Transcript userfiles/63/my files/heating of the atmosphere?

Heating of the Atmosphere
What is Thermal Energy?
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Thermal means “heat.”
Thermal energy is the heat made when
molecules move. The faster molecules
move, the higher the temperature.
Radiation
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is the transfer of energy as
electromagnetic waves
The earth receives only about twobillionths of these waves
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Conduction is the transfer of thermal
energy from one material to another by
direct contact
Thermal energy always moves from warm
to cold areas
When air molecules come into direct
contact with a warm surface, thermal
energy is transferred to the atmosphere
Convection
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Convection is the transfer of thermal
energy by the circulation or movement of
a liquid or gas
As the cool air sinks it pushes the warm
air up
The cool air is eventually heated by the
ground and again begins to rise
This continual process of warm air rising
and cool air sinking creates a circular
movement of air called a convection
current
Conduction, Convection, and
Radiation Video
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https://www.wisconline.com/learn/natural-science/earthscience/sce304/heat-transfer--conduction-convection--radiation
The Greenhouse Effect
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The green house effect is the heating of
the Earth caused by gases in the
Atmosphere trapping thermal energy.
Greenhouse Effect Video
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https://www.youtube.com/watch?v=BPJJ
M_hCFj0
Global Warming
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Gases in the atmosphere that do trap heat
energy are called greenhouse gases.
A rise in average global temperatures is
called global warming.
Keeping the Earth Livable
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Some scientists believe that global warming may
be a natural process
Even so, many countries have signed a treaty to
find ways to decrease the production
greenhouse gases
One of these ways to decrease greenhouse
gases is replanting trees when others are cut
down
Another way to reduce greenhouse gases is to
use solar and wind energy which do not produce
these gases.
https://www.youtube.com/watch?v=RMD88DNaGk