100+ UPSC Study Material Free Download Ebooks - 3

Question: 11

What is known as hail?

Falling of ice pieces along with rains is known as Hail. They may damage the roof of our houses.

Question: 12

What are the factors that determine the amount of water vapour in an air column?

The factors that determine the amount of water vapour in an air column are

(i). Its temperature and

(ii). the availability of water at that place.

Question: 13

What is convectional rainfall?

The rainfall, caused by rising air mass due to excessive heating of the Earth's surface is known as convectional rainfall.

Question: 14

How do we measure the humidity in the atmosphere?

The humidity in the atmosphere is measured in three ways.

(i). Absolute humidity

(ii). Specific humidity and

(iii). Relative humidity.

Question: 15

Where do snow fall occur?

Snow fall occurs in Simla, Kashmir and Himalayas in India. Snow fall can block roads and affect traffic flow.