What is the main energy source for the world’s major ocean surface currents?



A.
the sun

B.
heat from inside the Earth

C.
the Moon’s gravity

D.
the movement of the Earth through space

A. the sun

Sylvia is writing a cause and effect report on ocean currents.



Which statement can she use correctly in her report?



A.
Global winds pull surface ocean water into the major ocean currents observed today.

B.
Global winds cause surface ocean currents to extend deeper beneath the surface of the water.

C.
Surface ocean currents form as a result of changes in Earth’s climate over time.

D.
Surface ocean currents are only present along coastlines of continents.

A. Global winds pull surface ocean water into the major ocean currents observed today.

The ocean contributes to the world’s climate by ______.



A.
storing salt

B.
storing heat

C.
absorbing nitrogen

D.
releasing carbon dioxide

B. storing heat