Section #: 17.1
Drifting Continents
Practice Test
1.
Wegener proposed that the continents were __________.
a.
plowing through oceanic crust
b.
floating on top of oceanic crust
c.
formed at deep ocean trenches
d.
formed at mid-ocean ridges
Hint
2.
What is the name of Alfred Wegener's hypothesis about moving landmasses?
a.
continental movement
b.
plate tectonics
c.
continental drift
d.
seafloor spreading
Hint
3.
The supercontinent from Wegener's theory of continental drift is called __________.
a.
Pangaea
b.
Gondwanaland
c.
Laurasia
d.
North America
Hint
4.
What was one reason that Wegener's hypothesis of continental drift was rejected?
a.
He could not explain what was moving the continents.
b.
He could not support that the continents were once adjacent.
c.
He could not support the idea that climates of certain landmasses had been different .
d.
He could not explain where the continents had moved.
Hint
5.
Which type of information was NOT collected by Wegener to support his continental drift hypothesis?
a.
seafloor magnetic data
b.
rocks
c.
fossils
d.
glacial deposits
Hint
6.
Why did Wegener think that the Antarctic continent had been closer to the equator in the geologic past?
a.
existence of the Transantarctic Mountains
b.
existence of volcanic rocks
c.
evidence of fossil fish
d.
existence of coal beds
Hint
7.
What evidence did Wegener use to estimate the time of Pangaea's break up?
a.
magnetic isochrons
b.
fossil data
c.
ocean-floor topography
d.
coal deposits
Hint
