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1
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this water is a mixture of freshwater and saltwater
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2
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marshland located where a river empties into an ocean
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3
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floating barrier which prevents oil spills from spreading
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4
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this shelf extends out from the edge of a continent below the ocean's surface
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5
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lake zone in open water which has light penetration
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8
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this pond is very salty
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9
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lake zone which has the deepest, darkest water
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10
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green slime on the surface of ponds and lakes caused by fertilizers
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14
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this trench is the deepest part of the ocean
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15
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variety of different species living in one area
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17
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type of lake which has high concentrations of carbonates and bicarbonates
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