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- 1. Multiple Choice
What are the "plates" that meet in subductive zones?
collections of debris from the ocean floor
huge slabs of concrete
chunks of lava from volcanoes
pieces of the earth's crust
- 2. Multiple Choice
Place the following events in sequence: A) A tsunami occurs; B) A segment of the ocean floor is pushed upward; C) Pressure begins building in a subductive zone
A, C, B
C, B, A
B, C, A
B, A ,C
- 3. Multiple Choice
If you were on a boat in the open ocean, why might it be difficult to detect a tsunami?
gravity flattens out the enormous waves caused by undersea earthquakes
tsunamis are caused by the natural cycle of tides
tsunamis occur in seas and lakes, not oceans
boats usually float on large waves
- 4. Multiple Choice
How do tsunami waves compare to regular ocean waves?
they're generally much flatter
they're generally much wider
they extend deeper underneath the water's surface
they contain much more debris
- 5. Multiple Choice
Which choice illustrates the two Japanese words that form the word "tsunami?"
- 6. Multiple Choice
How are tsunami waves like electromagnetic waves?
they are cause primarily by earthquakes
they can usually only travel through water
they can travel long distances and carry lots of energy
they travel along at exactly the speed of sound
- 7. Multiple Choice
Where would you find a subduction zone?
at the boundary between Asia and Europe
in the middle of the ocean, far away from the continents
off the coast of a continent
near the North or South pole
- 8. Multiple Choice
Tsunamis can be detected ahead of time by devices that measure:
the height of ocean waves
the destructiveness of natural disasters
underwater energy
seismic activity
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