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Under which conditions are large numbers of fish in a lake most likely to die?
cloudy
7.0
because pollutants are filtered by rock and soil from deep within the Earth
oil spilling from a supertanker
evaporation
when the water's dissolved oxygen is low and temperatures are high
Surface water carries salt from land into the ocean.
shore
Why is water from an aquifer more likely to be cleaner than water used from other sources?
cloudy
7.0
because pollutants are filtered by rock and soil from deep within the Earth
oil spilling from a supertanker
evaporation
when the water's dissolved oxygen is low and temperatures are high
Surface water carries salt from land into the ocean.
shore
Which region of the sea is affected by changes in the tides?
cloudy
7.0
because pollutants are filtered by rock and soil from deep within the Earth
oil spilling from a supertanker
evaporation
when the water's dissolved oxygen is low and temperatures are high
Surface water carries salt from land into the ocean.
shore
A clear example of point source pollution is
cloudy
7.0
because pollutants are filtered by rock and soil from deep within the Earth
oil spilling from a supertanker
evaporation
when the water's dissolved oxygen is low and temperatures are high
Surface water carries salt from land into the ocean.
shore
Which of the following is the main reason why the ocean is salty?
cloudy
7.0
because pollutants are filtered by rock and soil from deep within the Earth
oil spilling from a supertanker
evaporation
when the water's dissolved oxygen is low and temperatures are high
Surface water carries salt from land into the ocean.
shore
A body of water that has high turbidity is
cloudy
7.0
because pollutants are filtered by rock and soil from deep within the Earth
oil spilling from a supertanker
evaporation
when the water's dissolved oxygen is low and temperatures are high
Surface water carries salt from land into the ocean.
shore
Which of these is not a threat to living ocean resources?
cloudy
7.0
because pollutants are filtered by rock and soil from deep within the Earth
oil spilling from a supertanker
evaporation
when the water's dissolved oxygen is low and temperatures are high
Surface water carries salt from land into the ocean.
shore
A neutral pH is:
cloudy
7.0
because pollutants are filtered by rock and soil from deep within the Earth
oil spilling from a supertanker
evaporation
when the water's dissolved oxygen is low and temperatures are high
Surface water carries salt from land into the ocean.
shore
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