100+ UPSC Study Material Free Download Ebooks - 2

Question: 6

Define absolute humidity?

The weight of the actual amount of water vapour present in a unit column of air is called absolute humidity. It is expressed as grams per cubic meter of air.

Question: 7

What is saturation of air?

When the air column contains water vapour up to its maximum bearing capacity the air is said to be saturated.

Question: 8

What is meant by rain shadow region?

Rainfall will be heavy on the winter ward side of the mountains. Rainfall will be light or very little, on the leeward side. Such a leeward side of a mountain range is called rain shadow region.

Question: 9

Define rainfall?

Clouds are formed due to the condensation of water vapour into water and ice particles. These particles are very small. Hence they float in the air. When condensation continues, more and more water particles are added to the cloud. They tiny water particles, join together to form bigger particles. As the size increases, the weight of the particles also increases. Thus they cannot float in the air and fall as rainfall.

Question: 10

What is condensation?

Condensation is a process by which water vapours is converted into water particles.