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GEOTHERMAL ENERGY, , o The word geothermal comes from the Greek, words geo (earth) and therme (heat)., , o Geothermal energy is heat from within the earth., , o Steam and hot water produced inside the earth, can be used to heat buildings or generate, electricity., , o Geothermal energy is a renewable energy Source, because the water is replenished by rainfall and, the heat is continuously produced inside the, earth.

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ENERGY INSIDE THE EARTH, , o Geothermal energy is, generated in the earth's core,, about 4,000 miles below the, , surface., , o Temperatures hotter than the, sun's surface are continuously, produced inside the earth by, the slow decay of radioactive, particles, a process that, happens in all rocks., , , , THE EARTH'S INTERIOR

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o The core itself has two layers: a solid iron core and an, outer core made of very hot melted rock, called, magma., , o The mantle which surrounds the core and is about, 1,800 miles thick. It is made up of magma and rock., , o The crust is the outermost layer of the earth, the land, that forms the continents and ocean floors. It can be, three to five miles thick under the oceans and 15 to, 35 miles thick on the continents. The earth's crust is, broken into pieces called plates., , o Magma comes close to the earth's surface near the, edges of these plates. This is where volcanoes occur., The lava that erupts from volcanoes is partly magma., Deep underground, the rocks and water absorb the, heat from this magma. The temperature of the rocks, and water get hotter and hotter as you go deeper, underground. O

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WHERE IS GEOTHERMAL ENERGY, FOUND ? |, , o Geothermal energy can, sometimes find its way to the, surface in the form of: volcanoes, and fumaroles (holes where, volcanic gases are released) hot ,. Ring Gf Fire if, , ., , springs and geysers. " i mura, o The most active geothermal #4*, , ee tw of, resources are usually found exe vie, , along major plate boundaries (4 \, ve, where earthquakes and Fingian i, 0°, volcanoes are concentrated. ¢ aave’s, © Most of the geothermal activity - a, in the world occurs in an area as, , called the Ring of Fire., , o This area rims the Pacific, Ocean.