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WorksheetsContinental Drift and Seafloor Spreading
Total questions: 11
Worksheet time: 6mins
Name
Class
Date
1.
What is seafloor spreading?
a)
When magma erupts from mid-ocean ridges and creates new oceanic crust
b)
When magma erupts from deep ocean trenches and creates new oceanic crust
c)
When ice cream erupts from mid-ocean ridges and creates new oceanic crust
d)
When the seafloor spreads apart
2.
What are three pieces of evidence that support seafloor spreading?
a)
Ocean material, zebra stripes, drilling samples
b)
Terrain features, fossils, climate
c)
Ocean material, magnetic stripes, drilling samples
d)
Ocean material, magnetic stripes, fossil samples
3.
True or False: Most scientists did not accept Wegener's theory of continental drift.
a)
True
b)
False
4.
What is Glossopteris?
a)
A fernlike plant that wasn't found on many major land masses that had broken apart
b)
A fernlike plant that was found on many major land masses that had broken apart
c)
Gloss on pottery
d)
A treelike plant that was found on many major land masses that had broken apart
5.
What was Pangaea?
a)
A supercontinent that existed about 250 million years ago
b)
Wegener's breakfast
c)
A supercontinent that existed about 350 million years ago
d)
A supercontinent that existed about 300 million years ago
6.
What is a fossil?
a)
Any trace of an ancient organism that has been preserved in rock
b)
Any trace of a recent organism that has been preserved in rock
c)
Any piece of rock
d)
Dead things
7.
True or False: Fossils of tropical plants were found on an island in the Arctic Ocean.
a)
True
b)
False
8.
True or False: Sonar wasn't used to map mid-ocean ridges.
a)
True
b)
False
9.
What are mid-ocean ridges?
a)
Ridges in the middle of the ocean
b)
Mountain ranges at which seafloor spreading may or may not occur
c)
Seafloor spreading
d)
Underwater mountain ranges at which seafloor spreading occurs
10.
What is subduction?
a)
A process in which oceanic crust is recycled into the mantle through deep ocean trenches
b)
A process in which continental crust is recycled into the mantle through deep ocean trenches
c)
Subterranean duct tape
d)
A process in which oceanic crust is created at mid-ocean ridges
11.
True or False: An ocean with many trenches will shrink, and an ocean with many ridges will shrink
a)
True
b)
False
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