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Continental Drift/Seafloor Spreading
Test Description: Review for Continental Drift/Seafloor Spreading quiz
Instructions: Answer all questions to get your test result.
1) The ancient, landmass that contained all of the continents is called _____.
A
Laurasia
B
Pangaea
C
Gondwanda
2) What hypothesis states that continents slowly moved to their present positions on Earth?
A
subduction
B
seafloor spreading
C
continental drift
3) Scientists know that the plates move a few centimeters to a few inches per _____.
A
year
B
10 years
C
100 years
4) Fossils of mesosaurus, an early land-dwelling reptile, have been found in South America and South Africa. The locations of these fossils suggest that these areas were once _____.
A
made of the same chemical elements
B
covered by oceanic crust
C
connected to one another
5) _____ developed the theory of Continental Drift.
A
Harry Hess
B
Albert Einstein
C
Alfred Wegener
6) The presents of the same _____ on several continents supports the idea of Continental Drift.
A
glacial evidence
B
all of the above
C
fossils
D
rocks
7) The thing that Wegener observed was the puzzle-like fit of _____.
A
South America and Africa
B
North America and South America
C
South America and Asia
8) Why did most scientists not believe Wegener's theory?
A
Wegener did not know what caused the similar rock formations.
B
Wegener could not prove the how or why the continents moved.
C
Wegener found fossils of warm plants in warmer climates.
9) Who proposed the theory of Seafloor Spreading?
A
W. Jason Morgan
B
Harry Hess
C
Alfred Wegener
10) Which was a piece of evidence to support the theory of Seafloor Spreading?
A
Older rocks were found at the mid-ocean ridge, while younger rocks were found at subduction zones.
B
The entire seafloor was the same age and type of rock.
C
Younger rocks were found at the mid-ocean ridge, while older rocks were found at subduction zones.
11) Seafloor spreading occurs because _____.
A
earthquakes break apart the ocean floor
B
molten material beneath the seafloor rises to the surface
C
new material is being added to the mantle
12) Bands of rock on the seafloor showing alternating bands of magnetism tells us that Earth's magnetic field _____
A
remained the same
B
reversed itself in the past
C
weakened
*select an answer for all questions
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