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Plate Tectonics Flashcards | StudBud
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Plate Tectonics
Plate Tectonics
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1
Sea floor spreading is a....
Process
Feature
2
Earthquakes and volcanoes happen why?
drilling for oil
plates meet and bump against each other
3
Smart people think the movement of Earths plates happens where and how?
convection currents in the mantle
convection currents in the crust
convection currents in the core
4
What do these prove: fossils, folded mountains, glacier scratches, fit of continents
theory of gravity
continental drift theory
convection currents in mantle
5
Where do smart people think convection currents flow?
'merica
Mantle
Crust
Core
6
Which is denser..oceanic or continental crust?
oceanic
continental
7
How do we know the rocks far away from mid ocean ridges are older than the ones near it?
the rocks aren't as weathered
they have eroded a lot
drilling for rock samples
8
What is Pangea?
all you can eat buffet in Buford
a nasty skin infectino
supercontinent-one landmass
9
Generally, what does "divergent" mean?
pulling apart
coming together
neither
10
The idea that the lithosphere is in constant motion is called what?
Plate Tetonics
Subduction
Pangea
11
Why did most people reject our old friend Wegener and his ideas?
He was too noisy in libraries
He couldn't explain why plates moved
He had poor taste in music
12
Generally, what does "convergent" mean?
pulling apart
neither
coming together
13
What is formed at divergent plate boundaries in the ocean?
pangea
mid ocean ridge
subduction zones
14
Where does a rift valley form?
At a transform boundary
At a convergent boundary
At a divergent boundary
15
When ocean floor sinks beneath a trench and back to the mantle...what is that?
subduction zone
convection current
conveyor belt