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RENEWABLE RESOURCES Resources that can be used over and over again to produce energy without fear of running out. These resources replenish themselves naturally. Solar Energy • • • • • Heat energy** Light energy** Used to tell time Can be used for cooking Can be used to help purify water Wind Power • The use of wind energy dates back thousands of years. • It was originally used to pump water for wind mills. • Generates electricity Hydroelectric Energy • Electric energy produced by the action of falling water • Electricity generated by water flowing downhill Biomass Energy • Energy from the sun is necessary for biomass energy • Biomass energy contains energy stored from the sun - plants and photosynthesis • Biomass = natural materials • Form of electricity produced from plant/animal waste • Energy that can be used through the use of burning (sawdust, tree bark, trees, grasses) Biomass Energy • Biomass can pollute the air when it’s burned, but not as much as fossil fuels • Biomass releases carbon dioxide, which is also known as a Greenhouse Gas (greenhouse gases are bad for the environment because they trap heat from the sun in the Earth’s atmosphere) Biomass Energy • Burning Wood • Using corn as fuel • Biodiesel is a form of fuel made with vegetable oils, fats, grease (recycled from restaurants sometimes) Geothermal Energy • Energy generated by converting hot water or steam from deep beneath the Earth’s surface into electricity • Heat transferred from the Earth’s core • Natural heat can be used to generate electricity and heat homes and businesses Wave/Tidal Energy • Energy powered from the surface of waves • Rise and fall of waves causes rotation of object so energy can be made NON-RENEWABLE RESOURCES • A natural resource that cannot be remade, re-grown, or regenerated • Exists in a fixed amount that is used up faster than it can be made by nature Non-Renewable Resources • Non-renewable resources are also called fossil-fuels. The natural resources (coal, oil, natural gas, and nuclear energy) are named this because of fuels found in the top layer of the earth’s crust Coal • Formed in swamps where plant remains were saved by water and mud • Coal is a burnable black rock • It is the largest single source of fuel for electricity world-wide • Coal is dug up from the ground by surface mining or deep mining Crude Oil or Petroleum • Naturally occurring liquid found within the earth • Burned oil generates heat, electricity, and sometimes lighting. • Used for powering engines Natural Gas • Cleanest and safest of energy sources • Odorless, colorless gas that smells sometimes like rotten eggs • Sources of natural gas are swamps, marshes, and landfills • Delivered to homes through pipelines • Natrual gas is used for heating, cooking, and bunsen burners Nuclear Energy • Nuclear energy relies on the splitting of the element Uranium atoms in a process called fission. This generates heat for producing steam that then makes a turbine produce electricity