An area where rivers flow into the ocean and fresh water and salt water mix

Free-swimming animals that can move throughout the water column are called

a smooth, nearly flat region of the ocean floor is called

Approximately half of the ocean's surface waters are owned by

Most ocean pollution comes from

The richest deposits of oil and natural gas are often located

Most of the world's major fisheries are found near

Organisms in the deep ocean that produce their own light are called

The organisms that live around hydrothermal vents are supported by

Kelp forests grow in the

Under which conditions would there be more giant kelps in a kelp forest?

The only part of the open ocean that receives enough sunlight to support the growth of algae is

The most common plant in a salt marsh is

Which of the following features of the ocean floor forms where two plates diverge?

Explain how a mid-ocean ridge forms.

Hot liquid from Earth's mantle is called

The organisms that live around hydrothermal vents are supported by a. energy from sunlight. b. nutrients washed from the land. c. food made by algae. d. chemical nutrients from Earth's interior.

In what zone are hydrothermal vents located?

A coastal inlet or bay in which freshwater from rivers mixes with salty ocean water is called a(n)

Which classification of marine organisms includes swordfish and sharks?

What are the three classifications of marine organisms?

As ocean water in a tide pool warms and evaporates, the remaining water becomes

Many organisms that live in the rocky intertidal zone are adapted to cling to the rocks to withstand the

Coastal wetlands that feature short, gnarled trees with arching prop roots are called

Which of the following organisms is an example of nekton? a. dolphin b. dead person floating at sea c. crab d. sea star

Benthos are organisms that live on

A trench is

Where are hydro thermal vents located?