
Geology Flashcard
Flashcard
•
Science
•
12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is sea-floor spreading?
Back
Sea-floor spreading is the process by which new oceanic crust is formed at mid-ocean ridges and gradually moves away from the ridge, causing the ocean floor to expand.
2.
FLASHCARD QUESTION
Front
Where are the youngest rocks in the ocean floor found?
Back
The youngest rocks in the ocean floor are found near mid-ocean ridges.
3.
FLASHCARD QUESTION
Front
What was a major reason Wegener's hypothesis of continental drift was rejected?
Back
Wegener could not explain how the continents could move through the ocean floor.
4.
FLASHCARD QUESTION
Front
What method do scientists use to determine the structure of Earth's interior?
Back
Scientists use seismic waves to determine what Earth's interior looks like.
5.
FLASHCARD QUESTION
Front
What drives mantle convection?
Back
Mantle convection is driven by the heat from the cooling of Earth's interior and the decay of radioactive isotopes.
6.
FLASHCARD QUESTION
Front
What are P waves?
Back
P waves are primary waves that cause Earth to vibrate in the direction of the wave's motion.
7.
FLASHCARD QUESTION
Front
What are S waves?
Back
S waves are secondary waves that cause Earth to vibrate at right angles to the direction the wave moves.
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