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- 1. Multiple Choice
What do you call the device used to detect underwater objects?
sonar
seismograph
ultrasound
infrasound
- 2. Multiple Choice
What is it called where chains of mountains rise up to form the ocean floor?
Mid-Ocean Ridge
Subduction
Deep-Ocean Trench
Sea-Floor Spreading
Magnetic Striping
- 3. Multiple Choice
What is it called when the ocean floor sinks beneath a deep-ocean trench?
Mid-Ocean Ridge
Deep-Ocean Trench
Sea-Floor Spreading
Subduction
Magnetic Striping
- 4. Multiple Choice
A place in the ocean where the oceanic crust bends downward is known as a _____________.
Mid-Ocean Ridge
Subduction
Deep-Ocean Trench
Sea-Floor Spreading
Magnetic Striping
- 5. Multiple Choice
Which of the following evidences does not support the sea floor spreading theory?
strange pillow shaped rocks formed from cooled molten material
ocean rocks organized in magnetized stripes
the further the rocks are from the ridge the older they are
underwater volcanoes
- 6. Multiple Choice
Which scientist proposed the theory of sea-floor spreading?
Isaac Newton
Rube Goldberg
Alfred Wegener
Harry Hess
- 7. Multiple Choice
Where does sea-floor spreading occur?
mantle
mid-ocean ridges
subduction zones
deep-ocean trenches
- 8. Multiple Choice
Where does subduction occur?
mantle
deep-ocean trench
rift valley
mid-ocean ridge
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