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EA1110: Plate tectonics and magma generation 2020 Flashcards | StudBud

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EA1110: Plate tectonics and magma generation 2020

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Questions 8

Answers

1
What is true about the continental crust (CC) and oceanic crust (OC)?
OC is granitic
CC is basaltic
OC is thicker than CC
OC is denser than CC
2
Which is NOT a feature of a convergent boundary?
Volcanic arcs
Mountain building
Subduction
Hot spots
3
How is a hot-spot track produced?
Flux melting
Stationary tectonic plates
Decompression melting in the mantle
Ocean-Ocean collision
4
Which is NOT a characteristic of continental rifting?
Oceans closing
Divergent plate boundaries
Separating continents
Large scale volcanism
5
Why is subduction necessary on a non-expanding Earth?
So crust is destroyed to make new crust
To limit the height of mountains
To destroy those pesky animals
So the oceans are not too deep
6
Which is NOT a type of plate boundary?
Convergent
Divergent
Deform
Transform
7
Which is NOT a continental collision characteristic?
Mountain building
Convergent plate boundaries
Oceans opening
Melting by radioactive elements
8
Which is NOT a lithosphere characteristic?
Brittle
Ductile
Solid rock
Floats on the mantle