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Plate Tectonics Review Flashcards | StudBud
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Plate Tectonics Review
Plate Tectonics Review
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1
A tropical plant fossil was found on an island in the Arctic.This is used as evidence for what?
The theory of plate tectonics.
continental drift changed the climate.
A supercontinent once existed.
Sea-floor spreading.
2
Which theory states that pieces of the Earth's lithosphere are in continuous, slow motion?
plate tectonic theory
Pangea theory
continental drift theory
lithosphere movement theory
3
Oceanic crust near the mid-ocean ridge...
more wet than crust further from the ridge.
is not different from crust further from the ridge.
contains more fossils than crust further from the ridge.
younger than crust further from the ridge.
4
Plates that come together are called a _______ boundary.
transform
subduction
convergent
divergent
5
What is a rift valley?
A deep valley on the continental crust.
A deep underwater canyon.
A mountain chain that rises up from the ocean floor.
A mountain range on the continental crust.
6
Plates slip past each other along a _______ boundary.
subduction
divergent
convergent
transform
7
Which type of crust is more dense, oceanic crust or continental crust?
Continental Crust
Oceanic Crust
8
What do scientists believe causes the movement of the Earth's plates?
sea-floor spreading
seismic action
Earth's magnetic field
convection currents in the mantle
9
Sea-floor spreading happens when molten material rises __________________.
in the deep-ocean trenches
along mid-ocean ridges
from volcanoes on the continental crust
at the boundary of each plate
10
What do you call it when the ocean floor sinks beneath a deep-ocean trench into the mantle?
divergent
transform
subduction
convergent
11
What is any trace of an ancient organism that has been preserved in a rock called?
Pangea
fossil
rift
continent
12
What is the idea that the continents slowly moved over the Earth's surface in the past?
divergent boundaries
plate tectonics
continental drift
supercontinental drift theory
13
Earth's crust is divided into two types
oceanic crust and continental crust
land crust and sea crust
continental and continental crust
14
What is the rising of warm magma and the sinking of cooler magma inside the mantle known as?
plate tectonics
a convergent boundary
convection currents
conduction
15
What did Wegener name the supercontinent he described?
Pangea
Palermo
Pangrava
Panini
16
Convection currents in the mantle are caused by differences in what?
Temperature and Density
Composition
Mass
Size
17
What is the name of the freshwater reptile that Wegener used as evidence for his hypothesis?
Glacialsaurus
Mesosaurus
Spitsbergen
Glossopteris
18
What device used sound waves to help map the mid-ocean ridges in the mid- 1900s?
sonar
seismograph
laser
ridgeometer
19
What happens when a continental plate and an oceanic plate collide?
they squeeze the crust upward forming a mountain
one slides under the other forming a trench
Each of these could happen
the oceanic plate slides under the continental plate
20
The thinnest layer of the Earth is ....
Outer Core
Mantle
Inner Core
Crust
21
What do you call the process where new material is continually added to the ocean floor?
mountain range
deep-ocean trench
mid-ocean ridge
sea-floor spreading
22
According to the plate tectonic theory, what drives the movement of the plates?
converging and diverging boundaries
the Earth's magnetic field
convection currents in the mantle
sea-floor spreading
23
Why did most geologists of Wegener's time reject his hypothesis?
He had no evidence to support his hypothesis.
They did not like Wegener.
He couldn't explain the fossil records.
He couldn't explain what caused the continents to drift.
24
When two pieces of continental crust collide at a converging boundary, a ______ is produced.
rift valley
mid-ocean ridge
mountain range
convergent boundary
25
What happens when two continental plates collide?
the crust is squeezed upward into a mountain
the oceanic plate slides beneath the continental plate
one slides under the other and forms a trench
each of these could happen
26
What is a difference between old and new oceanic crust?
newer crust has magnetic striping
older crust is found under the continents
nothing
older crust is cooler and more dense
27
Plates move apart from each other at a _________ boundary.
subduction
convergent
divergent
transform
28
What was Alfred Wegener's hypothesis about the continents.
Mountain ranges formed when continental plates collided.
There have always been 7 distinct continents.
The continents were joined together and then drifted apart
The continents rest on plates that move slowly over time.
29
Alfred Wegener supported his continental drift theory using evidence from...
fossil records and ocean floor mapping
landforms, fossils, and climate
Marie Tharp's mapping the ocean floor using sonar
landforms, fossils, and sea-floor spreading
30
What do you call a long chain of mountains that rise from the ocean floor?
deep-ocean trench
mid-ocean ridge
sea-floor spreading
mountain range
31
Which statement describes pillow lava?
They are evidence of a young ocean floor.
Their formation happens during sea-floor spreading.
They form when molten material hardens quickly under water.
All of these are true
32
What do you call it when the oceanic crust bends downward?
deep-ocean trench
mid-ocean ridge
mountain range
sea-floor spreading
33
The pattern of magnetic stripes on rocks is evidence for _______________.
Pangea (a supercontinent)
convection currents
sea-floor spreading
continental drift
34
What happens when two oceanic plates collide?
one bends under the other and causes a trench
they squeeze the crust upward into a mountain range
all options are possible
the oceanic plate slides beneath the continental plate
35
Tectonic plates are located on the
core
middle mantle
lithosphere
Earth
