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Science Definitions

Definitions of science vocabulary
by

Brook Finlayson

on 1 October 2010

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Transcript of Science Definitions

Definitions Ecosystem An area defined by an ecologist, the set of relationships between populations of species and between those populations and the abiotic(non-living) factors in their environment. Food Chain A step by step sequence linking organisms that feed on each other, starting with a food source such as a producer detritus,and continuing with a sequence of consumers Abiotic A factor in an ecosystem created by non-living agents,
for example,amount of sunlight, temperature, strength
and direction of wind Biotic A factor in an ecosystem created by the presence and roles of other living things Water Water is a chemical substance with the chemical formula H2O. Its molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid a ambient conditions but it often co-exists on Earth with its solid state, ice and gaseous state, water vapor or steam. Aquatic Ecosystem An aquatic ecosystem is an ecosystem located in a body of water. Communities of organisms that are dependant on each other and on their environment life in aquatic ecosystems Terrestrial Ecosystem A community of organisms and their environment that occurs on the land masses off continents and island. Terrestrial Ecosystems are distinguished from aquatic ecosystems by the lower availability of water. Bioindicator biological indicators are species used to monitor
the health of an environment or ecosystem Biodiversity Is the degree of variation of life forms within given ecosystem, biome, or an entire planet
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