POWERPOINT PRESENTATION

1. GYANDEEP COLLEGE OF EDUCATION
JANJGIR
TOPIC – EARTH’S ATMOSPHERE
SUBMITTED BY – SUMAN KANWAR
CLASS – B.ED 2ND YEAR

2. SYNOPSIS :-
• INTRODUCTION
• MEANING
• EARTH’S ATMOSPHERE
• LAYERS OF ATMOSPHERE
 TROPOSPHERE
 STRATOSPHERE
 MESOPHERE
 THERMOSPHERE
 EXOSPHERE

3. INTRODUCTION
The surface of the earth is a complex zone in which three main components of the environment
meet, overlap and interact. The solid portion of the earth on which we live is called the
Lithosphere. The gaseous layers that sourranded the earth is called Atmosphere. Water covers a
very big area of the earth’s surface and this area is called the Hydrosphere. The narrow zone where
we found land, water, and air together, which contains all forms of life, is called Biosphere.

4. MEANING
The earth is surrounded by a layer of gas called the atmosphere. The earth is surrounded by blanket of
air, which we call the atmosphere it reaches over 560 kilometers from the surface of the earth.
The atmosphere is divided into five layers based on composition, temperature and other properties. These
layers starting from earth’s surface are called the troposphere, the stratosphere, the mesosphere, the the
mesosphere, the thermosphere and the exosphere.
ATOMSPHERE :-
• Absorbs the energy from the sun
• Recycles water and other chemicals
• Protects us from high-energy radiation and the frigid vacuum of space.
• The atmosphere protects and supports life.

5. EARTH’S ATMOSPHERE
Earth’s atmosphere is made of a mixture of gases called air
 Nitrogen gas makes up about 78% of earth’s atmosphere.
The second most abundant gas is Oxygen,
which makes up 21% of earth’s atmosphere.
The third Argon (Ar, 0.9%).
 Carbon Dioxide (CO2, 0.03%)

7. TROPOSPHERE
• It is the lowest layer of earth's atmosphere.
• Contains approximately 80% of the total mass of the
atmosphere.
• It is where weather occurs.
• Its average height is 13 km.
• The air we breathe exists here.
• Almost all the weather phenomena like rainfall,
fog and hailstorm occur in this layer.

8. STRATOSPHERE
• It is the second layer of the atmosphere found above the troposphere.
• It contains the ozone layer.
• It extends up to a height of 50 km.
• This layer is almost free from clouds and associated
weather phenomenon, making conditions most ideal
for flying aeroplanes.

9. MESOSPHERE
• This is the third layer of the atmosphere.
• It lies above the stratosphere.
• It extends up to the height of 80 km.
• Meteorites burn up in this layer on entering
from the space.

10. THERMOSPHERE
• This layer is found above mesopause from 80 to 400 km.
• It is the layer where the auroras occur.
• In thermosphere temperature rises very rapidly with
increasing height.
• Ionosphere is a part of this layer.
• This layer helps in radio transmission.
• Radio waves transmitted from the earth are reflected back
to the earth by this layer

11. EXOSPHERE
• It is the out most layer of atmosphere and merges with space.
• This layer has very thin air.
• Light gases like helium and hydrogen float into the space from here.