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When water in a lake mixes due to changing seasons, this is called __________.
turnover
single-celled organisms
glaciers
dumping used motor oil into a stream
point source
It could form a depression that fills with water.
Eutrophication
It must be covered in water sometime during the year.
What type of pollution is easiest to stop?
turnover
single-celled organisms
glaciers
dumping used motor oil into a stream
point source
It could form a depression that fills with water.
Eutrophication
It must be covered in water sometime during the year.
An example of point source pollution is __________.
turnover
single-celled organisms
glaciers
dumping used motor oil into a stream
point source
It could form a depression that fills with water.
Eutrophication
It must be covered in water sometime during the year.
How can the movement of Earth's crust form a lake?
turnover
single-celled organisms
glaciers
dumping used motor oil into a stream
point source
It could form a depression that fills with water.
Eutrophication
It must be covered in water sometime during the year.
What formed the Great Lakes?
turnover
single-celled organisms
glaciers
dumping used motor oil into a stream
point source
It could form a depression that fills with water.
Eutrophication
It must be covered in water sometime during the year.
What organisms live in all parts of a lake?
turnover
single-celled organisms
glaciers
dumping used motor oil into a stream
point source
It could form a depression that fills with water.
Eutrophication
It must be covered in water sometime during the year.
A lake has filled up and become dry land. What caused this?
turnover
single-celled organisms
glaciers
dumping used motor oil into a stream
point source
It could form a depression that fills with water.
Eutrophication
It must be covered in water sometime during the year.
What is a requirement for an area to be a wetland?
turnover
single-celled organisms
glaciers
dumping used motor oil into a stream
point source
It could form a depression that fills with water.
Eutrophication
It must be covered in water sometime during the year.
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Match it!
Match it!