ocean Crossword

this is the percentage of ocean water covering earths surface
sound navigation and ranging. sound waves are sent to the ocean floor and the time it takes for them to return is measured. based on this time, a depth is calculated.
this means depth
continental margin with undisturbed sediment
latitude that has no vertical density change
latitude that has low density at the surface layer and great density in deep water
third layer where sunlight never reaches, temps are just above freezing, high density, 80% of ocean water
organisms that float with the currents (algae, animals, and bacteria)
plant like plankton, undergo photosynthesis
is the study of the physical characteristics, chemical composition, and the life forms of the ocean.
transmitted by sonar to map the ocean floor
small underwater crafts used for deep-sea research.
Only 7% of the size of the Pacific.
The Southern Hemisphere ocean, slightly smaller than the Atlantic
The ocean half the size of the Pacific and not as deep
The largest ocean with the greatest depth
the gently sloping submerged portion of the continental margin, extending from the shoreline to the continental slope
the gently sloping surface at the base of the continental slope
The area which forms the "drop-off" between the continental shelf and the continental rise
the flat, broad region of the ocean floor with almost no slope and covered by sediments