The slides contain all the points about ATMOSPHERE for school children.

1. ATMOSPHERE

2. ATMOSPHERE
The envelope of air surrounding the earth is called the
atmosphere.

3. COMPOSITION

8. Lowest and densest layer of the atmosphere.
Extends upto height 16kms =equator, 8kms = poles
All weather phenomena occur in troposphere.
Contains dust particles & water vapour.
Temp falls with increase in height.

10. 2nd layer of the atmosphere.
Average altitude= 11 to 50 kms.
Most of the ozone is contained here.
Meteors entering the earth’s atmosphere get burnt here.
Long distance aircrafts fly in lower part of this layer.

12. 3rd layer of the atmosphere.
Occurs between stratosphere and thermosphere.
Lies 50-80 Km above the Earth’s surface.
Coldest atmospheric layer.
Temp falls with elevation in this layer.
Meteors burns while entering the Earth’s atmosphere.

14. 4th layer of the atmosphere.
Lies 80-600 Km above the Earth’s surface.
Located highest above the Earth’s surface.
Hottest layer in the atmosphere.

15. Thermosphere
ExosphereIonosphere

17. Ionosphere reflects the radio signals back to the earth thus
making radio communications possible.

19.  Upper portion of the thermosphere.
 Acts as a filter to the radiations coming from the
sun.

21.  Ozone layer forms the thick layer in stratosphere.
 Protects earth from harmful radiations (Ultraviolet
Radiations).

22. OZONE LAYER DEPLETION
The minimum OZONE LAYER DEPLETION is in 2019

23. DEPLETION IN OZONE LAYER
• Chlorofluorocarbons (CFC) have caused a severe damage in
ozone layer.
• The main cause of ozone depletion and the ozone hole is
manufactured chemicals, especially manufactured halocarbon
refrigerants, solvents, propellants and foam-blowing agents
(chlorofluorocarbons (CFCs), (HCFCs), (HALONs), referred to
as ozone-depleting substances (ODS).

24. Green house effect
Natural warming process.
Carbon di-oxide and other gases are always present in the
atmosphere.
Human activities such as burning of fossil fuels and clear-cutting
of forests. , have accelerated the greenhouse effect and
caused GLOBAL WARMING

26. GLOBAL WARMING

27. Global warming is the long-term heating of
Earth's climate system, due to human activities, such as fossil
fuel burning, which increases heat-trapping greenhouse gas
levels in Earth's atmosphere.

28. WAYS TO REDUCE GLOBAL WARMING
Plant more trees.
Reduce, Reuse, Recycle.
Use Less Heat and Air Conditioning.
Change your light-bulbs.
Use Solar vehicles.
Buy Energy-Efficient Products.
Use Less Hot Water.