Exam I
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What are the four general challenges to renewable energy?
• New tech • Economies of scale(too small) • Externalized cost • Limited consumer knowledge
What are the main causes of climate change?
Solar radiation, Earths obit, human influences, greenhouse gases.
What are greenhouse gases?
Molecules that are trapped in earth’s atmosphere, such as H2O and CO2, that release heat.
What is primary energy?
Energy contained in natural resources. Non-renewable and renewable
What is secondary energy?
Primary converted into another form. Electricity
Kinds of non-renewable energy
Coal, oil, natural gas, nuclear power, electric power.
Kinds of renewable energy
Solar, biomass, wind, hydro power, ocean, geothermal.
Forms of coal
Lignite, sub-bituminous, bituminous, anthracite
Oil
Found in few places, beneath rock, crude oil —> refined
Natural gas
Fracking used to remove from shale deposits, converted to liquid gas
Nuclear power
Uses heat from fission and uranium, dangerous to environment
Electric power
Powers most of the world
Solar energy
Passive vs. active, intermittent/ regional
Biomass energy
Wood and other plant matter, carbon neutral, impacts on environment
Wind power
Driven by sun, no fuel/ pollution, intermittent/ regional
Hydro power
Most abundant, fuel/ pollution free, intermittent/ regional, disrupts ecosystems
Ocean energy
Tides/ waves, fuel/ pollution free, limited
Geothermal energy
Uses heat from Earth’s interior, pollution free, regional