Food Webs and Ecosystems (Grade 7)
Free printable Grade 7 science worksheet on Australian bushland food webs. Students trace energy through producers and consumers and predict what happens when a population changes.
Grade 7 · Science worksheet
Name
Date
Science
Food Webs and Ecosystems
The table shows what each organism in a patch of Australian bushland eats. Use it to answer the questions. An arrow in a food web always points from the organism that is eaten to the organism that eats it.
| Organism | What it eats in this web |
|---|---|
| Grass | nothing (it makes its own food) |
| Eastern grey kangaroo | Grass |
| Bush rat | Grass, Leaf-eating insects |
| Eucalyptus leaves | nothing (it makes its own food) |
| Koala | Eucalyptus leaves |
| Leaf-eating insects | Eucalyptus leaves |
| Superb fairy-wren | Leaf-eating insects |
| Carpet python | Bush rat, Superb fairy-wren |
| Wedge-tailed eagle | Bush rat, Eastern grey kangaroo |
- 1.How many producers are in this food web?
- 2.Which organism eats both grass and leaf-eating insects?
- 3.How many predators does the bush rat have in this web, and what are they?
- 4.Write a food chain of four organisms that starts with eucalyptus leaves.
- 5.If a disease killed all the leaf-eating insects, which animal in this web would lose its only food source?
- 6.Which consumers in this web are not eaten by anything else shown?
- 7.How many different food sources does the carpet python have in this web?
- 8.What does the direction of an arrow in a food web show?
- 9.Grass and eucalyptus leaves make their own food using light. What are organisms like this called?
- 10.A koala eats only eucalyptus leaves. Is it a herbivore, a carnivore or an omnivore?
- a) herbivore
- b) carnivore
- c) omnivore
- 11.If kangaroo numbers fell sharply, what would most likely happen to the amount of grass?
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