100+ Physics Important Question for Air Force - 3

Question: 11

What is atmosphere?

The envelop of air surrounding the earth is called atmosphere.

Question: 12

What are the two types of nitrogen fixation?

The two types of nitrogen fixation are

(1) Biological fixation of nitrogen

(2) Non biological fixation of nitrogen.

Question: 13

Write a note on stratosphere?

The stratosphere is the second layer of air in the atmosphere. It lies between 10 to 50 km above the earth’s surface.

Question: 14

How is oxygen important?

Oxygen is essential for living beings to breathe in. it is necessary for burning things to burn.

Question: 15

What is superficial expansion?

The increase in area is known as superficial expansion.