The highly salty water of an ocean is converted into pure water in nature by:

The surface of the earth covered with water is approximately?

Which of the following is a line drawn on a map that connects points of equal salinity in the ocean?

Which of the following cloud is responsible for highly intense rain?

At some places ground water is stored between layers of hard rock below the water table. This is known by which name?

Consider the following sources of world water supply and arrange them in descending order. 1. Oceans 2. Rivers 3. Polar ice and Glaciers 4. Ground water