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