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PLATE TECTONICS Flashcards | StudBud
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PLATE TECTONICS
PLATE TECTONICS
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#platetectonics, #continentaldrift, #thetheoryofplatetectonics
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1
Where is the oldest oceanic crust found?
nearest the mid-ocean ridge
in the middle of the plate
nearest the subduction zone
in the shallowest part of the ocean
2
Most of the planet's volcanism occurs
toward the interior of lithospheric plates.
within mountain ranges.
along continental margins.
along mid-ocean ridges.
3
Continental drift was not widely accepted when it was first proposed because
why and how the continents moved could not be explained.
magnetic and sonar data suggested that it was incorrect.
mantle convection currents weren’t active until recently.
continents were too big to move slowly over Earth’s surface.
4
Which of the following is a plate boundary where two plates slide past each other?
volcanic
transform fault
divergent
convergent
5
The layer of the Earth located just beneath the crust is called the
outer core
lithosphere
inner core
mantle
6
Ocean plates are __________ than continental plates.
less dense
more dense
lighter
thicker
7
Who began the theory of plate tectonics with his theory called continental drift?
Isaac Newton
Copernicus
Alfred Wegener
Edwin Hubble
8
The San Andreas Fault is a
convergent boundary
subduction zone
divergent boundary
transform fault boundary
9
What are tectonic plates?
slabs of crust and upper mantle
mantle material
slabs of oceanic crust
slabs of continental crust
10
Which of the following forms when an oceanic plate collides with a continental plate?
subduction zone
a rift zone
magnetic reversal
an island
11
How do temperature and pressure change with depth in the Earth’s crust?
they remain the same
temperature increases but pressure decreases
they increase
they decrease
12
Where are most divergent boundaries found?
within mountain ranges
continental margins
at subduction zones
mid-ocean ridges
13
Magma’s cycle of heating, rising, cooling, and sinking is called a _____________.
transform fault
convergent boundary
subduction zone
convection current
14
What clue supported the continental drift theory?
Hydrothermal vents in the deep ocean
like fossils found on continents separated by oceans
Navy sonar
Spreading at mid-ocean ridges
15
How does the flow of lava that has a low viscosity compare to lava with a high viscosity?
it's more explosive
it moves slower
it moves at the same speed
it moves faster
16
The existence of coal deposits in Antarctica indicates that the continent was once
part of Africa
swampy with dense vegetation
cold & dry
far from the equator
17
What evidence proved that S. America, Africa, India, and Australia were once glacial?
their cold climates
leftover portions of glaciers
glacial deposits and the scarring of rock surfaces
enormous valleys formed by glaciers
18
When oceanic crust collides with continental, all of the following can happen -
except
?
There is a subduction zone
There is a transform boundary.
There are mountains formed
Crust is recycled
19
What do we call boundaries along which plates are moving apart?
convergent
divergent
transform fault
convection current
20
Earth's crust is destroyed and recycled
at subduction zones
at mid-ocean ridges
at continental margins
within mountain ranges
21
Convection currents in the Mantle cause cooler, denser material to;
rise to the top of the asthenosphere
sink deeper into the mantle
form into solid rock
become lava
22
A mountain range, like the Himalayas, are forming as a result of
continental - oceanic convergence
continental - continental convergence
none of the other choices is correct
oceanic - oceanic convergence
23
What do scientists believe is the force behind the plate tectonics theory?
gravity slab pull
the movement of the planets
the Sun's gravity
convection currents
24
The Eurasian and North American Plates form what boundary?
divergent
transform fault
lithosphere
convergent
25
Where is new oceanic crust formed?
subduction zone
transform fault boundary
the asthenosphere
mid - ocean ridge
26
What is the difference between lava and magma?
They originate from different places
They are different colors
After magma reaches Earth’s surface it is called lava
They are made of different types of rock
