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Energy Resources: Fossil Fuels
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renewable resources: resources that can be replaced within a human lifetime or as they are used (months, years, or decades)
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air, water, animals, & plants
Examples: air, water, animals, & plants
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Nonrenewable resource: resources whose supply is limited and cannot be replaced once used (takes millions of years to form)
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examples: minerals, metals, fossil fuels
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Energy Resources fossil fuels: fuel formed from remains of living organisms examples: coal, oil, natural gas consists of compounds of hydrogen and carbons (hydrocarbons) non renewable
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carbonization: process in which plant material are changed into carbon
coal originated in swamps from remains of plants
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peat: brownish-black material produced by decomposed plant remains
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Types of coal: lignite: brown coal; made from peat deposits covered by sediments with gases and water squeezed out
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bituminous: soft coal; formed from lignite under pressure (most abundant)
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anthracite: produced when folding of earth’s crust produces high temperature and pressure
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Coal Formation Peat – partially decayed plant material
Lignite Coal – sedimentary rock (brown coal) Bituminous Coal – sedimentary (soft coal) Anthracite Coal – metamorphic (hard coal)
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Observe an animation showing coal form.
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Coal Fields in the U.S. More than 70% of the coal mined today is used in electric power plants!
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two environmental problems associated with mining and uses of coal:
1. soil erosion from strip mining 2. air pollution from sulfur dioxide released into the atmosphere
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Oil & Natural Gas Formation
animal & plant remains buried in ancient seas sediments build up, burying remains Organic remains turn into hydrocarbons under heat and pressure materials are squeezed out of mud and move into bedrock where they are mixed with water oil and gas float above water
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products of petroleum:
gasoline, medicines, plastics, tars, waxes, synthetic rubber, insecticides, detergents, synthetic fertilizers, shampoos
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Tar Sands & Oil Shales Oil Shale – Rock with waxy mixture of oil
Tar Sands - Mixture of clay, sand, water, and thick tar (oil)
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Formation of Mineral Deposits
ore: deposits of minerals from which metals and nonmetals can be removed profitably
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Hydrothermal Solutions form some of the most important mineral deposits
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examples: Fe--> magnetite and hematite Hg--> cinnabar Al--> bauxite
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Observe common objects made of minerals.
Complete Student Mineral Research Presentations
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