The document summarizes the four main layers of Earth's atmosphere - the troposphere, stratosphere, mesosphere, and thermosphere. The troposphere extends to about 11 km above Earth and contains around 75% of the atmosphere. The stratosphere extends from the troposphere to around 50 km and contains the ozone layer. The mesosphere is the coldest layer, extending from the stratosphere to 80 km. The outermost thermosphere extends from the mesosphere to around 1000 km and is the hottest layer of the atmosphere.

1. ATMOSPHERE
SOURABH DAS
Manager, TATA STEEL

3. Composition of the Air
Which Gas Do
We Breathe
In ?

5. The Troposphere
The bottom layer of the
Atmosphere
Stretches to about 11 km
Temperature decreases with
altitude
Weather condition happens
here
Contains about 75% of the
Air
Mostly contain Nitrogen
and Oxygen

6. The Stratosphere
The Second layer of the
atmosphere
Stretches to about 50 Kms
Contains The Ozone layer
Most planes travel through
this layer
Contains about 24% of the
air
Without the Stratosphere’s
Ozone Layer, harmful UV
radiation from the Sun
would reach Earth

7. The Mesosphere
The Third layer of the
atmosphere
Stretches to about 80 Kms
Coldest layer of
Atmosphere
Temperature is as low as
– 100 degree C
Most meteors burn up in
this layer

8. The Thermosphere
The Fourth (outer most)
layer of the atmosphere
Stretches to about 1000
Kms
 Hottest layer of
Atmosphere
Temperature is very high.
Ranges from 500 to 2000
degree C
Satellites rotates in this
layer
Outer most part of
Thermosphere is Exosphere

10. THANK YOU