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7th Pre-AP Vocab

Science Vocabulary for 7th grade

the place at which one stream flows into another or into the sea. Influx
the progressive replacement of one community by another until a climax community is etablished Ecological Succession
the development of plant and animal life in an area without topsoil; the development of biotic communities in a previously uninhabited and barren habitat with little or no soil Primary Succession
the planar, underground surface beneath which earth materials, as soil or rock, are saturated with water. Water Table
The changes that occur after a disturbance in an ecosystem Secondary Succession
the struggle among organisms, both of the same and of different species, for food, space, and other vital requirements. Competition
stable mature community in a successive series which has reached equilibrium after having evolved through stages and adapted to its environment Climax Community
the various mechanical and chemical processes that cause exposed rock to decompose. Weathering
The first species to populate an area. Pioneer Species
An ecosystem in which all the life is balanced Stable Ecosystem
Created by: Group1-1