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32 Cards in this Set

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  • Back
Acid desposition
Sulfur oxides and nitrogen oxides, emitted by bruning fossil fules, enter the atmosphere-where they combine with oxygen and water to form sulfuric acid and nitric acid-and return to Earth's surface.
Acid precipitation
Conversion of sulfur oxides and nitrogen oxides to acids that return to Earth as rain, snow, or fog.
Active solar energay systems
Solar energy system that collects energy through the use of mechanical devices like photovaltaic cells or flat-plate collectors.
Air pollution
Concentration of trace substances, such as carbon monoxide, sulfur dioxide, nitrogen oxides, hydrocarbons, and solid particulates, at a greater level than occurs in average air.
Animate power
Power supplied by animals or people.
Biochemical oxygen demand
Amount of oxygen required by aquatic bacteria to decompose a given load of organic waste; a measure of water pollution.
Biomass fuel
Fuel that derives from plant material and animal waste.
Breeder reactor
A nuclear power plant that creates its own fuel from plutonium.
Chlorofluorocarbo (CFC)
A gas used as a solvent, a propellant in aerosols, a refrigerant, and in plastic foams and fire extinguishers.
Desertification
Degradation of land, especially in semiarid areas, primarily becaude of human actions like excessive crop planting, animal grazing, and tree cutting.
Fission
The splitting of an atomic nucleus to release energy.
Fossil fuel
Energy source formed from the resuidue of platns and animals buried millions of years ago.
Fusion
Creation of energy by joining the nuclei of two hydrogen atoms to form helium.
Geothermal energy
Energy from steam or hot water produced from hot or molten underground rocks.
Green Revolution
Rapid diffusion of new agricultral technology, especially new high-yield seeds and fertilizers.
Greeenhouse effect
Anticipated increase in Earth's temperature, caused by carbon dioxide trapping some of the radiation emitted by the surface.
Hydroelectric power
Power generated from moving water.
Inanimate power
Power supplied by machines.
Nonrenewable energy
A source of energy that is a finite supply capable of being exhausted.
Ozone
A gas that absorbs ultraviolet solar radiation, found in the stratosphere, a zone between 15 and 50 kilometers above Earth's surface.
Passive solar energy systems
Solar energy system that collects energy without the use of mechanical devices.
Photochemical smog
An atmospheric condition formed through a combination of weather conditions and pollution, especially from motor vehicle emissions.
Photovoltaic cell
Solar energy cells, usually made from silicon, that collect solar rays to generate electricity.
Pollution
Addition of more waste than a resource can accommodate.
Potenial reserve
Then amount of energy in desposits not yet identified but though to exist.
Proven reserve
The amount of a resource remaining in discovered deposits.
Radioactive waste
Particles from a nuclear reaction that emit radiation; contact with such particles may be harmful or lethal to people and must therefore be safely stored fro thousands of years.
Renewable energy
A resource that has a theoretically unlimited supply and is not depleted when used by humans.
Resource
A substance in the environment that is useful to people, is economically and technologicaly feasible to access, and is socially acceptable to use.
Sanitary landfill
A palce to deposit solid waste, where a layer of earth is bulldozed over garbage each day to reduce emissions of gases and odors from the decaying trash, to minimize fires, and to discourage vermin.
Sustainble agriculture
Farming methods that preserve longterm productivity of land and and minimize pollution, typically by rotating soil-restoring crops with cash crops and reducing inputs of fertilizer and pesticides.
Sustainable development
The level of development that can be maintained in a country without depleting resources to the extent that future generations will be unable to achieve a comparable level of development