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Plate Tectonics
Plate Tectonics
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Plate Tectonic review for the test #9thgradeearthscience
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
At which plate boundaries do Earthquakes occur?
Divergent
Transform
Convergent
All boundaries
2
The grey stripes are are show a normal magnetic pattern, what do the white stripes represent?
normal magnetism in granite crust
normal magnetism in basalt crust
magnetic reversals in basalt crust
magnetic reversals in granite crust
3
Which type of plate boundaries grind past each other?
divergent
convergent
transform
all boundaries
4
At which type of plate boundary does seafloor spreading happen?
all boundaries
convergent
transform
divergent
5
Why do the plates move?
Convection currents in the mantle
Radiation from the sun
Subduction of the crust
Convection currents in the crust
6
Why wasn't Alfred Wegener's theory of continental drift accepted in his time?
He couldn't explain how the plates moved
He didn't have any evidence
He based his ideas off of bad science
He didn't know how to conduct a good experiment
7
What happens to the sea floor as you move away from the mid-ocean ridge?
Nothing
It gets more magnetic
It gets older
It gets younger
8
Who discovered sea floor spreading?
Alfred Wegener
Harry Hess
Bill Nye
Bill Gates
9
Which type of boundary is shown in the picture?
Oceanic-oceanic
Oceanic-Continental
Divergent
Continental-continental
10
What evidence did Harry Hess add to our current theory of plate tectonics?
continents fitting together like a puzzle
fossils found on distant continents
mountain ranges continue on distant continents
sea-floor spreading
11
At which plate boundaries do subduction zones occur?
transform
divergent
convergent
12
Where do rift valleys form?
at convergent plate boundaries
at subduction zones
at divergent plate boundaries
at transform plate boundaries
13
What is it called when one plate gets pulled underneath another plate?
Seclusion
Subduction
Seduction
Sinkification
14
The Pacific ring of fire is where plates are _____
converging
diverging
not moving
scraping past each other
15
Which type of plate boundary is shown in the picture?
Convergent
Divergent
Transform
16
Which plate boundaries have BOTH volcanoes and earthquakes there?
Convergent
Transform
Divergent and convergent
Divergent
17
Where could you go to walk between two plates?
Iceland
California
Alaska
Washington
18
In the picture, which way will the plates move because of convection?
Up
Down
Toward each other
Away from each other
19
Which type of plate boundaries form ocean trenches?
All boundaries
Transform
Convergent
Divergent
20
Which type of boundary produces a volcanic arc island?
divergent
continental-continental convergent
oceanic-continental convergent
oceanic-oceanic convergent
21
Which type of boundaries produce the greatest number of earthquakes?
convergent
divergent
transform
22
True or false: Earth's magnetic field has gone through many reversals over time
True
False
23
How did scientists find the mid-Atlantic ridge?
Sonar- when they were mapping the seafloor
Boats- while they were deep sea diving
Satellites- when they were mapping earth
Radar- when they were studying the atmosphere
24
Who proposed the theory of continental drift?
Harry Hess
George Lucas
Alfred Wegener
Bill Nye
25
At which plate boundaries do volcanoes occur?
Transform
Divergent
Both divergent and convergent
Convergent
