Plate Tectonics Flashcards
What is the top layer and how deep
Crust 3 -70km deep
What is the thickest layer and what’s in it
Mantle and there is molten rocks
What does the inner and outer core have in them
Iron and nickel
What is a plate
A plate is when the crust is split up into several large sections called playes
What are the two types of plates
Oceanic and continental
Describe continental plate
Thick plates that carry land masses , they are old and have granite
Describe oceanic
Thinner plates that form ocean floors they are young and have basallt
What is a convection current
Slow mov,ent of molten magma that causes plates to move
What plate boundaries is split apart causing new land give example
Constructive Iceland is a constructive boundary
What is destructive boundary give example
Oceanic plate is forced under continental plate causing it to be destroyed nazca and South American plate are converging
What plate movement is when they slide past each other and exampl
Conservative the San Andreas fault is one
What are fold mountains formed by and an example
A collision boundary where the two continental plates fold upwards the Himalayas are an example
Where do earthquakes usually occur
Pacific ring of fire and the Atlantic ridge
Where are volcanos usually
Edge of continents
How do volcanos erupt
When pressure builds up in the magma chamber and released suddenly
