Tectonic plates(chapter 7) Flashcards
Q
What evidence did Alfred Wegner have to support his Continental Drift theory?
A
1) the continents fit together like a puzzle
2) Fossils were found on different continents thousands of miles apart
Q
Who is Alfred Wegner?
A
The scientist who developed the theory of the continental drift, called Pangea.
Q
What is Pangea?
A
The theory, called continental drift, that all the continents used to be one big super continent, but slowly broke apart after millions of years.
Q
What happened to the Pangea landmass after it broke apart?
A
The super continent slowly broke apart, moving into the continents we know of today.
Q
What is Sea Floor Spreading?
A
The formation of new oceanic crust coming through the Mid Ocean Ridges.
Q
Where does Sea Floor spreading occur?
A
At Mid Ocean Ridges
Q
What evidence supports Sea Floor spreading?
A
Eruptions of Molten material
Q
How do tectonic plates move?
A
Convection currents
Q
What happens at convergent boundaries?
A
Two plates come together.
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Q
What happens at divergent boundaries?
A
Two plates move apart from each other.
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Q
What happens at transform boundaries?
A
The plates move in two different directions while pressing against each other.
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