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3.2 Sea Floor Spreading Flashcards | StudBud
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3.2 Sea Floor Spreading
3.2 Sea Floor Spreading
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Questions
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Answers
1
Molten material erupts
inside
the central valley of mid-ocean ridges. True or False?
False
True
2
Which features form the longest mountain ranges on Earth?
mid-ocean ridges
the Rockies
deep-ocean trenches
the Andes
3
Where does subduction occur?
along the middle of some ocean floors
at deep-ocean trenches
down the middle of mountain ranges
on continents
4
Which process adds more crust to the ocean floor?
magnetic stripe
subduction
sea-floor spreading
suction
5
The pattern of magnetic stripes in rocks on either side of a mid-ocean ridge is
the same
False
True
6
Sea-floor spreading occurs at
mid-ocean ridges
. True or False?
True
False
7
The farther from a mid-ocean ridge a rock sample is taken, the
younger
the rock is.
False
True
8
Which process or processes change the size and shape of the oceans?
sea-floor spreading only
both subduction and sea-floor spreading
both drilling for samples and subduction
subduction only
9
Sonar
is a device that scientists use to map the ocean floor. True or False?
True
False
10
A deep-ocean trench is an underwater
mountain
. True or False?
False
True
