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Currentsdeepandsurface

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

 1. 

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

 2. 

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

 3. 

The most important difference between a surface current and a density current is
a.
density currents are caused by the wind
c.
surface currents are caused by heavier water sinking through cold water
b.
surface currents move deep, cold water
d.
density currents move deep, cold ocean water to the surface
 

 4. 

We know that the coriolis effect and prevailing winds affect the direction of currents, but which of these also affects currents?
a.
Moon’s gravity
c.
earthquakes
b.
continental deflection
d.
icebergs
 

 5. 

Along the equator, what can cause a density current?
a.
rapid evaporation
c.
the Trade Winds
b.
prevailing winds
d.
continental deflection
 

 6. 

What brings nutrients up from the ocean floor?
a.
continental deflection
c.
surface winds
b.
upwelling
 

 7. 

Surface currents are moved by the wind.  What else can cause currents to move?
a.
the Moon
c.
density
b.
earthquakes
d.
plankton
 

 8. 

A current that is caused by the differences in hot and cold water or salty and fresh water is a
a.
surface current
c.
a density current
b.
a gyre
d.
the Gulf Stream
 

 9. 

mc009-1.jpg
What kind of currents do gyres carry along the East coast of continents?
a.
cold surface currents
c.
cold density currents
b.
warm surface currents
d.
super salty density currents
 

 10. 

mc010-1.jpg
What temperature water is the North Pacific Gyre carrying along the California coast?
a.
warm water
c.
a cold density current
b.
cold water
d.
a warm density current
 

 11. 

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

 12. 

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

 13. 

Deep currents are caused mostly by
a.
surface winds.
b.
differences in density.
c.
the Coriolis effect.
d.
upwelling.
 

 14. 

   The section of a continent that lies just off the shoreline and extends beneath the ocean is called the continental  
a.
  plain.  
c.
  basin.  
b.
  shelf.  
d.
  ridge.  
 

 15. 

What is the main cause of the Gulf Stream?
a.
storms
c.
winds that blow in regular directions
b.
winds that blow now and then
d.
the moon’s gravity
 

 16. 

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

 17. 

The map shows ocean currents in the northern Atlantic Ocean. Which location most likely has the warmest climate?  
mc017-1.jpg
a.
  location A  
c.
  location C  
b.
  location B  
d.
  location D  
 

 18. 

How would the climate change in Europe if the Gulf Stream were to stop?
a.
it would not change
c.
it would be much colder
b.
it would be much warmer
d.
there is no way to know
 

 19. 

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

 20. 

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

 21. 

   Which natural force creates surface ocean currents?  
a.
  gravity  
c.
  earthquakes  
b.
  sunlight  
d.
  wind  
 

 22. 

   The phenomenon that causes the winds to be deflected to the left or right due to Earth's rotation is called  
a.
  Steno's laws.  
c.
  the nebular hypothesis.  
b.
  the Coriolis effect.  
d.
  differentiation.  
 

 23. 

mc023-1.jpg
What carries warm water to the United Kingdom, giving it a mild climate?
a.
North Pacific Gyre
c.
North Atlantic Gyre
b.
South Pacific Gyre
d.
Indian Ocean Gyre
 

 24. 

These surface currents are wind driven and move in large circular patterns.
a.
density currents
c.
prevailing winds
b.
gyres
d.
upwellings
 

 25. 

Continental deflection is
a.
when warm salty water rises over cold fresh water.
c.
when a current changes direction because of the Earth’s rotation.
b.
when a deep current becomes a density current
d.
when a current changes direction because a continent is in its path.
 



 
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