Question

a Explain the main features of the atmosphere.

b. What do you mean by the humidity in the atmosphere? How do we express it​

Answer 1

RELATIVE HUMIDITY:

RELATIVE HUMIDITY:Relative humidity (RH) (expressed as a percent) also measures water vapor, but RELATIVE to the temperature of the air. In other words, it is a measure of the actual amount of water vapor in the air compared to the total amount of vapor that can exist in the air at its current temperature.

Answer 2

$\huge\bf\green{Answer}$

a.】An atmosphere is the thin blanket of air that surrounds the surface of the Earth. ... The gases like Nitrogen, Oxygen, Argon, Carbon dioxide, Neon, Helium etc, contribute to the Earth's atmosphere. It is divided into 5 layers- exosphere, thermosphere,mesosphere, stratosphere and troposphere.....

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b.】Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. ... Relative humidity, expressed as a percentage, indicates a present state of absolute humidity relative to a maximum humidity given the same temperature.....