What are the different forms in which water can exists on Earth?
What are the different types of gases present in air and what is the percentage of the different gases which are present?
From where do the following usually get water? In which form is water present in them?
(a) Clouds
(b) Plants
(c) Mountain tops
(d) Aquifer (5)
(e) Animals
What is present in the sweat which forms white patches?