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Earth Science Crossword

A nourishment level in a food chain
The forms of a marine life that live on or on top pf the ocean floor
Animal plankton
Area of the deep ocean floor between the continental margin and the oceanic ridge
A rapid change in water depth
2% percent of the ocean
The portion of dissolved salts to pure water
Moves with ocean currents
Upper part of ocean where it gets photosynethisis
Gently sloping surface at the base of the continental slope
Electric depth sounding mechanism
A small under craft used for deep sea reaserch
Process which plants get energy
Open ocean of any depth
Moves by itself
The study of ocean
The area where land and sea meet and overtop
18% percent of the ocean
80% percent of the ocean
A group of interrelated food chains