Exercise4. Complete these word-building tables. If necessary, use a dictionary to help you.

Exercise5. Complete the definitions:

a. Conservation is the protection of natural things, e.g. …… and… .

b. Acid rain is rain that contains dangerous chemicals. It is caused by … … .

c. The ozone layer is a layer of gases that stop dangerous radiation from the sun reaching … …. .

d. Global warming is an increase in world temperature caused by an increase in ……. .

Exercise6. Fact finding
Choose a number from the box to complete these sentences about natural disasters.

500 26.5 10 1500

1) There are over _____ active volcanoes around the world.
2) Tsunamis can travel at up to _____ miles per hour.
3) Hurricanes only form when water temperature reaches _____ ºC.
4) ____ % of the world’s population live within danger range of volcanoes.

Exercise7. Recycling race
Work in teams and think of things to put in the recycling columns. The words must all begin with the letter you’re given in the first column.

	Paper/ Wood	Plastic	Metal	Glass	Organic
B	Book	Bin	Bicycle	Bulb	Banana
D
C
F
G
N
M
S
T

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