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Currents  and Waves Final

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The Gulf Stream is an example of a
a.
gyre
c.
prevailing wind current
b.
coriolis
d.
density current
 

 2. 

Wavelength is the distance between two wave ____.
a.
crests
c.
tides
b.
particles
d.
breakers
 

 3. 

The Gulf Stream and North Atlantic Current both affect Europe's climate. What type of current are they?
a.
warm deep currents
b.
warm surface currents
c.
cold surface currents
d.
cold deep currents
 

 4. 

A large stream of moving water that flows through the oceans is called a(n)
a.
undertow.
b.
tide.
c.
wave.
d.
current.
 

 5. 

Which of these causes ocean waves?
a.
the wind
c.
the moon's gravity
b.
density differences
d.
the Sun’s Gravity
 

 6. 

Which letter on this wave is the crest?
mc006-1.jpg
a.
A
c.
C
b.
B
 

 7. 

What two forces cause the Gulf Stream to carry warm water to Europe?
a.
the West Winds and the Trade Winds
c.
the prevailing winds and the coriolis effect
b.
the sun and the wind
d.
surface currents and density currents
 

 8. 

What causes the winds and the currents to curve?
a.
huge seamounts
c.
the continents
b.
the coriolis effect
d.
the Gulf Stream
 

 9. 

The Gulf Stream is what kind of current?
a.
a density current
c.
a fresh water ocean current
b.
a surface current
 

 10. 

What type of currents will flow along the ocean floor?
a.
surface currents
c.
gyres
b.
density currents
d.
prevailing winds
 

 11. 

   The distance between a wave's crest and its trough is known as its  
a.
  wave height.  
c.
  wave length.  
b.
  water depth.  
d.
  low tide measurement.  
 

 12. 

   London is much farther north than Chicago, yet it is warmer in London in the winter than it is in Chicago. Why is this true?  
a.
  London's climate is affected by warm ocean currents that flow from the south. 
b.
  The Sun's rays shine at a higher angle in London than in Chicago.  
c.
  Waters around England are warmed by many underwater volcanoes.  
d.
  London receives more sunshine in the winter than other places farther south.  
 

 13. 

Tropical seas have a high rate of evaporation. Because of this, the water in tropical seas will have higher:
a.
wave crests.
c.
salt concentrations.
b.
amounts of algae.
d.
daily temperatures.
 

 14. 

In the Northern Hemisphere, currents curve to the right because of the
a.
Coriolis effect.
b.
density.
c.
longshore drift.
d.
moon's gravity.
 

 15. 

Surface currents can affect ____.
a.
low tides
c.
the ocean bottom
b.
the climate on continents
d.
high tides
 

 16. 

What do you call the distance between two wave crests?
a.
frequency
c.
wavelength
b.
amplitude
 

 17. 

What is a cause of waves and currents but not tides?
a.
the sun’s cravity
c.
the moon’s gravity
b.
Earth’s gravity
d.
wind
 

 18. 

What causes the water to go back into the sea after a wave breaks onto the shore?
a.
gravity
c.
Coriolis effect
b.
density
d.
friction
 

 19. 

Which of these statements about currents is true?
a.
all currents are caused by the wind
b.
some currents are caused by a difference in either density or temperature and others are caused by the wind
c.
all currents are caused by the sun
d.
all currents move in the same direction
 

 20. 

What causes the Corriolis effect?
a.
the Earth’s rotation
c.
the wind
b.
the global conveyor belt
 

 21. 

The lowest point on a wave is the wave ____.
a.
tide
c.
height
b.
trough
d.
crest
 

 22. 

   The highest point of a wave is its  
a.
  crest.  
c.
  trough.  
b.
  swell.  
d.
  breaker.  
 

 23. 

The Gulf Stream delivers warm water to what region?
a.
Hawaii
c.
the East Coast of North America
b.
Western Europe
 

 24. 

What is the main force that drives surface currents?
a.
the Moon
c.
geothermal energy
b.
the wind
 

 25. 

If you were floating in a raft in the Gulf Stream, you and the raft would ____.
a.
move back and forth
c.
move with the current
b.
move in a circular motion
d.
not move with the water
 



 
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