Educational worksheet teaching children about food chains and energy flow in ecosystems.

Let's solve this Food Chains worksheet step by step.

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🔍 Understanding the Concept

A food chain shows how energy flows from one organism to another. Energy starts with producers (like plants), which make their own food using sunlight. Then, consumers (animals) eat the producers or other consumers.

The correct flow of energy is:
> Producer → Primary Consumer → Secondary Consumer

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Now let’s analyze each option:

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✔ Option 1:

Grass → Grasshopper → Frog

- Grass = Producer (makes its own food)
- Grasshopper = Primary consumer (eats grass)
- Frog = Secondary consumer (eats grasshopper)

✔ This is a correct food chain.

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✘ Option 2:

Fish → Seaweed → Shark

- Seaweed = Producer
- Fish eats seaweed? Possibly, but here it's shown as fish → seaweed, meaning fish eats seaweed — that could be okay.
- But then seaweed → shark? No! Sharks don’t eat seaweed directly. Also, the order is wrong.

Wait — the arrow goes:
👉 Fish → Seaweed → Shark

That means:
- Fish eats seaweed → possible (some fish do)
- But then seaweed eats shark? That makes no sense.

✘ Incorrect — energy flow is backwards. Seaweed can't eat a shark. The sequence is illogical.

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✘ Option 3:

Bird → Mouse → Owl

- Bird → Mouse? Birds don’t eat mice; actually, owls eat mice, not the other way around.
- Here, bird eats mouse? No — mice are prey, birds are predators in this context.
- But the arrow says: Bird → Mouse → Owl
- So, bird eats mouse → impossible (mice aren't eaten by most birds like this), and also owls don’t eat birds in this chain?

Wait — even if we ignore that, bird → mouse implies the bird eats the mouse, which is not typical for small birds. More importantly, the direction is backward: the mouse should be eaten by the owl, not the bird.

But the chain is:
👉 Bird → Mouse → Owl

This suggests:
- Bird eats mouse
- Mouse eats owl → NO!

✘ Incorrect — both directions are wrong. Mice don’t eat owls. And birds usually don’t eat mice unless it's a large bird of prey.

Also, mouse → owl is correct (owl eats mouse), but bird → mouse is wrong.

So overall, this chain is invalid.

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✘ Option 4:

Acorns → Squirrel → Hawk

- Acorns = Plant part (producer)
- Squirrel = Eats acorns → primary consumer
- Hawk = Eats squirrel → secondary consumer

✔ This is correct! The energy flows properly:
> Acorns → Squirrel → Hawk

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✔ Final Answer:

Check the boxes for:
- ✔ Grass → Grasshopper → Frog
- ✔ Acorns → Squirrel → Hawk

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🟩 Correct Choices:

- First option (grass → grasshopper → frog)
- Fourth option (acorns → squirrel → hawk)

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✔ Final Answer:

✔️ Check the first and fourth boxes.

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