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Write out the question and answer on BR Sheet
September 26, 2011 Write out the question and answer on BR Sheet
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Finish Textbook review and study for test!
Objective Agenda Compare renewable and non-renewable resources found in Virginia Natural Resource Notes Bill Nye: Energy Rocks and Mineral review: Page 118 questions 1-5 Page 148 questions 1-5, 11-13 Page 176 questions 1,4,5,9,10,11 Homework: Finish Textbook review and study for test!
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Natural Resources
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Natural Resources any material from the earth that can be used in some way by people.
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Renewable can be replaced in time (Lifetime) 1. Water 2. Trees
3. Air (oxygen & carbon dioxide) What are two more renewable resources?
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Nonrenewable cannot be replaced or can only be replaced very slowly (not in our lifetime).
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Nonrenewable Mineral deposit – any rock that contains a significant amount of mineral. Ore – if the deposits contains enough mineral to mine and make a profit Fossils Fuels – hydrocarbons made from once living things. A. Coal (Virginia most important fossil fuel!) B. Oil C. Natural Gas
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How can we conserve (save) natural resources?
The 3 Rs of Conservation: 1. Reduce (use less) 2. Reuse ( reuse instead of throwing away) 3. Recycle (if possible)
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What are some problems with fossils fuels?
Acid rain – burning coal releases sulfur dioxide which mixes with rain to form sulfuric acid. Strip mining – damages habitats of animals and plants. Deep mining – hazardous! Smog – chemical fog formed when chemicals from car exhaust mixes with sunlight
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What are some alternative energy sources?
Nuclear fission –splitting atoms to release energy. Problem: Radioactive wastes! Must be cooled, so power plants don’t melt down! Fusion - combining small atoms to form larger ones (like in the sun). Problem: requires high temperatures. Solar energy Problem: can only be stored in small amounts; sun doesn’t always shine.
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What are some alternative energy sources?
Wind – caused by differential heating of the earth and air. Problem: blocked by mountains Plants – store energy in biomass. Geothermal energy – escaping steam from the earth can be used to generate electricity. Hydroelectric – using water to generate electricity. Problem: dams destroy habitats.
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