What is the lithosphere?

Tectonic Plates

Flashcard
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Science
•
4th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The lithosphere is the rigid outer layer of the Earth, consisting of the crust and the upper part of the mantle, which is divided into tectonic plates.
2.
FLASHCARD QUESTION
Front
What is the asthenosphere?
Back
The asthenosphere is the semi-fluid layer of the mantle beneath the lithosphere that allows tectonic plates to move.
3.
FLASHCARD QUESTION
Front
What happens at divergent boundaries?
Back
At divergent boundaries, tectonic plates move away from each other, leading to the formation of new crust, often seen at mid-ocean ridges.
4.
FLASHCARD QUESTION
Front
What happens at convergent boundaries?
Back
At convergent boundaries, tectonic plates move toward each other, which can cause one plate to be forced beneath another, leading to subduction.
5.
FLASHCARD QUESTION
Front
What is a transform boundary?
Back
A transform boundary is where two tectonic plates slide past each other horizontally, often causing earthquakes.
6.
FLASHCARD QUESTION
Front
What is sea-floor spreading?
Back
Sea-floor spreading is the process by which new oceanic crust is created at mid-ocean ridges as tectonic plates pull apart.
7.
FLASHCARD QUESTION
Front
What is the youngest crust in the ocean?
Back
The youngest crust in the ocean is found at mid-ocean ridges, where new crust is formed.
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