1

Unit 3 – Life on Earth

2

1 – Biodiversity and the

distribution of life

3

4

5

6

2 – Energy in ecosystems

7

8

9

10

11

12

13

14

15

3 – Sampling techniques and

measurement of abiotic and biotic

factors

16

4 – Adaption, natural selection

and the evolution of species

17

18

5 – Human impact on the

environment