Chapter-4 AIR

1. What is the atmosphere?

Explanation:

The term "atmosphere" refers to the cloud of air that envelops the planet. The majority of the atmosphere is made up of nitrogen and oxygen, with smaller amounts of other gases like carbon dioxide, helium, ozone, etc. The environment on earth is essential to the existence of every living thing.


2.Which two gases make the bulk of the atmosphere?

Explanation:

The atmosphere is primarily composed of two gases:

  1. Ozone (21%).

  2. (nitrogen 78%)


3. What is weather?

Explanation:

Weather refers to the atmosphere's state from hour to hour or day to day. From day to day, the weather can vary dramatically. You can categorize it as hot, dry, chilly, or wet.


4. What is air pressure?

Explanation:

Air pressure is the power that the weight of the air applies to the planet's surface. At sea level, air pressure is greatest; as altitude increases, air pressure drops.


5. Name three types of rainfall.

Explanation:

  1. Convectional precipitation

  2. Rain orographically

  3. cyclonic downpour


6. Wet clothes take longer time to dry on a humid day?

Explanation:

Because there is more water in the air on a humid day than on a sunny day, wet garments take longer to dry on a humid day. As a result, the rate of perspiration slows down and the air absorbs less water from the clothing.