Flashcards in Earth Deck (13):
Layers of the earth?
Inner core, Outer core, Mantle, Crust.
The two types of crust?
Continental crust and oceanic crust.
What lies in the mantle?
Molten rock (magma)
What are the earth's main plates?
Eurasian plate, Indo-Australian plate, Antarctic plate, Pacific plate, North American plate, Nazca plate, South American plate and African plate.
What was the original land mass called?
Divergent (constructive plates), Convergent (Destructive plates) and Transform (passive plates).
DC, CD and T.
theory of plates separating
what causes the plates to move?
convection currents within the mantle cause the plates to move.
divergent constructive plates
divergent/constructive plate boundaries are when two plates separate. Magma rises to fill the gap. Volcanoes and mid ocean ridges are formed.
convergent/destructive plate boundaries are when two plates collide.
Volcanoes and fold mountains are formed.
passive/transform plate boundaries are when two plates slide by/push past each other. Earthquakes occur.