FoodWebsandFoodChainsWorksheet KEY 11dbru5 | Download Free PDF ... - Free Printable

Let’s go step by step through each question.

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Question 1: Look at this food chain.

The food chain is:
lettuce → greenfly → ladybug → thrush → cat

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a) What does the arrow mean in a food chain?

In any food chain, the arrow points from what is eaten to what eats it. That means energy flows from the food (the thing being eaten) to the eater (the one eating it). So the arrow shows the flow of energy.

✔ Answer: FLOW OF ENERGY FROM FOOD TO EATER

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b) Name the producer in the food chain.

Producers are living things that make their own food — usually plants. In this chain, lettuce is a plant and starts the chain. It doesn’t eat anything else; it makes its own food using sunlight.

✔ Answer: LETTUCE

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c) Name the third trophic level in the food chain.

Trophic levels are steps in the food chain:

- Level 1: Producer → lettuce
- Level 2: Primary consumer → greenfly (eats lettuce)
- Level 3: Secondary consumer → ladybug (eats greenfly)

So the third trophic level is the ladybug.

✔ Answer: LADYBUG

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d) Name the tertiary consumer in the food chain.

“Tertiary” means third-level consumer. Let’s count consumers:

- Greenfly = primary consumer (1st)
- Ladybug = secondary consumer (2nd)
- Thrush = tertiary consumer (3rd) ← eats ladybug
- Cat = quaternary consumer (4th) ← eats thrush

So the tertiary consumer is the thrush.

✔ Answer: THRUSH

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Question 2: Look at these food chains.

Given food chains:
- grass → slug → thrush → cat
- grass → slug → fox
- grass → rabbit → fox
- grass → rabbit → cat

And there’s a food web diagram with arrows already drawn for some connections.

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a) Use the food chains to help you fill in the arrows on this food web. One has been added for you.

We need to draw arrows showing who eats whom, based on the food chains.

From the chains:

- Grass is eaten by slug and rabbit → so arrows from grass → slug and grass → rabbit
- Slug is eaten by thrush and fox → arrows from slug → thrush and slug → fox
- Rabbit is eaten by fox and cat → arrows from rabbit → fox and rabbit → cat
- Thrush is eaten by cat → arrow from thrush → cat

(One arrow was already given — probably grass → slug or similar — but we don’t need to redraw, just understand.)

✔ We’ve used the chains to figure out all the correct directions.

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b) Name the producer in this food web.

Again, producers make their own food. Here, grass is the only plant — everything else eats something else.

✔ Answer: GRASS

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c) Name a consumer in this food web.

Consumers are animals that eat other organisms. All except grass are consumers.

You can name any one — like slug, rabbit, thrush, cat, or fox.

But since the answer space says “SLUG, RABBIT, THRUSH, CAT, FOX”, they want all listed? Wait — the question says “Name a consumer” — singular — but the handwritten answer lists all. Maybe it’s asking for examples? Looking at context, likely they expect you to list possible ones.

Actually, re-reading: “Name a consumer” — but in worksheets sometimes they accept multiple if space allows. Since the original answer includes all, and it’s correct, we’ll keep it.

✔ Answer: SLUG, RABBIT, THRUSH, CAT, FOX

*(Note: Any one would be fine, but listing all is also acceptable here.)*

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d) What eats rabbits?

Look at the food chains:

- grass → rabbit → fox → so fox eats rabbit
- grass → rabbit → cat → so cat eats rabbit

Also in the food web, arrows point from rabbit to fox and rabbit to cat.

✔ Answer: FOX AND A CAT

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e) What does a fox eat?

From the chains:

- grass → slug → fox → so fox eats slug
- grass → rabbit → fox → so fox eats rabbit

No other items lead to fox.

✔ Answer: RABBITS AND SLUGS

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Final Answer:

1a) FLOW OF ENERGY FROM FOOD TO EATER
1b) LETTUCE
1c) LADYBUG
1d) THRUSH
2a) [Arrows filled as per food chains: grass→slug, grass→rabbit, slug→thrush, slug→fox, rabbit→fox, rabbit→cat, thrush→cat]
2b) GRASS
2c) SLUG, RABBIT, THRUSH, CAT, FOX
2d) FOX AND A CAT
2e) RABBITS AND SLUGS