SOCIAL S. UNIT 4

Complete the sentence.

Aproximately .....of the surface of the Earth is covered in water.

• 60%

• 70%

• 80%

• 90%

The immense majority of the water is in the.....

• lakes

• rivers

• oceans and seas

• glaciers

The oceans and seas are....

• small areas of fresh water

• small areas of salt water

• enormous areas of fresh water

• enormous areas of salt water

A river is a flowing ......of fresh water.

• path

• stream

• lake

• sea

Lakes are surrounded by....

• water

• land

• air

• seas

Glaciers are very ......masses of ice

• thin

• thick

• small

• important

About......of the fresh water on our planet is found underground.

• 50%

• 20%

• 30%

• 90%

We can find the source of a river in the....

• upper course

• middle course

• lower course

• river

If you are watching a waterfall, you are in the....

• middle course

• upper course

• lower course

• lake

You can find meanders in the....

• lake

• lower course

• middle course

• upper course