Ozone (O3) Is A Molecule Consisting Of Three Oxygen Atoms, Similar To The Oxygen

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Term Paper Title	Ozone (O3) Is A Molecule Consisting Of Three Oxygen Atoms, Similar To The Oxygen
# of Words	3684
# of Pages (250 words per page double spaced)	14.74

Ozone

Ozone

Ozone (O3) is a molecule consisting of three oxygen atoms, similar to the oxygen
we breathe (O2), however oxygen consists of only two oxygen atoms.  In the
stratosphere, a region high up in the upper atmosphere, light rays are
responsible for the breaking down of oxygen (O2), breathable oxygen into its two
separate oxygen atoms.  Lone oxygen atoms are markedly reactive.  When a lone
oxygen atom comes into contact with a breathable oxygen molecule (O2) it
combines to form ozone (O3).  The ozone layer is a small residual amount of
ozone concentrated in a band in the upper atmosphere.  This band of concentrated
ozone resides approximately between twenty and forty kilometers high in the
stratosphere.  The ozone layer reactions that both create and destroy ozone has
come into a dynamic equilibrium.  This dynamic equilibrium is very delicate and
resulted during atmospheric formation (Environment Canada, 1996). Ozone, however,
is very rare even in the ozone layer.  Oxygen makes up approximately twenty
percent of air and ozone makes up only 3 x 10-5 percent of air.  Furthermore,
this minuscule amount of ozone is enough to protect the earth from most
ultraviolet light.  Ozone prevents most UV-B radiation from reaching the surface
of the earth (Environment Canada, 1996). Ozone is very important to life on
earth because the harmfulness of high-energy UV-B radiation stems from the high
energy of these light rays, enabling them to penetrate deeply into water, plant
tissue and epidermal tissue of animals.  Increased UV-B radiation results in
harming the metabolic system of cells and ultimately damage to genetic material
present in effected cells.  Living organisms on the surface of the earth have
always been exposed to some, and only slightly differing levels of UV-B
radiation depending of geographic location and season.  Through evolution,
cellular repair mechanisms have evolved to safeguard cells against damage done
by UV-B radiation.  With the increase in the UV-B radiation, more damage is done
to cellular functions then the natural protection system can deal with
(Environment Canada, 1996).  Life on earth would more or less be void if not for
the formation of the ozone layer during atmospheric formation (Porter, 1996).
With out the ozone layer the harmful UV-B radiation would not allow the growth
of autotrophic plants, resulting in reduction in oxygen production; ultimately
the destruction of most living organisms on the earth surface would result.
Inc...

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