Food chains and food webs

1

What does a food chain always start with?

2

Which is the secondary consumer in this food chain: grass -> grasshopper -> frog -> hawk?

3

What does an omnivore eat?

4

What is wrong with this pyramid of numbers?

Food pyramid showing a large number of clover above a slightly smaller number of snails, with a smaller number of thrushes above them and an even smaller number of sparrowhawks on top

5

What can we conclude from this pyramid of numbers?

Food pyramid showing a very small number of producers at bottom, a very large number of primary consumers above this, and a medium number of secondary consumers at the top

6

What is a habitat?

7

What is likely to happen to the population of slugs if the population of thrushes decreases?

Food web: the producer is grass, which is eaten by rabbits, insects and slugs. The rabbit is eaten by the fox. The insects and slugs are both eaten by voles and thrushes.

8

What is likely to happen to the population of thrushes if the population of voles increases?

Food web: the producer is grass, which is eaten by rabbits, insects and slugs. The rabbit is eaten by the fox. The insects and slugs are both eaten by voles and thrushes.

9

What is likely to happen to the population of foxes if the population of rabbits decreases?

Food web: the producer is grass, which is eaten by rabbits, insects and slugs. The rabbit is eaten by the fox. The insects and slugs are both eaten by voles and thrushes.

10

What do the arrows in a food chain show?