Tectonic Plates
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Lithosphere
The earths crust and upper mantle form the rigid outer layer
Divergent Boundry
Plates spread apart (forms new seafloor/rifts)
Convergent Boundry
Plates move together(forms mountains/volcanoes)
Transform Boundry
Plates slide past each other(fault)
What are the fastest seismic waves
Primary Waves
Convection Currents
In the mantle drive plate movement and shape earth’s surface
Where do most earthquakes occur at or near
Plate Boundaries
What is the lithosphere
The rigid outer layer of Earth made of the crust and upper mantle.
What is the asthenosphere?
The soft, partially molten layer beneath the lithosphere that allows plates to move.
Which layer creates Earth’s magnetic field?
The liquid outer core.
Which layer is broken into tectonic plates?
The lithosphere.
What causes tectonic plates to move?
Convection currents in the mantle.
What are convection currents?
The movement of heated material rising and cooler material sinking in the mantle.
What is a plate boundary?
The place where tectonic plates meet.
What happens at a convergent boundary?
Plates move toward each other.
What forms when two continental plates collide?
Mountain ranges.
What forms at an oceanic–continental convergent boundary?
Trenches and volcanoes.
What forms at an oceanic–oceanic convergent boundary?
Trenches and island arcs.
Give an example of a convergent boundary.
The Himalayas.
What happens at a divergent boundary?
Plates move apart.
What forms at divergent boundaries in the ocean?
Mid-ocean ridges.
What forms at divergent boundaries on land?
Rift valleys.
What process happens at mid-ocean ridges?
Seafloor spreading.
What happens at a transform boundary?
Plates slide past each other.