GREEN HOUSE EFFECTS

What is green house effects ?

rise in earth’s temperature.

By certain atmospheric gases.

That trap the sun’s energy .

Examples of trapping gases

Water vapour (H2O)

Carbon dioxide(CO2)

Nitrous oxide (N2O)

Methane (CH4)

Why are gases important ?

Heat would escape back into space

Earth’s temperature would be 60 F Colder

Makes earth suitable life

Traps heat from sun

Glass lets in light

Glass keeps heat from escaping

Causes greenhouse to heat up

PROCESS OF THE GREENHOUSEEFFECT

Some solar radiation Is reflected by the earth And the atmosphere .

Most radiation is absorbed by The earth surface And warms it.

Some solarRadiation passes Through the clear Atmosphere.

Some of the infrared radiation passes Through the atmosphere and some is Absorbed and re-emitted in all directionBy green house gas molecules. The Effect of this is to warm the earth’s Surface and the lower atmosphere .

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

Possible causes of the green house effect

Deforestation

Burning of fossils fuels

Burning of wood and coal

Population growth

The end Thank you

Group number 5