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Human Evolution And The Fossil Record
Beginning of Essay
Scientists continue to debate the history of man. It is generally
agreed upon by the scientific community, however, that humans evolved from
lesser beings, and this essay will function to provide evidence to support this
claim. Several points will be outlined, i .... Middle of Essay
.... constantly eats and replenishes it,
if it were to die, the ratio would change greatly after many years. It is the
difference between this ratio now and the time is died that allows a date for it
to be established. Potassium-argon dating, another dating method, is possible
due to volcanic ash and rocks found near many fossil sites. Rocks and ash
created in this manner contain potassium-40, but no argon. As time passes, the
potassium-40 decays into argon-40. In the laboratory, the sample is reheated,
and since argon-40 is a gas, it is released. The ratio of argon-40 released to
potassium-40 still present allows for a date to be assigned to obje ....
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Words: 1751 - Pages: 7
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