1. GREEN HOUSE EFFECTS

2. What is green house effects ?
rise in earth’s temperature.
By certain atmospheric gases.
That trap the sun’s energy .

3. Examples of trapping gases
Water vapour (H2O)
Carbon dioxide(CO2)
Nitrous oxide (N2O)
Methane (CH4)

4. Why are gases important ?
Heat would escape back into space
Earth’s temperature would be 60 F
Colder
Makes earth suitable life

5. Traps heat from sun
Glass lets in light
Glass keeps heat from escaping
Causes greenhouse to heat up

6. PROCESS OF THE GREENHOUSE
EFFECT

7. Some solar radiation
Is reflected by the earth
And the atmosphere .
Some solar
Radiation passes
Through the clear
Atmosphere.
Most radiation is absorbed by
The earth surface
And warms it.
Some of the infrared radiation passes
Through the atmosphere and some is
Absorbed and re-emitted in all direction
By green house gas molecules. The
Effect of this is to warm the earth’s
Surface and the lower atmosphere .

8. SUN’S energy passes through atmosphere
26% is reflected or scattered
19 % absorbed by clouds , gases and particles
4% reflected to space by sun
51% reaches the surface

9. Possible causes of the green house effect
Deforestation
Burning of fossils fuels
Burning of wood and coal
Population growth

10. The end Thank you
Group number 5