Multiple Choice
|
|
|
1.
|
Which of these causes ocean waves?
a. | the wind | c. | the
moon's gravity | b. | density
differences | d. | the Sun’s Gravity |
|
|
|
2.
|
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 |
|
|
|
3.
|
How many high tides happen to the same spot each
day?
|
|
|
4.
|
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 |
|
|
|
5.
|
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 |
|
|
|
6.
|
When the Sun, Moon, and Earth form a 90°
angle, we have ____ tides.
a. | spring | c. | fall | b. | normal | d. | neap |
|
|
|
7.
|
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 |
|
|
|
8.
|
What is the main force that drives surface
currents?
a. | the Moon | c. | geothermal energy | b. | the
wind |
|
|
|
9.
|
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 |
|
|
|
10.
|
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 |
|
|
|
11.
|
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 |
|
|
|
12.
|
The Gulf Stream delivers warm water to what
region?
a. | Hawaii | c. | the
East Coast of North America | b. | Western
Europe |
|
|
|
13.
|
What type of currents will flow along the ocean
floor?
a. | surface currents | c. | gyres | b. | density
currents | d. | prevailing winds |
|
|
|
14.
|
What causes the Corriolis effect?
a. | the Earth’s rotation | c. | the wind | b. | the global
conveyor belt |
|
|
|
15.
|
Surface currents can affect ____.
a. | low tides | c. | the
ocean bottom | b. | the climate on
continents | d. | high tides |
|
|
|
16.
|
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 |
|
|
|
17.
|
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 |
|
|
|
18.
|
Which of these pictures will cause a Spring tide?
|
|
|
19.
|
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 |
|
|
|
20.
|
Which of these pictures will cause a neap tide?
|