What are the three motions of the ocean?

• continental shelf, continental rise, continental slope
• waves, tides, currents

Surface currents are caused by ___________.

• temperature and salinity
• wind

The Gulf Stream is a ______________ current.

• surface
• deep ocean

Rainfall and river runoff cause the salinity to _________________. 

• increase
• decrease

TRUE or FALSE
Ocean salinity is greater when there is ice formation and evaporation.

• TRUE
• FALSE

• continental rise
• continental slope

• trench
• seamount

What provides most of the Earth's oxygen?

• air
• phytoplankton

Where can a lot of the animals in the ocean be found?

• continental shelf
• abyssal plain

• tides
• currents