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Impact on Climate
Scientists believe carbon
dioxide, CO2, is responsible for
global warming.
Events, such as volcanic eruptions and
clear cutting of trees in the rainforest,
can have global effects on weather
patterns and climate throughout the
world.
Scientists theorize that global warming
would cause higher ocean levels and
global freezing would cause lower ocean
levels.
The Milankovitch Theory is
one of the major theories that
explain how an ice age on
Earth could have occurred.
The Milankovitch Theory suggests that the earth
wobbles slightly as it orbits around the Sun and
causes a varied difference in the distance the earth is
from the sun. The change in distance causes more or
less radiation/heat during different periods of time.
According to the Milankovitch, lower
temperatures occur when the earth is farther
away from the sun. These lower
temperatures caused an ice age.
Scientists theorize that large
volcanic activity can create
dust clouds that block the sun
and create cooler temperatures
on Earth.
The Greenhouse Effect is the
natural heating of a planet
where gases in the atmosphere
of a planet trap thermal energy
(heat).
Scientist theorize that pollution by
humans has increased the Greenhouse
Effect on Earth causing Global Warming.
List possible reasons why the
Earth has experienced ice ages
in the past.
asteroids
volcanoes
solar flares
Milankovitch Theory
The ozone layer shields the earth
from the sun’s harmful radiation.
The chemical composition of
ozone is three atoms of oxygen
and written as O3.
There is a hole in the ozone
layer over the South Pole.
The release of
Chlorofluorocarbons (CFC)
into the atmosphere has
caused the hole in the ozone
layer to form.
Chlorofluorocarbons
(CFC) have been
used in aerosol
sprays, refrigeration,
air conditioners,
foams, cleaning
solvents, and
electrical
components.
Because of the damage to the
ozone layer, Aerosol sprays are
now banned in the United
States and Europe.