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Explore the natural process of fossil fuels' creation - from plant and animal remains transforming into coal, oil, and natural gas. Learn how sedimentary rocks play a crucial role in this energy source. Discover the significance of fossil fuels in supplying 90% of the world's energy needs.
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Fossil Fuels by: Rachel 5th grade science November 8, 2011
Sedimentary Rocks • Broken bits of rocks end up in rivers, streams and lakes. • Over time, sand and mud cover the rocks at the bottom of the water • Layers of sediment turn into sedimentary rock • Examples: Sandstone, shale and limestone
Fossil Fuels • Fossil fuels are formed by a natural process • They are made deep in the earth from plants and animals that have died • Example: Coal, Oil and Natural Gas • Supply 90% of the world’s energy
Coal • Plants die and decay into a spongy substance called Peat • The peat is covered with sand and mud • Water squeezes out and the carbon increases and coal is formed • Coal has to be mined out of the earth
Oil • Comes from plankton which died and sank to the bottom of the sea • Gets covered with sand and mud and is pressed together, turning into rock • Bacteria munches on the plankton and leaves oil behind
Natural Gas • Comes from plankton which is covered with sand and mud • It is pressed together and turns to rock • Bacteria eats the plankton and leaves a gas behind • Usually found near oil underground
Website: http://www.ecokids.ca/pub/eco_info/topics/energy/ecostats/index.cfm Google images