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Science Vocab 3

Across
The surroundings or conditions in which an organism lives
A source of supply or support
A prolonged period of abnormally low rainfall
Changes or discoveries in technology that bring development
All the members of a species living in a given area
To gradually wear away
The process of clearing forests
The maximum population size that can be supported by available resources
Down
A material supplied by nature that can be used by people
The dying out of a species
Existing or occurring in large amounts; plentiful
The development of land for houses and other buildings
The impact of human activities measured
Able to be maintained at a certain rate or level
A marked effect or influence