Food Websand Food Chains Worksheet-KEY-11dbru5 - Food Webs and ... - Free Printable

Let’s go step by step through the worksheet to make sure we understand and answer everything correctly.

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Part 1: Look at this food chain.

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

This means:
- Lettuce is eaten by greenfly
- Greenfly is eaten by ladybug
- Ladybug is eaten by thrush
- Thrush is eaten by cat

Now let’s answer each question:

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

In any food chain, the arrow shows the direction that energy flows — from the thing being eaten to the thing that eats it. So if A → B, then B gets energy by eating A.

✔ Answer: FLOW OF ENERGY FROM FOOD TO EATER

b) Name the producer in the food chain

Producers are living things that make their own food (usually plants using sunlight). In this chain, lettuce is the only plant — so it’s the producer.

✔ Answer: LETTUCE

c) Name the third trophic level in the food chain

Trophic levels count how many steps up you are from the producer:

- Level 1: Producer → lettuce
- Level 2: Primary consumer → greenfly (eats lettuce)
- Level 3: Secondary consumer → ladybug (eats greenfly)
- Level 4: Tertiary consumer → thrush (eats ladybug)
- Level 5: Quaternary consumer → cat (eats thrush)

So the third trophic level is the ladybug.

✔ Answer: LADYBUG

d) Name the tertiary consumer in the food chain

As above:

- Primary consumer = greenfly (level 2)
- Secondary consumer = ladybug (level 3)
- Tertiary consumer = thrush (level 4) ← this is what we want
- Cat is quaternary (level 5)

✔ Answer: THRUSH

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Part 2: Look at these food chains.

We’re given four food chains:

1. grass → slug → thrush → cat
2. grass → slug → fox
3. grass → rabbit → fox
4. grass → rabbit → cat

And we have a food web diagram with arrows already drawn for some connections. We need to fill in the rest based on the food chains.

But since the user didn’t ask us to draw, and part (a) says “One has been added for you,” we’ll skip drawing and move to the questions that use the completed food web.

b) Name the producer in this food web.

All food chains start with grass — so grass is the only producer here.

✔ Answer: GRASS

c) Name a consumer in this food web.

Consumers are animals that eat other organisms. From the food chains, we see:

- Slug eats grass → consumer
- Rabbit eats grass → consumer
- Thrush eats slug → consumer
- Fox eats slug and rabbit → consumer
- Cat eats thrush and rabbit → consumer

So any of these would work. The answer lists all of them.

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

d) What eats rabbits?

Look at the food chains:

- Chain 3: grass → rabbit → fox → so fox eats rabbit
- Chain 4: grass → rabbit → cat → so cat eats rabbit

Also, in the food web diagram (even though we don’t redraw), arrows point from rabbit to fox and rabbit to cat.

✔ Answer: FOX AND A CAT

e) What does a fox eat?

From the food chains:

- Chain 2: grass → slug → fox → so fox eats slug
- Chain 3: grass → rabbit → fox → so fox eats rabbit

No other chains show fox eating anything else.

✔ Answer: RABBITS AND SLUGS

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Final Answer:

Part 1:
a) FLOW OF ENERGY FROM FOOD TO EATER
b) LETTUCE
c) LADYBUG
d) THRUSH

Part 2:
b) GRASS
c) SLUG, RABBIT, THRUSH, CAT, FOX
d) FOX AND A CAT
e) RABBITS AND SLUGS