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Geothermal Energy (5 Activities)

DEPARTMENT OF Energy Efficiency & Energy EDUCATION AND WORKFORCE DEVELOPMENTR enewable EnergyENERGY Geothermal Energy (Five Activities) Grades: 5-8 Topic: Geothermal Authors: Laura J. W. Butterfield, , Brandon A. Gillette, and Richard Shin Owner: National Renewable Energy Laboratory This educational material is brought to you by the Department of Energy s Office of Energy Efficiency and Renewable Energy . Geothermal Energy Laura J. W. Butterfield, Brandon A. Gillette Richard Shin Middle School For the Teacher Deep inside the Earth, at depths near 150 kilometers, the temperature and pressure is sufficient to melt rock into magma. As it becomes less dense, the magma begins to flow toward the surface. Once it breaks through the crust it is referred to as lava. Lava is extremely hot; up to 1,250 C. Average lava temperatures are about 750 C. A normal household oven only reaches temperatures near 260 C (500 F)!

surface. Once it breaks through the crust it is referred to as lava. Lava is extremely hot; up to 1,250 °C. Average ... geothermal potential is low. The internal heat energy of the Earth and the insulation from surface rocks and soils keep the subsurface at a near constant temperature of about 55 °F (13

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