What is seafloor spreading?
Seafloor Spreading

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Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Seafloor spreading is the process by which new oceanic crust is formed at mid-ocean ridges as tectonic plates move apart.
2.
FLASHCARD QUESTION
Front
What is the role of convection currents in plate tectonics?
Back
Convection currents in the Earth's mantle drive the movement of tectonic plates, causing them to diverge, converge, or slide past each other.
3.
FLASHCARD QUESTION
Front
What is subduction?
Back
Subduction is the process where one tectonic plate sinks beneath another, often leading to volcanic activity and the formation of mountain ranges.
4.
FLASHCARD QUESTION
Front
What is continental drift?
Back
Continental drift is the hypothesis that continents have moved over geological time and were once joined together in a single landmass.
5.
FLASHCARD QUESTION
Front
What is a mid-ocean ridge?
Back
A mid-ocean ridge is an underwater mountain range formed by the upwelling of magma at divergent tectonic plate boundaries.
6.
FLASHCARD QUESTION
Front
What happens when oceanic and continental plates collide?
Back
When oceanic and continental plates collide, the denser oceanic plate typically sinks beneath the continental plate, leading to subduction.
7.
FLASHCARD QUESTION
Front
What is the average density of continental crust?
Back
The average density of continental crust is approximately 2.8 g/cm³.
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