DEFENCE CT 5: World Geography (Atmosphere – Structure and Composition)

In terms of volume, the main gas of the atmosphere is-

Which layer of the atmosphere transmits radio waves?

Arrange the following atmospheric layers in the correct order from the surface of the earth :

(1) Mesosphere

(2) Troposphere

(3) Thermosphere

(4) Stratosphere

Which atmospheric layer consists of the Ozone that absorbs the harmful ultra-violet radiations?

Which of the following statement regarding Exosphere is correct?

I. This is the upper most layer of the atmosphere.

II. This layer has very thin air.

III. Light gases like Helium and Hydrogen float into the space from here.

With reference to the Troposphere, consider the following statements:

1. The troposphere is the lowest portion of Earth’s atmosphere and contains approximately 80% of the atmosphere’s mass and 99% of its water vapour and aerosols.

2. The thickness of the troposphere and consequently the atmosphere is maximum at the pole.

Which of the above statements is/are correct?

7. Which among the following is not correctly matched?

The incident solar radiation is trapped by constituents of the atmosphere and reflected partly towards the Earth as

Moisture in the air at any time, is known as __________.

Why does the color of the sky appear blue?