ultimate source?

  1. the grass it ate
  2. the sun (correct answer)
  3. water in the grass
  4. air the rabbit breathes
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the ultimate source of a rabbit's hopping energy, we trace backward through the food chain: The rabbit got energy from the grass it ate → the grass got energy from the sun through photosynthesis. As an herbivore, the rabbit has a direct connection to plants, making the pathway to the sun shorter but the sun remains the ultimate source. Choice B is correct because it identifies the sun as the ultimate source of energy, demonstrating understanding that even though rabbits eat plants directly, those plants captured their energy from the sun, making the sun the original source of the rabbit's movement energy. Choice A fails because it stops at what the rabbit ate (grass) without tracing to where grass gets its energy; Choice C incorrectly identifies water, which is necessary for life but doesn't provide energy; Choice D suggests air, which provides oxygen for releasing energy but not the energy itself. To help students trace herbivore energy: Use the 'keep asking where' technique—'The rabbit uses energy to hop. Where did it get that energy? [The grass] Where did the grass get energy? [The sun!]' Create simple two-step diagrams: Rabbit ← Grass ← Sun with bright sunbeams to show the sun as the starting point. Emphasize that herbivores have shorter pathways but the ultimate answer is always the sun.

Question 10

A lizard moves using energy from insects; tracing back, the original source is what?​

  1. the insects it ate
  2. plants the insects ate
  3. the sun (correct answer)
  4. nutrients in soil
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice C is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The lizard uses energy to move. Where did that energy come from? [The insects it ate] Where did the insects get their energy? [The plants they ate] Where did the plants get their energy? [The sun through photosynthesis!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Lizard ← Insects ← Plants ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'The lizard's immediate energy source is the insects (what it just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 11

A heron uses energy to hunt fish; tracing backward, what is the original source?

  1. the large fish it ate
  2. algae in the pond
  3. the moon and stars
  4. the sun (correct answer)
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of a heron's energy, we trace backward through the aquatic food chain. Start with the bird: Where did it get its energy? The heron got energy from the large fish it ate. Where did the large fish get its energy? From smaller fish or other aquatic organisms. Where did they get their energy? Eventually, we trace back to algae (aquatic plants). Where did the algae get their energy? From the sun through photosynthesis. Choice D is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even in aquatic food chains with many steps (algae → small organisms → small fish → large fish → heron), when you trace all the way back, the energy originally came from the sun. Choice A fails because it stops at an intermediate step (the large fish), while choice B stops at algae without tracing to the sun. Choice C incorrectly suggests the moon and stars, which don't provide energy for life. To help students trace energy in aquatic systems: Teach that water food chains work the same way—they all start with the sun. Use the 'keep asking where' technique: 'Heron → Fish → Smaller fish → Tiny organisms → Algae → Sun!' Emphasize that whether on land or in water, the sun is ALWAYS the ultimate source.

Question 12

A wolf runs to hunt deer; trace the wolf's energy back to its original source.​

  1. the deer it ate
  2. plants in the forest
  3. the sun (correct answer)
  4. water in the river
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice C is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The wolf uses energy to run. Where did that energy come from? [The deer it ate] Where did the deer get its energy? [The plants it ate] Where did the plants get their energy? [The sun through photosynthesis!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Wolf ← Deer ← Plants ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'The wolf's immediate energy source is the deer (what it just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 13

A deer grows and stays warm; tracing back, its energy originally came from what?​

  1. plants it ate
  2. the sun (correct answer)
  3. the soil
  4. the deer's body
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice B is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The deer uses energy to grow. Where did that energy come from? [The plants it ate] Where did the plants get their energy? [The sun through photosynthesis!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Deer ← Plants ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'The deer's immediate energy source is the plants (what it just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 14

A snake slithers after eating a mouse; the snake's energy ultimately came from what?​

  1. the mouse it ate
  2. the seeds the mouse ate
  3. the sun (correct answer)
  4. the air around it
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? [From the food it ate.] Where did that food get its energy? [If it ate a plant, the plant got energy from the sun. If it ate another animal, where did that animal get its energy? From its food...keep tracing.] Keep asking 'where did that energy come from?' until you reach plants. Where do plants get their energy? From the sun through photosynthesis. No matter how many steps you trace backward—even if the animal ate an animal that ate an animal that ate a plant—when you reach the plant, you've reached the connection to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice C is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plant → herbivore → carnivore), and even though the animal may be several steps away from plants, when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (like plants or another animal) without tracing all the way back to the sun. The question asks for the ORIGINAL or ULTIMATE source—we must trace all the way back through the entire food chain until we reach the sun. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with any animal and its activity: 'The snake uses energy to slither. Where did that energy come from? [The mouse it ate] Where did the mouse get its energy? [The seeds it ate] Where did the seeds get their energy? [The plant made them using sunlight] Where did the plant get energy? [The sun!]' Practice with multiple food chains, always tracing back until reaching the sun. Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Snake ← Mouse ← Seeds ← Plant ← Sun. Draw sunbeams at the start of every food chain to show sun is where it all begins. Use the phrase 'originally came from the sun' repeatedly. Compare immediate source vs ultimate source: 'The snake's immediate energy source is the mouse (what it just ate), but the ultimate source—the original source—is the sun (which the plant captured and all the energy came from).' Watch for: Students who stop tracing too early (at the plant, or at the animal eaten), or who confuse materials (water, soil) with energy source. Always reinforce: Trace all the way back. The answer is always the sun.

Question 15

A lizard moves after eating insects; tracing energy back, what is the original source?

  1. the insects it ate
  2. food it finds
  3. the sun (correct answer)
  4. nutrients from soil
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of a lizard's movement energy, we trace backward through the food chain: The lizard got energy from the insects it ate → the insects got energy from plants they ate → the plants got energy from the sun through photosynthesis. Even though the lizard is an insectivore, tracing the complete pathway leads back to the sun. Choice C is correct because it identifies the sun as the original source, showing understanding that the lizard's energy can be traced through insects back to plants and ultimately to the sun's energy captured through photosynthesis. Choice A fails because it stops at what the lizard ate directly (insects) without tracing further back; Choice B is too vague saying 'food it finds' without identifying the ultimate source; Choice D incorrectly suggests nutrients from soil, which provide materials but not energy. To help students trace insectivore energy pathways: Practice the 'keep asking where' technique—'The lizard uses energy to move. Where did it get that? [Insects] Where did insects get energy? [Plants they ate] Where did plants get energy? [The sun!]' Draw the complete chain: Lizard ← Insects ← Plants ← Sun, emphasizing that whether animals eat plants, other animals, or insects, we always trace back to the sun as the original energy source.

Question 16

A fox uses energy to stay warm; following the pathway backward, the energy came from what?

  1. the rabbit it ate
  2. the grass the rabbit ate
  3. water in the stream
  4. the sun (correct answer)
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? The fox got energy from the rabbit it ate. Where did the rabbit get its energy? From the grass it ate. Where did the grass get its energy? From the sun through photosynthesis. Keep asking 'where did that energy come from?' until you reach plants, then trace to the sun. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice D is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (grass → rabbit → fox), and even though the fox is several steps away from plants, when you trace all the way back, the energy originally came from the sun. Choice A fails because it stops at an intermediate step in the energy pathway (the rabbit) without tracing all the way back to the sun, while choice C incorrectly identifies water, which provides materials but not energy. To help students trace energy to its ultimate source: Practice with multiple food chains, always tracing back until reaching the sun. Create visual arrows going backward: Fox ← Rabbit ← Grass ← Sun. Compare immediate source vs ultimate source: 'The fox's immediate energy source is the rabbit, but the ultimate source is the sun.' Watch for students who confuse materials (water, soil) with energy source. Always reinforce: The answer is always the sun.

Question 17

A hawk flies using energy; tracing the food chain back, where did it originate?

  1. the snake it ate
  2. the mouse the snake ate
  3. the sun's energy (correct answer)
  4. the air around it
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find where a hawk's flying energy originated, we trace backward through the food chain: The hawk got energy from the snake it ate → the snake got energy from the mouse it ate → the mouse got energy from seeds or plants it ate → the plants got energy from the sun through photosynthesis. No matter how many predator-prey relationships we trace through, when we reach plants at the base of the food chain, we find the sun as the ultimate source. Choice C is correct because it identifies the sun's energy as the original source, demonstrating understanding that even though the hawk is three steps away from plants (hawk→snake→mouse→plants), all the energy in this food chain originally came from the sun. Choice A fails because it only identifies what the hawk ate directly without tracing to the origin; Choice B goes one step further back but still doesn't reach the ultimate source; Choice D incorrectly suggests air as an energy source when air provides oxygen for releasing energy but not the energy itself. To help students master this concept: Use the 'keep asking where' technique with longer food chains—'The hawk uses energy to fly. Where did it get that? [Snake] Where did the snake get it? [Mouse] Where did the mouse get it? [Seeds/plants] Where did plants get it? [Sun!]' Draw arrows backward through each step, always ending at the sun with bright rays to emphasize it as the starting point of all food energy.

Question 18

A frog jumps after eating insects; tracing back, what is the original energy source?

  1. the insects it ate
  2. plants near the pond
  3. energy from the sun (correct answer)
  4. the air above water
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of the frog's jumping energy, we trace backward through the food chain. Start with the frog: Where did it get its energy? From the insects it ate. Where did the insects get their energy? From plants they ate near the pond. Where did the plants get their energy? From the sun through photosynthesis. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice C is correct because it identifies energy from the sun as the original source. This demonstrates understanding that even though energy passes through multiple organisms (plants → insects → frog), when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step (the insects) without tracing all the way back to the sun. The question asks for the ORIGINAL energy source—we must trace all the way back through the entire food chain. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with the frog jumping: 'The frog uses energy to jump. Where did that energy come from? [The insects it ate] Where did the insects get their energy? [The plants they ate] Where did the plants get their energy? [The sun!]' Emphasize: The sun is ALWAYS the ultimate source. Create visual arrows going backward: Frog ← Insects ← Plants ← Sun. Watch for students who stop tracing too early, and always reinforce: Trace all the way back.

Question 19

A deer uses energy to grow; tracing back, what is the ultimate source of its energy?

  1. plants it ate
  2. the sun (correct answer)
  3. the soil
  4. the deer's body
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the original source of an animal's energy, we trace backward through the food chain. Start with the animal: Where did it get its energy? The deer got energy from the plants it ate. Where did the plants get their energy? From the sun through photosynthesis. Even though this is a shorter food chain than some examples, we still must trace all the way back to the ultimate source. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy. Choice B is correct because it identifies the sun as the original and ultimate source of energy. This demonstrates understanding that even though the deer directly ate plants, when you trace the energy pathway back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step in the energy pathway (the plants) without tracing all the way back to the sun. The question asks for the ULTIMATE source—we must trace all the way back until we reach the sun. To help students trace energy to its ultimate source: Use the 'keep asking where' technique even with shorter chains: 'The deer uses energy to grow. Where did that energy come from? [Plants it ate] Where did the plants get their energy? [The sun!]' Emphasize that even when an animal eats plants directly, the sun is still the ultimate source. Draw sunbeams at the start of every food chain. Watch for students who stop at the plant level instead of tracing to the sun.

Question 20

A fox uses energy to stay warm; tracing back, what is the ultimate source?

  1. the rabbit it ate
  2. plants in the meadow
  3. air in the forest
  4. light from the sun (correct answer)
Explanation: This question tests the ability to connect energy use in animals back to the original source—the sun (NGSS 5-PS3-1). Students must trace energy through complete pathways and recognize that the sun is the ultimate source of energy for almost all life on Earth. To find the ultimate source of a fox's energy for staying warm, we trace backward through the food chain. Start with the fox: Where did it get its energy? From the rabbit it ate. Where did the rabbit get its energy? From the plants it ate in the meadow. Where did the plants get their energy? From the sun through photosynthesis. The sun is the ultimate source because only plants can capture the sun's light energy and transform it into food energy that can flow through food chains. Choice D is correct because it identifies light from the sun as the ultimate source of energy. This demonstrates understanding that even though energy passes through multiple organisms (plants → rabbit → fox), when you trace all the way back, the energy originally came from the sun, which plants captured through photosynthesis. Choice A fails because it stops at an intermediate step (the rabbit) without tracing all the way back to the sun. Choice C fails because air provides oxygen for respiration but not the energy itself—the question asks for the ultimate energy source. To help students trace energy to its ultimate source: Teach the 'keep asking where' technique. Start with the fox staying warm: 'The fox uses energy to stay warm. Where did that energy come from? [The rabbit it ate] Where did the rabbit get its energy? [The plants it ate] Where did the plants get their energy? [The sun!]' Practice with multiple food chains, always tracing back until reaching the sun. Create visual arrows going backward: Fox ← Rabbit ← Plants ← Sun. Always reinforce: Trace all the way back. The answer is always the sun.