Glencoe Earth Science

Chapter 18: Ocean Motion

Ocean Motion

1.
When seawater freezes, which type of current is produced?
A)upwelling
B)surface
C)density
D)coastal
2.
Currents south of the equator are turned counterclockwise because of __________.
A)cold water rising
B)the cold polar regions
C)the Coriolis effect
D)the warm equator
3.
Density currents cannot form by a(n) __________.
A)decrease in temperature
B)increase in salinity
C)windstorm
D)sinking of cold water
4.
The Coriolis effect is caused by __________.
A)density changes
B)Earth's rotation
C)salinity changes
D)temperature changes
5.
A __________ is a collapsing wave.
A)breaker
B)crest
C)tide
D)trough
6.
Which of the following is NOT true regarding a wave passing through an area away from shore?
A)The water particles remain in the same place.
B)Floating objects and water particles move forward.
C)The energy of the wave continues to move forward.
D)Floating objects rise and fall with the wave but do not move forward.
7.
Which of the following statements about waves is NOT true?
A)Waves continue to form as long as the wind is blowing.
B)Waves continue to move for long distances even after the wind stops.
C)Waves can continue to increase in height as long as wind is there.
D)Waves can only travel a short distance before disappearing.
8.
Tides are most noticeable __________.
A)during spring tides
B)in small bodies of water
C)in shallow bodies of water
D)near the equator
9.
Ocean water might have come from all of the following EXCEPT _________.
A)water vapor
B)land basins
C)torrential rains
D)volcanic eruptions
10.
Which gas enters the ocean by photosynthesis?
A)hydrogen
B)carbon dioxide
C)nitrogen
D)oxygen
11.
The height of waves depends on all of the following EXCEPT __________.
A)the length of time the wind blows
B)the speed of the wind
C)the distance over which the wind blows
D)the temperature of the water
12.
Ocean circulation resulting from wind blowing along the coast is called a(n) __________.
A)coastal current
B)surface current
C)upwelling
D)density current
13.
Salinity measures the amount of __________ dissolved in seawater.
A)oxygen
B)salt
C)hydrogen
D)sodium
14.
Which gas that is found in ocean water does NOT come from the atmosphere?
A)oxygen
B)carbon dioxide
C)chlorine
D)nitrogen
15.
Tides are caused by __________.
A)the rise and fall of water
B)the interaction between sand and seawater
C)changes in ocean salinity
D)the gravitational pull of the Sun and the Moon
16.
When salt water changes in density, a(n) __________ occurs.
A)upwelling
B)Coriolis effect
C)density current
D)surface current
17.
Cold water rises to the surface in __________.
A)density currents
B)temperature currents
C)depth currents
D)upwellings
18.
Warm surface currents affect the water temperature along the __________ coast of continents.
A)west
B)east
C)north
D)south
19.
The lowest point of a wave is called the __________.
A)crest
B)trough
C)shallow
D)breaker
20.
Low areas on Earth that filled with water to form oceans are called __________.
A)lowlands
B)salinity
C)basins
D)valleys