A town’s water supply is obtained by purifying river water.

a. What are the A and B in the diagram of the water cycle below?

b. (i) Filtration or distillation – which of these processes would produce the purest water from river water? Give a reason for your answer.

(ii) Filtration or distillation – which of these processes is used in this country for producing drinking water from river water?

c. In recent years pollution of rivers and lakes has become a serious problem. State two main sources of river pollution.

d. In some areas water is ‘recycled’. What does recycling mean and why is it necessary?

Transcribed Image Text:

rain A evaporation rivers lakes and seas B,