765 areas in the united states
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The oxygen-rich surface water blends with the deeper, depleted water. The dissolved oxygen concentration in the mix can be too low to support life in the pond. Both fish and plankton can die from low dissolved oxygen following a turnover. ... Thus, turnover can happen if a cold rain and wind cools the surface wate
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Answer:
I dont know what your experiment is but the control variable is the thing your keeping the same.
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