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Unit 3 Plate Tectonics Flashcards | StudBud
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Unit 3 Plate Tectonics
Unit 3 Plate Tectonics
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Plate Tectonics, Continental Drift, Sea Floor Spreading
Flashcards
34 cards
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Questions
34
Answers
1
What is a crack in the Earth's crust?
plate
fault
wedgie
suture
2
What primarily determines plate "behavior" when two plates converge?
stress of the plates
tension of plates
density of the plate
magma temperature
3
Crust furthest away from the ridge is younger and ___.
denser
smarter
more magnetic
steeper
4
Earth's plates are in slow, constant motion, driven by convection currents. This is called _?
The Olympic Games
convection currents
Theory of Continental Drift
Theory of Plate Tectonics
5
What land feature is found at location B?
rift valley
trench
mid-ocean ridge
volcano
6
As convection currents move the plates, what processes allow for the renewal of igneous rock?
seismic wave activity
plate tectonics
subduction & melting
continental drift
7
Convection currents cause fluids/liquids to flow when temperature ___, density ___.
temperature increases, density increases
temperature decreases, density stays the same
temperature increases, density decreases
temperature decreases, density decreases
8
What forms when an oceanic plate subducts beneath a continental plate?
mid-ocean ridge
rift valley
trench
fossils
9
What land features do NOT occur due to subduction?
volcanoes
mid-ocean ridges
folded mountains
trenches
10
What was the main reason Wegener’s continental drift hypothesis was
rejected
?
continents didn't really fit together like puzzle pieces
animals could swim to continents that are now separated
fossils were found on Mars
He couldn't provide a mechanism for the continental movement
11
What is the process describes molten material moving through Earth’s mantle?
convection currents
conduction
magma melt
radiation
12
Sea floor spreading and continental drift are believed to be caused by...
magnetic polarity changes
earthquakes
volcanic eruptions
convection currents in mantle
13
What type of plate boundary is found at "X"?
convergent
divergent
convection
tranform
14
Use the image and determine
how many
magnetic reversals have occurred.
3
7
6
8
15
When rocks undergo stress, they ___ or ___.
fault or fold
decay and stick
shift and shimmy
weather and erode
16
What occurs when there is a divergent boundary under
land
?
mountains
rift valley
trench
mid-ocean ridge
17
What land feature is found at location A?
volcano
mid-ocean ridge
rift valley
trench
18
A mid-ocean ridge is evidence of what kind of boundary?
transform
convergent
(no boundary is found here)
divergent
19
The idea that continents slowly move across Earth’s surface was known as _?
Theory of Continental Drift
The Olympic Games
Pangaea
Theory of Plate Tectonics
20
The thermal energy that drives convection currents in the mantle is due to…
magma melt
the rock cycle
radioactive decay
gerbil on exercise wheel
21
What land feature would be created at the plate boundary found at "X"?
volcano
mountain
rift valley
trench
22
Mountains occur mostly where…
trees are planted that grow long roots
two plates collide causing land to fold or rise
two plates separating causing a rift valley
two plates collide forming transform faults
23
What process is occuring at location "Z"?
convection currents
sea floor spreading
subduction
shearing
24
Where do most earthquakes most often occur?
on the edge of continents
at the equator
the furthest location from a mid-ocean ridge
Along the boundaries of the Earth's crustal plates
25
Which is NOT evidence that was used to support the
Theory of Plate Tectonics?
magnetic reversals on the seafloor (seafloor spreading)
deep ocean trenches (subduction at convergent boundaries)
mid-ocean ridges (divergent boundaries)
continents have shapes that match up like puzzle pieces
26
What process is occuring at location "X"?
shearing
convection currents
subduction
sea floor spreading
27
Two oceanic plates are colliding. Which plate will sink beneath the other one?
the denser plate
the youngest plate
the first one to get to boundary
the one with less sediment
28
What kind of stress produces transform boundaries in rock?
strike-slip
shearing
tension
compression
29
What is the type of boundary in the image?
transform
strike-slip
divergent
convergent
30
What occurs when there is a divergent boundary under
oceans
?
rift valley
mountains
deep sea trench
mid-ocean ridge
31
The thermal
energy
that
drives
the movement in the asthenosphere comes from what (layer)?
mantle
crust
outer core
inner core
32
Which processes does NOT take approximately the same amount of time as mountain formation?
creation of a rift valley
creation of a river
creation of a mid-ocean ridge
creation of a volcano
33
What is the type of boundary in the image?
convergent
shearing
divergent
transform
34
Which is NOT evidence that Wegener used to support his
Theory of Continental Drift?
Land forms fit together like puzzle pieces.
Evidence from fossils were found on different continents.
Evidence of magnetic reversals on the sea floor.
evidence of same type rocks found on now separate continents
