Continental Drift, Plate Tectonics and Seafloor Spreading
Flashcard
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Science
•
9th - 10th Grade
•
Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
What is Continental Drift?
Back
The theory that continents have moved over geological time and were once joined together in a single landmass.
2.
FLASHCARD QUESTION
Front
What is Plate Tectonics?
Back
The scientific theory that explains the movement of Earth's plates and the processes that occur at their boundaries.
3.
FLASHCARD QUESTION
Front
What is Seafloor Spreading?
Back
The process by which new oceanic crust is formed at mid-ocean ridges and older crust is pushed away.
4.
FLASHCARD QUESTION
Front
What does a Conveyor Belt represent in geology?
Back
It represents the movement of tectonic plates during seafloor spreading.
5.
FLASHCARD QUESTION
Front
What happens during Seafloor Spreading?
Back
New oceanic crust is created as magma rises to the surface at mid-ocean ridges.
6.
FLASHCARD QUESTION
Front
Why was Wegener's theory of Continental Drift initially rejected?
Back
He could not explain HOW the continents moved.
7.
FLASHCARD QUESTION
Front
What is the average density of continental crust?
Back
2.8 g/cm³.
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