Unit 3 : People and the environment

The first human appeared in ------------- continent.

• Asia

• Africa

• Australia

• Anatartica

Who can travel all over the world and space today?

Today there are more than ----------------- people and the number is still growing.

• Seven million

• Seven billion

• Seven trillion

In the early days, few people have --------- area of space that they made little difference to their environment.

• Large

• Small

Some kinds of animals and plants in the world have died out is called e-----------.

• extinct

• endangered

Many other kinds of plants and animals are rare and only a few are left which they could die in the future is called e----------.

• extinct

• endangered

The tiger is endangered because of ----------- and beings destroyed the forests where tiger live.

Valuable soil has been destroyed in Russia which is called q------ .

People dig for building stone, ------------- and some fuels.

Plants and animals have been poisoned by waste ----------- from farms and factories