Page 96 - Science Course 2 (Book 2)
P. 96
Mo10-L3b: Why Tectonic Plates Move?
A boundary where two plates move away from each Two plates slide past each other at a transform
other is called a divergent boundary. boundary.
As plates at a divergent boundary move apart, new
crust forms between them.
PLATE
PLATE Asthenosphere
Subduction is the process that occurs when one
Asthenosphere tectonic plate moves under another tectonic plate.
A boundary where two plates move toward each
other is a convergent boundary.
In some convergent boundary locations, one plate
is pushed under the other plate and down into the
mantle where it melts and becomes part of the
mantle.
Key Concept
Why Tectonic Plates Move?
PLATE convergent, and transform plate boundaries?
What are the differences between divergent,
Asthenosphere
Measuring Plate Movement
Tectonic plates move horizontally over Earth’s surface.
During the 1970s, scientists and engineers developed new technologies that enabled them to measure how
fast tectonic plates move.
The position of any point on Earth’s surface can be accurately measured using the network of satellites known
as the Global Positioning System (GPS).
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