1.
Water particles in waves move _____________.
A. 
B. 
C. 
D. 
2.
When a wave approaches shallow water, the ______________ increases.
A. 
B. 
C. 
D. 
3.
When the Moon, Earth, and Sun are in a line, the tidal range is _______________.
A. 
B. 
C. 
D. 
4.
Giant waves produced by gravity are called _____________.
A. 
B. 
C. 
D. 
5.
When the Sun, Earth, and Moon form a 90 degree angle, we have _____________ tides.
A. 
B. 
C. 
D. 
6.
Wavelength is the horizontal distance between adjacent wave ____________.
A. 
B. 
C. 
D. 
7.
Surface currents are caused by ____________.
A. 
B. 
C. 
D. 
8.
The lowest point on a wave is called the wave ____________________.
A. 
B. 
C. 
D. 
9.
Slow-moving, cold currents may rise to the surface. This ________________ of cold water carries food particles to the surface, resulting in areas of good fishing.
A. 
B. 
C. 
D. 
10.
An increase in ocean salinity can increase ______________, creating a current.
A. 
B. 
C. 
D. 
11.
Every 1 Kg of ocean water contains 35 g of _________________.
A. 
B. 
C. 
D. 
12.
Surface currents affect _____________.
A. 
B. 
C. 
D. 
The climate on continents
13.
The oceans were formed when precipitation filled low areas on Earth called _________________.
A. 
B. 
C. 
D. 
14.
When the wind blows across a body of water, ____________ between the water and the air causes the water to move.
A. 
B. 
C. 
D. 
15.
Earth's _____________ may have filled from water vapor given off by volcanoes.
A. 
B. 
C. 
D. 
16.
Once the atmosphere cooled enough, water vapor condensed and _________ began to fall onto the Earth.
A. 
B. 
C. 
D. 
17.
Oxygen enters the ocean from the atmosphere and from organisms that _____________.
A. 
B. 
C. 
D. 
18.
Dissolved calcium is carried to the ocean by _____________.
A. 
B. 
C. 
D. 
19.
Because substances are constantly being added and substances are constantly being used by plants and animals, the salinity of the oceans _____________.
A. 
B. 
C. 
D. 
20.
Sea animals and plants use substances dissolved in Earth's ___________ to form bones and shells
A. 
B. 
C. 
D. 
21.
Waters off the western coast of a continents are usually colder because of the ________ origin of the ocean currents passing by.
A. 
B. 
C. 
D. 
22.
Currents off the eastern coasts of continents generally flow from the ___________ regions of Earth.
A. 
B. 
C. 
D. 
23.
What causes the water to go back into the sea after a wave breaks onto the shore?
A. 
B. 
C. 
D. 
24.
If you were floating in a life raft in the Gulf Stream, you and the raft would _______________.
A. 
B. 
Move in a circular motion
C. 
D. 
Move with the surface current
25.
Cold, dense water around Norway, Greenland, and Labrador form _______________.
A. 
B. 
C. 
The Mediterranean intermediate water
D. 
North Atlantic Deep Water