Earth's Energy
Sun, 08/25/2019 - 14:41 - Adarsh
Exam Prep Study Notes (Things to remember)
Energy Resources
- According to the law of conservation of energy, energy is neither created or destroyed.
- Renewable resources can be replaced at the rate they are being used.
- Nonrenewable resources are available in limited amounts or are being used faster than they can be replaced.
Nonrenewable Energy Resources
- Coal, oil and natural gas are all fossil fuels formed from the remains of once living organisms.
- Coal is our largest source of energy for producing electricity.
- Mining and using coal produce many environmental impacts, including carbon dioxide emissions and acid rain.
- Oil and natural gas are important sources of energy for many types of vehicles and uses in our homes and industry.
- Nuclear energy is produced by splitting atoms. It also produces radioactive wastes that are very dangerous for many years.
- Fossil fuels are nonrenewable sources of energy that produce environmental damage.
Renewable Energy Resources
- Solar energy, water power, wind power, biomass energy and geothermal energy are renewable energy sources.
- Solar energy can be used either by passively storing and holding the sun’s heat, converting it to electricity or concentrating it.
- There are many ways to use the energy of moving water including hydroelectric dams.
- Wind power uses the energy of moving air to turn turbines.
- Biomass energy uses renewable materials like wood or grains to produce energy.
- Geothermal energy uses heat from deep within the earth to heat homes or produce steam that turns turbines.
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