Studied by 32 peopleContinental Crust
Continental crusts are thicker older and lighter than Oceanic crusts. They are mainly made of granite.
Oceanic Crust
Oceanic crusts are younger and heavier than Continental crusts mainly made of basalt and gabbro.
Convergent/Destructive boundaries
An area on earth in which two or more lithospheric plates collide. Eventually, one plate slides under the other in a process called subduction.
Collision boundaries
If two continental plates collide, neither can sink and so the land buckles up to form mountains.
Transform/Conservative boundaries
They occur when plates slide past each other in opposite directions but without creating or destroying litosphere.
Constructive/Divergent boundaries
The plates are moving apart from one another. When this happens, the magma from the mantle rises up to make a new crust.
Hotspots
A hotspot is a large plume of hot mantle rising from deep within the Earth. A line of volcanoes develops as a plate moves over a hotspot.
What are the 4 Primary hazards?
Lava Flow, Pyroclastic Flow, Ash Fall, Gas Erruption
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