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Tides Practice



Multiple Choice
 

 1. 

We have a high tide today at noon.  What kind of tide will we have tomorrow at about 1:00pm?
a.
low tide
c.
neap tide
b.
high tide
d.
ebb tide
 

 2. 

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

 3. 

Which of these pictures will cause a neap tide?
a.
mc003-1.jpg
c.
mc003-3.jpg
b.
mc003-2.jpg
 

 4. 

Which term refers to the area at the seashore that is underwater during high tide and exposed during low tide?
a.
neritic zone
c.
intertidal zone
b.
mid-ocean zone
d.
open-ocean zone
 

 5. 

How many high tides happen to the same spot each day?
a.
two
c.
four
b.
one
 

 6. 

What is the main cause of ocean tides?
a.
change in water temperature
c.
gravitational pull of the moon
b.
energy from the sun
d.
rotation of the earth
 

 7. 

Which of these are true about the tides?
a.
there is one high tide and one low tide every 24 hours
b.
they can happen at any time and are unpredictable
c.
they are caused by the Moon and change every 6 hours
d.
they are caused by the wind
 

 8. 

What kind of tide has the greatest tidal range?
a.
regular tide
c.
spring tide
b.
neap tide
d.
ebb tide
 

 9. 

Which of these pictures will cause a Spring tide?
a.
mc009-1.jpg
c.
mc009-3.jpg
b.
mc009-2.jpg
 

 10. 

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

 11. 

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

 12. 

What is the ebb tide?
a.
the incoming water at high tide
c.
the water that comes from a breaker
b.
the out going water at low tide
d.
the water flow caused by a tsunami
 

 13. 

When the Moon, Earth, and Sun are in line,  the differences in the tides or the tidal range is ____.
a.
lowest
c.
greatest
b.
unchanged
d.
unpredictable
 

 14. 

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

 15. 

Surface currents are pushed along by the prevailing winds.  What can make them change directions?
a.
the waves
c.
continental deflection
b.
gyres
d.
the tides
 

 16. 

What is a tide?
a.
the amount of water that seeps into the sand
c.
the daily rise and fall of ocean water levels
b.
the point at which waves break on shore
 

 17. 

If the Sun is bigger than the Moon, why does the Moon have a greater effect on the tides?
a.
the Moon is actually almost as big as the Sun
c.
the Moon is much closer than the Sun
b.
the Sun’s gravity does not affect water
 

 18. 

When the Sun, Moon, and Earth form a 90° angle, we have ____ tides.
a.
spring
c.
fall
b.
normal
d.
neap
 



 
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