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Science-Unit 3 Vocab

TermDefinition
Natural Resource Anything that occurs naturally in the environment and is used by people.
Pollution The contamination of Earth's land, water, or air.
Point Scource A specific pollution source that can be identified.
Nonpoint Scource A widely spread source of pollution that is difficult to link to a specific point of origin.
Environmental Science The study of natural processes in the environment and how humans can affect them.
Renewable Resources A resource that is either always available or is naturally replaced in a relatively short time.
Nonrenewable Resources A natural resource that is not replaced in a useful time frame.
Sustainable Use The use of a resource in ways that maintain the resource at a certain quality for a certain period of time.
Ecological Footprint The amount of land and water that individuals use to meet their resource needs and to absorb the wastes that they produce.
Conservation The practice of using less of a resource so that it can last longer.
Exponential Growth Something that occurs when a population grows at an ever-increasing rate.
Clear-Cutting The process of cutting down all the trees in an area at once.
Selective Cutting Cutting down only some trees in a forest and leaving a mix of tree sizes and species behind.
Sustainable Yield An amount of a renewable resource such as trees that can be harvested regularly without reducing the future supply.
Fishery An area with a large population of valuable ocean organisms.
Aquaculture The practice of raising fish and other water dwelling organisms for food.
Biodiversity The number of different species in an area.
Keystone Species A species that influences the survival of many other species in an ecosystem.
Genes A sequence of DNA that determines a trait and is passed from parent to offspring.
Extinction The disappearance of all members of a species from Earth.
Endangered Species Species in danger of becoming extinct in the near future.
Threatened Species Species that could become endangered in the near future.
Habitat Destruction The loss of a natural habitat and the major cause of extinction.
Habitat Fragmentation Breaking larger habitats into smaller, isolated pieces, or fragments.
Poaching The illegal killing or removal of wildlife from their habitats.
Captive Breeding The mating of animals in zoos or on wildlife preserves.
Created by: zjo201027171
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