Food chains

1

What is a trophic level?

2

Which is the producer in this food chain? grass → cow → human

3

What is a primary consumer?

4

Which is the tertiary consumer in this food chain? tree → caterpillar → shrew → owl

5

What resource do plants not compete for?

6

About what percentage of energy is transferred from one trophic level to the next?

7

Which of the following is a reason why not all the energy at one trophic level is passed to the next level?

8

In a certain food chain, 45 kJ of energy is passed to the secondary consumers and 305 kJ is lost by the primary consumers. What percentage is transferred to the secondary consumers?

9

Which of the following would help farmers increase the efficiency of food production?

10

What is transferred along a food chain?