What are the different methods of water conservation?

Give reasons for the following:

Our feet become wet while walking on grass in cold winter mornings.

Give reasons for the following:

Rain maintains the supply of water on land.

In which of the following will the rate of evaporation be higher?

(a) water in a plate kept in sunlight.

(b) water in a plate kept in shade.

Give reason for the same.

Across ($\to$):

1. It covers two-thirds of the earth's surface.                                            

2. The gaseous state of water.

3. A water-borne disease.

Down ($\downarrow$):

1. Level of groundwater.

4. Solid-state of water