Flashcards
Restless earth- tectonic activity
Cards in this deck (14)
- 1What is an ocean trench?A long, narrow deep gash formed under the ocean
- 2Why are contrastive plate margins given that name?When the two plates are moving away from each other, new crust is formed
- 3Why are destructive plate margins given that name?Oceanic crust is being destroyed
- 4What happens at a collision plate margin?The two plates are moving towards one another, neither plate is being subducted because both plates carry continental crust. Fold mountains are formed
- 5What occurs at a conservative plate margin and why?Earthquakes. because the two plates try to move past each other, but sometimes get stuck and energy builds up until they suddenly jolt free causing a violent earthquake.
- 6What is the ring of fire?A ring surrounding the Pacific Ocean where earthquakes occur on the edge
- 7Name the structure of the earth (start from the middle(Inner core, outer core, Mantle, Crust
- 8Name two types of crust?Continental crust and oceanic crust
- 9Name two differences between oceanic and continental crust?Continental crust is thicker than oceanic crust AND it's made of granite, oceanic crust is made from basalt
- 10What are tectonic plates?Are large cracks in the earths surface
- 11What causes plates to move?Convection currents in the mantle
- 12What are plates made up of?Lithosphere
- 13Name the 4 different types of plate margins?Destructive, constructive, conservative, collision
- 14What happens at a destructive plate margin?The two plates are pushed or subducted beneath the other, and magma is forced up to the surface
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- GCSE Physical Geography Flashcards on Restless earth- tectonic activity, created by taylor2em on 03/06/2013.
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- taylor2em
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