GEOTHERMAL ENERGY

Energy is a vital force powering business, manufacturing and trans- portation of goods and services to serve the world ecenomies. There are a lot of energy sources that people can use from the world. In this point, We have a question about energy sources. Are energy sources completely consumed or finished? The answer is that some are yes, but others are no. Some of them are renewable but others are not. Renewable energy is energy generated from natural resources such as sunlight, wind, rain, tides and geothermal heat which are naturall replenished. As we said before, one of them is geothermal energy source. Geothermal comes from underground. It is the energy that exist in nature as a result of heat from the Earth's core. The Earth's core lies nearly 6000 km below the surface and holds tempratures that near 5000 santigrat degree. These extreme tempratures are enough to heat the rock surroundinf the core ( colled the mantle ) and couse the rockmm to melt. Melted rock in the mantle is colled magma. The liquid magma has a lower density than the solid rock around it, so it tends to move upwards the Earth's surface. The majority of the time, magma stays underneath the Earth's surface and heats up the rock and pockets of water that it comes in contact with. Sometimes the magma actually finds its way through the Earth's crust and vents trough volcanoes as lava. Most often, humans have not used geothermal energy from magma directly; humans have spent much time exploiting the water tables that are heated by the magma. These water sources are very often vented the surface by cracks in the crust called fissures. Once the heated water has reached the surface, humans have put it to a variety of uses. A couple of wonderful introduction to geothermal energy can be found at the Geothermal Education office and the energy web Directory. Consequently, there are a lot of process of the geothermal energy. There of them emerge that history of geothermal energy advantages and disadvantages of geothermal energy and economic effects of geothermal energy.