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IGHS Winkels

Biology Chapter 6

TermDefinition
Agriculture farming
Monoculture large fields are planted with the same crop year after year
Green revolution modern farming practices that include monoculture and the use of chemical fertilizers
Renewable resources can regenerate if they are alive or can be replenished by biochemicla cycles if they are nonliving (trees, water)
Nonrenewable resources cannot be replenished by natural processes
Sustainable development a way of using natural resources without depleting them
Soil erosion the wearing away of surface soil by water and wind
Desertification a dry climate, a combination of farming, overgrazing, and drought that turns productive areas into desert
Deforestation loss of forests
Aquaculture raising aquatic animals for human consumption
Smog a mixture of chemicals that occures as a gray-brown haze in the atomosphere
Pollutant a harmful material that can enter the biosphere through the land, air, or water
Acid rain when compounds from burning fossil fuels mixes with water vapor in the air, drops of nitric and sulfuric acids form
Biodiversity the sum total of the genetically based variety of all organisms in the biosphere
Ecosystem diversity the variety of habitats, communities, and ecological processes in the living world
Species diversity refers to the number of different species in the biosphere
Genetic diversity refers to 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
Endangered species a species whose population size is declining in a way that places it in danger of extinction
Habitat fragmentaion the splitting of ecosystems into pieces
Biological magnification concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web
Invasive species living organisms that enter new habitats and reproduce rapidly
Conservation the wise management of natural resources, including the preservation of habitats and wildlife
Ozone layer the layer of atmosphere above the Earth that contains a relatively high concentration of ozone gas
Global warming the increase in the aveage temperature of the biosphere
Created by: Winkels