Composition and Structure of Earth's Ocean

Salt water mixed with freshwater is

Earth's ocean formed when rain filled deep basins on Earth.

How did ocean water become salty?

What happens to density as depth increases in oceans?

Evaporation in polar regions cause surface water to become saltier.

Which zone does not receive any sunlight?

The large, flat areas of the seafloor that extend across the deepest parts of the ocean basin

Asteroids and comets might also have added water to the oceans.

What is the term for an uncrewed submersible used to explore the seafloor

_______________ are the deepest parts of the ocean.

On average, the salinity of seawater is 55 parts per thousand

Abyssal plains are ______________________ on the ocean floor.

The continental shelf, continental slope, and contiental rise are regions of the continental

Manganese nodules are mineral resources from the ocean floors.

Only organism in the ______________ can make food.