2.  Examples: metals arable land fossil fuels old-growth forests coal oil water power

3. Advantages:  Stays for a long time  They are constant Disadvantages:  Expensive  Can harm wildlife  Not reliable  Some put off carbon dioxide (biomass)  Examples:  Sun  Wind  Water  Geothermal energy

4. Advantages:  We need it to make gasoline Examples:  Fossil fuels Disadvantages:  Acid rain  Pollution

5. Advantages: a chemical energy is changed into heat and light Examples:  Coal  Oil  Natural gas Disadvantages: pollutes the atmosphere

6. Advantages: changes a chemical to heat and light Examples:  Lignite  Bituminous  Anthracite Disadvantages: pollutes the atmosphere

7. Advantages:  Changes into heat and light  Power vehicles  Power stoves, ovens, fireplaces Examples:  Lamp oil  Gasoline  Diesel fuel  Crude oil Disadvantages:  Develops over long periods of time  Air pollution  Water pollution

8. Advantages:  Renewable  Does not cause hazardous/toxic pollution Examples:  Solar panels  Flat mirrors Disadvantages:  We do not have the technology to harness all of its energy  Cover large areas with solar panels  Noise pollution

9. Advantages:  Renewable  Nonpolluting (air, land)  Not harmful to the environment  Does not produce waste Examples:  Windmills  wind farms Disadvantages:  Few regions have winds strong enough to generate electricity on a large scale  Noise pollution

10. Advantages: does not cause pollution and it is renewable Examples:  Niagara Falls  Water falls  Dams Disadvantages:  Reservoirs behind the dam can fill up with sediment  Increased erosion

11. Advantages:  Iceland and California use hot water and steam from geysers to heat their homes. Examples:  Geysers  Hot springs Disadvantages:  Sometimes not found, close to Earth’s surface  Can release hot, salty water at Earth’s surface

12. Advantages:  only makes up 8 % of the total energy used in the U.S.  Power entire cities Examples: power plants uranium Disadvantages:  Storing nuclear waste makes its use limited  Radioactive wastes  Nuclear accidents

13. Advantages: part of water cycle, so it is renewable Example:  Used in industries and on farms Disadvantages: it takes a long time for it to move through rock layers

14. Advantages: take in carbon and stores it Examples:  Yellowstone  Yosemite Disadvantages: no forests = more carbon in the atmosphere (might cause global warming)

15. Advantages:  Sometimes large deposits of valuable minerals are found in one place  Can be mined for profit Example:  hematite makes motorcycle parts and saw blades, diamonds, gold, etc. Disadvantages:  Costs a lot to get the minerals out of the rocks  Air pollution  Water pollution

16. Definition: any nonliving part of the environment Examples:  Air current  Temperature  Moisture  Light  Soil

17. Definition: any living or once living organism in the environment Examples:  Animals  Plants  Insects  Humans