The process of removing salt from sea water.

• Evaporation

• Desalination

• Perspiration

Theaverage family of four uses _____________ liters of water in one year.

• 180 000

• 190 000

• 108 000

To stay healthy, we need clean and safe water.

• True

• False

Used water is called __________________.

• sewage

• freshwater

______________ is a lake build to store water.

• Reservoir

• Canal

Sewage contains lots of harmful germs and poisonous substances.

• True

• False

In a few countries, freshwater is obtained from seawater.

• True

• False

In many parts of Africa, children fetch their family's water from w________.

Water taken from a river or reservoir is __________.

• dirty

• clean

_____________is a slow moving river of ice.

• Glacier

• Polar ice caps