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10 questions
Which term best describes the rise and fall of the ocean's water level?
Sudden
Ceaseless
Random
Unpredictable
Which of the following is a true statement about gravity?
It acts on all matter in the universe.
It pushes objects away from one another.
It does not exist in outer space.
It gets weaker the closer you get to the sun.
If the sun is bigger than the moon, why does the moon have a greater effect on tides?
The sun's gravity doesn't affect water
The moon is much closer than the sun
Although the moon is smaller than the sun, it has more mass.
The earth blocks the sun's gravitational pull
High tides occur:
At either the North Pole or South Pole, depending on where the moon is.
On the side of the earth facing away from the moon only.
On the side of the earth facing the moon only.
On the side of the earth facing the moon, and also the opposite side.
Based on information from the movie, what would you expect to happen to the number of high tides in any given area if the rate of earth's rotation doubles?
They will occur about as often as before
They will occur about half as often
They will occur about four times more often
They will occur about twice as often
At one beach, high tide occurs at 8 a.m. When will the next high tide most likely occur?
Noon
4 p.m.
8 p.m
8 a.m. the next day
Which of the following is a true statement about tidal energy?
It's easy to harness
It's more efficient than solar energy
It's more powerful than the energy we get from fossil fuels
It causes very little pollution
What might happen on a beach as the tide goes out?
Sand castles built by kids might get washed away by the ocean.
The waves will almost definitely grow taller and more powerful.
There will be more sand for beachgoers to sunbathe on.
Sand dunes and other formations will begin eroding.
What might happen if the moon were only half as large as it is now?
There would be no tides
Most areas would receive fewer high tides each day
The ocean level would rise and fall less dramatically
Ocean waves would not be very large
The moon's gravity affects:
Both the solid parts of the earth and the oceans
The solid parts of the earth only
The oceans only
The moon only
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