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Geothermal Energy
Beginning of essay
By Sean Griffiths
Physics 200
The human population is currently using up its fossil fuel supplies at staggering rates. Before long we will be forced to turn somewhere else for energy. There are many possibilities such as hydroelectric energy, nuclear energy, wind energy, solar energy and to name a ....
Middle of essay
....nd granite. The early crust was very thin because the core was extremely hot. It is estimated that the mantel e 200 to 300 degrees Celsius warmer than it is today. As the core cooled through volcanism the crust became thicker and cooler. The earth is made up of four basic layers, the inner solid core, the outer liquid core, the mantel and the lithosphere and crust. The density of the layers gets greater the closer to the center of the earth that one gets. The inner core is approximately 16% of .... |
| Number of words: 4686 |
Approximate pages: 18 |
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