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Vocab puzzle

Science Vocab 
Across
the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
the factor that limits the reaction rate in any physiological process governed by many variables
a system of interlocking and interdependent food chains.
the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.
interaction between two different organisms living in close physical association, typically to the advantage of both.
The amount of people that live in a square mile
This term means a biological community of interacting organisms and their physical environment
Down
a hierarchical series of organisms each dependent on the next as a source of food.
This term relates to non-living things
This is a term relates to living things
the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
This term relates to a group of people living in the same place
In biology, a population is all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding.
the natural home or environment of an animal, plant, or other organism. "wild chimps in their natural habitat"
a position or role taken by a kind of organism within its community. Such a position may be occupied by different organisms in different localities, e.g., antelopes in Africa and kangaroos in Australia.