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.

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.

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.

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.

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.

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.

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.

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.

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.

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.