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Tides Posttest

Multiple Choice
 

 1. 

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
 

 2. 

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

 3. 

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
 

 4. 

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
 

 5. 

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

 6. 

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
 

 7. 

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
 

 8. 

A ____ is a kind of wave that forms when a rising tide enters a shallow, narrow river from a wide area of the sea.
a.
neap tide
c.
tidal range
b.
tidal bore
d.
spring tide
 

 9. 

High spring tides generally result from
a.
the alignment of Earth, the Moon, and the Sun.
b.
thawing polar ice caps.
c.
heavy spring rains.
d.
mild earthquake activity.
 

 10. 

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
 

 11. 

Which of these pictures will cause a Spring tide?
a.
mc011-1.jpg
c.
mc011-3.jpg
b.
mc011-2.jpg
 

 12. 

If an earthquake occurs under the ocean, it might cause what?
a.
tsunami
c.
a neap tide
b.
a density current
d.
an ebb tide
 

 13. 

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
 

 14. 

Which of these pictures will cause a neap tide?
a.
mc014-1.jpg
c.
mc014-3.jpg
b.
mc014-2.jpg
 

 15. 

What is the flood 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
 



 
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