Review of Definitions
Organism
Population
Community
Ecosystem
Features of an Ecosystem
 Constant environment
 Same general level of rain/sunlight throughout
 Clear physical or environmental boundary (i.e., the edge of a pond is the
edge of the pond ecosystem)
Four Main Abiotic Factors
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Air
Sun
Water
Soil
Interactions Between Biotic and Abiotic
Abiotic Factor
Air
Sun
Water
Soil
What does it provide?
O2 (oxygen), CO2 (Carbon Dioxide)
Energy, Light, Warmth
Growth, Transportation of Food
Nutrients