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30 Cards in this Set

  • Front
  • Back
acute toxicity
a serious effect, such as a burn, illness, or eath, that occurs shortly after exposure to a hazardous substance.
alpha radiation
a type of radiation consisting of a particle wiht two neutrons and two protons.
an impervious confininglayer of an aquifer.
a porous layer of earth material that becomes saturated with water.
a partially permeable layer in an aquifer.
artesian well
the result of a pressurized aquifer being penetrated by a pipe or conduit, within which water rises without being pumped.
plant hormones that stimulate growth.
beta radiation
a type of radiation consisting of electrons released from the nuclei of many fissionable atoms.
the buildup of a material in the body of an organism.
biochemical oxygen demand
the amount of oxygen required by microbes to degrade organic molecules in aquatic ecosystems.
kinds of chemicals that kill many different types of living things.
able to be broken down by natural biological processes.
a measure of the variety of kinds of organisms present in an ecosystem.
the increses in the amount of material in the bodies of organisms at successively higher trophic levels.
any accumulation of organic material produced by living things.
inserting specefic pieces of DNA into the genetic makeup of organisms
buildings and land that have been abandoned because they are contaminated and the cost of cleaning up the site is high.
a class of soft pesticides that work by interfering with normal nerve impulses
a substance that causes cancer
chemical weathering
processes that involve the chemical alteration of rock in such a manner that is more likely to fragment or to be dissolved.
chronic toxicity
a serious effect, such as an illness or death, that occurs after prolonged exposure to small doses of a toxic substance
clear cutting
a forest harvesting method in which all the trees in a large area are cut and removed
the process of harnessing the natural process of decomposition to transform organic materials into compost, a humus-like material with many environmental benefits
contour farming
a method of tilling and planting at right angles to the slope which reduces soil erosion by runoff.
ability of a chemical to degrade standard materials.
the thin, outer, solid suface of the earth
the conservation of arid and semiarid lands into deserts by inapproriate farming practices or overgrazing
economic cost
those monetary costs that are necessary to exploit a natural resource.
endangered species
those species that are present in such small numbers that they are in immediate jeopardy of extinction
energy cost
the amount of energy required to exploit a resource