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25 Cards in this Set

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agriculture
farming
monoculture
practice in which large fields are planted with a single variety year after year
green revolution
the development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops
renewable resources
can regenerate if they are alive or can be replenished by biochemical cycles if they are nonliving
nonrenewable resource
one that cannot be replenished by natural processes
sustainable development
a way of using natural resources without depleting them and of providing for human needs without causing long-term environmental harm
soil erosion
the wearing away of surface soil by water and wind
desertification
in areas with dry climates, a process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land into desert
deforestation
destruction of forests
aquaculture
the raising of aquatic animals for human consumption
smog
a mixture of chemicals that occurs as a gray-brown haze in the atmosphere
pollutant
a harmful material that can enter the biosphere through the land, air, or water
acid rain
rain containing nitric and sulfuric acids
biodiversity
the sum total of the genetically based variety of all organisms in the biosphere
ecosystem diversity
includes the variety of habitats, communities, and ecological processes in the living world
species diversity
the number of different species in the biosphere
genetic diversity
the sum total of all the different forms of genetic information carried by all organisms living on Earth today
extinction
occurs when a species disappears from all or part of its range
engandered species
a species whose population size is declining in a way that places it in danger of extinction
habitat fragmentation
when development splits ecosystems into pieces
biological magnification
process where concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or web
invasive species
a species that reproduces rapidly when introduced into a new habitiat
conservation
the wise management of natural resources, including the preservation of habitats and wildlife
ozone layer
atmospheric layer in which ozone gas is relatively concentrated
global warming
increase in the average temperature of the biosphere