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Internal Sources of Energy

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by

Kaylee Bloyen

on 9 January 2014

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Transcript of Internal Sources of Energy

Earth`s Energy Budget
Internal Sources of Energy
When Earth formed about 4.6 billion years ago, it's interior was heated by radioactive decay and gravitational contraction. Because Earth's interior is warmer than it's surface layers, hot materials move toward the surface in a process called
convection
.
Exchanges and flow
of energy
According to the
first law of thermodynamics,
energy is transferred between systems ,but cannot be created or destroyed. The
second law of thermodynamics states that when energy transfer takes place, matter becomes less organized with time.
Matter and Energy
Matter and Energy are constantly being exchanged between the spheres. This constant exchange happens through chemical reactions, radioactive decay, the radiation of energy (including light and heat), and the growth and decay of organisms.
External Energy Sources
In order for the life-supporting processes on Earth to continue operating for billions of years, energy must be added to the Earth system. Even the chemical reactions that break down rock into soil require solar energy.
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