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Sea-Floor Spreading

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Sea-Floor spreading with a bit of Continental Drift

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Questions 10

Answers

1
Where does magma erupt to form new layers?
In trenches
Along edges of continents
Along mid-ocean ridges
At north and South Poles
2
One evidence of Continental Drift is that
Fossils exist on matching areas of different continents
A sea-floor is subducted
Atlantic Ocean is subducted
Pacific Ocean is growing
3
What is the process called when one plate slides under another?
Spreading
Subduction
Convection Current
Oceans
4
What was that one landmass called?
Pangea
Mesosaurus
Panthalassa
Africa
5
Why was Wegeners Theory Rejected?
He used incorrect evidence
He had no fossil evidence
The scientists were afraid of a new idea
He could not tell how the continents moved
6
Alfred Wegener came up with the idea of
Continental Drift
Tsunami
Sea Floor Spreading
Plate Tectonics
7
Who came up with the idea of Sea-Floor Spreading?
Mr. Sowers
Harry Hess
Alfred Wegener
No one
8
What was that idea which stated that continents were once joined to form one super continent?
Sea-Floor Spreading
Plate Tectonics
Continental Drift
Paleomagnetism
9
With sea-floor spreading, the oldest layers will be near the
Coastlines, or away from the mid-ocean ridge
mid-ocean ridge
in the rocky parts of the ocean
10
Scientists notice new things, what's one thing they noticed when viewing the mid-ocean ridge?
Movement of Earths plates
Convection Currents
A convergent Boundary
Magma rising up