4.1 Energy and Mineral Resources Renewable resources can be replenished over fairly short spans of time, such as months, years, or decades. Nonrenewable resources take millions of years to form and accumulate. Renewable and Nonrenewable Resources
4.1 Energy and Mineral Resources Fossil fuels are hydrocarbons that may be used as fuel, including coal, oil, and natural gas. Fossil Fuels (nonrenewable)
4.2 Alternate Energy Sources In nuclear fission, (not fusion) the nuclei of heavy atoms such as uranium-235 are bombarded with neutrons. The uranium nuclei split into smaller nuclei and emit neutrons and heat energy. Alternative Energy Resources Nuclear Energy (nonrenewable)
4.2 Alternate Energy Sources Concerns remain about the use of nuclear energy safety. Accidents have occurred; radioactive material is dangerous and transport and disposal of material problematic. However it is mainly a nonpolluting method of generating electricity. Nuclear Energy (nonrenewable)
4.2 Alternate Energy Sources 1. Solar energy’s “fuel” is free. Solar energy has two advantages: 2. Solar energy is non-polluting. Solar energy has some disadvantages: Solar Energy (renewable)
4.2 Alternate Energy Sources In the next 50 to 60 years, wind power could meet between 5 to 10 percent of the country’s demand for electricity. Wind Energy (renewable)
4.2 Alternate Energy Sources The strong water flow that results drives turbines and electric generators. The water held in a reservoir behind a dam is a form of stored energy that can be released through the dam to produce electric power. Hydroelectric power is the power generated by falling water. Hydroelectric Power
4.2 Alternate Energy Sources Hot water is used directly for heating and to turn turbines that generate electric power. Geothermal energy is harnessed by tapping natural underground reservoirs of steam and hot water. Geothermal Energy
The Geysers Is the World’s Largest Electrical Geothermal Facility
4.2 Alternate Energy Sources Tidal power is harnessed by constructing a dam across the mouth of a bay or an estuary in coastal areas. The strong in-and-out flow of tidal water drives turbines and electric generators. Tidal Power
4.2 Electrification of America 1750-1850 Industrial revolution (steam power, coal mining, iron, gas lights, cotton spinning) 1930-1950 Rural electrification of America. Early 1900’s to about 1930 cities “wired” for electricity . 1879 Edison invents the light bulb. 1888 Tesla joins Westinghouse develops AC motor and power transmission system Timeline
4.2 Automobiles in America 1930 many people rode horses and use mass transit by 1950 most middle class owned a car . 1903 Ford Motor Company incorporated. 1928 campaign slogan “A chicken in every pot and a car in every garage”.
4.2 Florida Energy FL has only minor gas/oil reserves Solar, nuclear, biomass and wind options . FL energy consumption among highest states in country (residential/transportation highest, industry low) Possible large oil deposits off west coast Ethanol from citrus peel waste?