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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
Gondwanda
C
Pangaea
2) What hypothesis states that continents slowly moved to their present positions on Earth?
A
seafloor spreading
B
continental drift
C
subduction
3) Scientists know that the plates move a few centimeters to a few inches per _____.
A
year
B
100 years
C
10 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
connected to one another
B
covered by oceanic crust
C
made of the same chemical elements
5) _____ developed the theory of Continental Drift.
A
Albert Einstein
B
Harry Hess
C
Alfred Wegener
6) The presents of the same _____ on several continents supports the idea of Continental Drift.
A
all of the above
B
fossils
C
glacial evidence
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 could not prove the how or why the continents moved.
B
Wegener did not know what caused the similar rock formations.
C
Wegener found fossils of warm plants in warmer climates.
9) Who proposed the theory of Seafloor Spreading?
A
W. Jason Morgan
B
Alfred Wegener
C
Harry Hess
10) Which was a piece of evidence to support the theory of Seafloor Spreading?
A
The entire seafloor was the same age and type of rock.
B
Older rocks were found at the mid-ocean ridge, while younger rocks were found at subduction zones.
C
Younger rocks were found at the mid-ocean ridge, while older rocks were found at subduction zones.
11) Seafloor spreading occurs because _____.
A
new material is being added to the mantle
B
earthquakes break apart the ocean floor
C
molten material beneath the seafloor rises to the surface
12) Bands of rock on the seafloor showing alternating bands of magnetism tells us that Earth's magnetic field _____
A
remained the same
B
weakened
C
reversed itself in the past
*select an answer for all questions
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