Ecosystems Worksheets - Free Printable

Let’s go step by step to answer the questions on the “What Is a Food Web?” worksheet.

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Question 1: How is a food web different from a food chain?

A food chain shows just ONE path of energy — like grass → rabbit → fox.
But in nature, animals eat more than one thing, and many animals eat the same thing. So a food web connects MANY food chains together. It shows how everything is linked in an ecosystem.

✔ Final Answer for Q1: A food web is made up of many overlapping food chains, showing how energy flows through multiple paths in an ecosystem. A food chain only shows one single path.

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Question 2: In a food web, the arrows point to the organisms __________ (giving/receiving) the energy.

Think about it: If a rabbit eats grass, the arrow goes from grass → rabbit. That means the rabbit is GETTING the energy from the grass.

So arrows always point TO the organism that is RECEIVING the energy.

✔ Final Answer for Q2: receiving

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Question 3: Where do all food webs first get their energy? Circle the correct answer.

Look at the options:
- a decomposer
- a consumer
- the sun
- a producer

Producers (like plants) make their own food using sunlight. But where does THAT energy come from? The SUN! All energy in food webs starts with the sun. Plants capture it, then pass it along.

✔ Final Answer for Q3: the sun

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Question 4: Look at the food web to the left. Imagine that all of the grasshoppers die. What effect(s) might that have?

In the food web shown (even though we can’t see the full image, based on standard food webs), grasshoppers are usually eaten by frogs, birds, or small mammals. If grasshoppers disappear:

→ Animals that eat them will have less food. They might starve or move away.
→ Plants that grasshoppers ate might grow too much (since nothing’s eating them).
→ This could throw off the whole balance of the ecosystem.

✔ Final Answer for Q4: If all the grasshoppers died, the animals that eat them (like frogs or birds) would lose a food source and might struggle to survive. Also, plants that grasshoppers normally eat might overgrow.

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Final Answer:
1. A food web is made up of many overlapping food chains, showing how energy flows through multiple paths in an ecosystem. A food chain only shows one single path.
2. receiving
3. the sun
4. If all the grasshoppers died, the animals that eat them (like frogs or birds) would lose a food source and might struggle to survive. Also, plants that grasshoppers normally eat might overgrow.