Geothermal power is a form of renewable energy generated from heat that naturally occurs within the Earth. Radioactive materials, such as uranium and potassium, decay and produce heat deep underground, which is reachable... More »

The primary heat source for the Earth is the radioactive decay of uranium, thorium and potassium, found in the mantle and crust. The Earth produces more heat through phase changes, such as the freezing of liquid iron in ... More »

Geothermal energy is created at the center of the Earth, around 4,000 miles below the surface, through hot spots in plate boundaries. These hot spots contain more energy than all the gas and oil resources in the world an... More »

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Wind energy is a form of renewable energy produced through machines that use wind as their power source. Wind energy is only possible because of the sun. More »

Convection currents occur in the Earth's geosphere, atmosphere and hydrosphere when heat is transferred from one place to another. Heat energy moves from hot places to cold places during convection. More »

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Surrounding air superheats to more than 18,000 degrees Fahrenheit, expands outward rapidly and produces the strong soundwaves known as thunder when the electrical energy of lightning is discharged in Earth's atmosphere. ... More »

Geothermal power plants work by harnessing natural heat from Earth's interior to generate energy in the form of electricity. Geothermal energy is a renewable power source. The four types of geothermal power plant are bin... More »