5. But first, let us discuss
the 5 Layers of the
Atmosphere!
6. Troposphere
-temperature decreases as height
increases
-almost all weather occurs within
this layer.
-goes up to a height of 7 to 20 km
above sea level
10. Ozone (unusual type of oxygen molecule)
-relatively abundant in the stratosphere
-heats this layer as it absorbs energy from
incoming ultraviolet radiation from the Sun.
13. As you get higher up in the mesosphere,
the temperature gets colder. The top of
the mesosphere is the coldest part of
Earth's atmosphere. The temperature
there is around -90° C (-130° F)!
15. Temperatures climb sharply in the lower
thermosphere (below 200 to 300 km
altitude), then level off and hold fairly
steady with increasing altitude above that
height.
28. Ozone Depletion
When CFCs and HCFCs reach the
stratosphere, the ultraviolet radiation from
the sun causes them to break apart and
release chlorine atoms which react
with ozone, starting chemical cycles
of ozone destruction
that deplete the ozone layer.
29. One chlorine atom can break
apart more than
100,000 ozone molecules.
30. a gradual increase in the overall
temperature of the earth's atmosphere
generally attributed to the greenhouse
effect caused by increased levels of
carbon dioxide, chlorofluorocarbons,
and other pollutants.
Global Warming