Food Web vs. Food Chain Worksheet: Understanding Ecosystem Relationships

Let’s go step by step to solve each question based on the food web diagram.

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Question 1: State the main difference between a food chain and a food web.

A food chain is a single, straight line showing who eats whom — like Grass → Grasshopper → Bird → Fox. It shows one path of energy flow.

A food web is made up of many connected food chains. It shows how different animals are linked through multiple eating relationships — more realistic because most animals eat more than one thing.

✔ So, the main difference:
→ A food chain is one simple path.
→ A food web is many interconnected paths (a network).

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Question 2: In the food chain: Grasses ➤ Grasshoppers ➤ Birds ➤ Foxes

We need to label each level:

a) Producer: The organism that makes its own food (usually plants). Here, it’s Grasses.

b) Primary consumer: Eats the producer. That’s Grasshoppers (they eat grasses).

c) Secondary consumer: Eats the primary consumer. That’s Birds (they eat grasshoppers).

d) Tertiary consumer: Eats the secondary consumer. That’s Foxes (they eat birds).

✔ Answers:
a) Grasses
b) Grasshoppers
c) Birds
d) Foxes

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Question 3: Name an apex predator in the food chain.

An apex predator is at the top of the food chain — no other animal eats it.

Looking at the given chain: Grasses → Grasshoppers → Birds → Foxes
→ Foxes are not eaten by anything else in this chain → so Foxes are the apex predator here.

Also, from the full food web, Owls also don’t have any arrows pointing away from them being eaten — so they’re also apex predators. But since the question says “in the food chain” (the one listed), we stick with Foxes.

✔ Answer: Foxes

*(Note: If the question meant “in the food web”, then both Foxes and Owls would be correct. But it specifically refers to the chain given in Q2.)*

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Question 4: Name three herbivores in the food web.

Herbivores = animals that eat only plants (producers).

From the diagram:

- Rabbits → eat Carrots and Grasses → herbivore
- Mice → eat Grains and Grasses → herbivore
- Grasshoppers → eat Grasses and Grains → herbivore

✔ Three herbivores: Rabbits, Mice, Grasshoppers

*(Carrots, Grasses, Grains are producers — not animals. Birds, Foxes, Owls are carnivores or omnivores.)*

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Question 5: Name three carnivores in the food web.

Carnivores = animals that eat other animals.

From the diagram:

- Foxes → eat Rabbits, Birds → carnivore
- Owls → eat Mice, Grasshoppers → carnivore
- Birds → eat Grasshoppers → carnivore (even though some birds eat seeds too, in this web, Birds are shown eating only Grasshoppers → so we can count them as carnivores here)

Wait — let’s check carefully:

In the food web:

- Foxes → eat Rabbits and Birds → definitely carnivore
- Owls → eat Mice and Grasshoppers → carnivore
- Birds → eat Grasshoppers → yes, that’s meat → so carnivore
- Also, note: Mice? They eat grains/grasses → herbivore. Rabbits? Herbivore. Grasshoppers? Herbivore.

So three clear carnivores: Foxes, Owls, Birds

✔ Answer: Foxes, Owls, Birds

*(Some might argue Birds are omnivores if they ate seeds too — but in this diagram, Birds only have an arrow from Grasshoppers → so for this task, they’re acting as carnivores.)*

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Final Answer:

1. A food chain is a single linear path of who eats whom, while a food web is a complex network of many interconnected food chains showing multiple feeding relationships.

2.
a) Grasses
b) Grasshoppers
c) Birds
d) Foxes

3. Foxes

4. Rabbits, Mice, Grasshoppers

5. Foxes, Owls, Birds