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Continental Drift/ Seafloor Spreading/ Plate Tectonics Flashcards | StudBud
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Continental Drift/ Seafloor Spreading/ Plate Tectonics
Continental Drift/ Seafloor Spreading/ Plate Tectonics
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Used for review in Earth Science before a test on Plate Tectonics.
Flashcards
33 cards
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Questions
33
Answers
1
Plate tectonics is considered to be a scientific theory because it
explains many observations supported by much evidence.
is an educated guess about a question.
has been proven and will not change.
is based on personal belief or opinions.
2
The Mediterranean Sea is located between the African and Eurasian Plates. In the far future,
the sea will become an ocean.
the sea will move to the west.
no changes will occur to the sea.
the sea will subduct beneath the Eurasian plate.
3
The mid ocean ridge is which one of the following?
Convergent Boundary
Transform Boundary
Divergent Boundary
4
What type of boundary is it when an oceanic plate meets a continental plate?
Divergent
Insurgent
Convergent
Transform
5
Which one of the following is
not
evidence for seafloor spreading?
Magnetic Pattern
Glacial scratches
Age of the Rocks
Pillow lava
6
Heat transfer by direct contact is called...
Convection
Conduction
Radiation
7
The Pacific Ocean is _______ due to _________
Contracting due to divergent plate boundaries.
Expanding due to subduction zones.
Expanding due to convergent plate boundaries.
Contracting due to subduction zones.
8
Which scientist proposed that the ocean floor was expanding around mid ocean ridges?
Alfred Neuman
Harry Hess
Albert Einstein
Alfred Wegener
9
Which one of the following is not true of Harry Hess?
Scientist
All true
Harvard Professor
Navy Officer
10
What happens to a convection current when the heat source is removed?
change direction
speed up
continue forever
eventually stop
11
How did ancient sea shell fossils get into the Himalayan Mountains?
strong winds
birds dropped shells
sea level was much higher
India crashed into Eurasia
12
What type of plate boundary is shown?
Transform
Divergent
Convergent
13
Which one of the following is
not
evidence proposed by Wegener for a one time supercontinent?
Magnetism
Glacier Scratches
Mountain Ranges
Fossils
14
Magma that turns into rock at the mid ocean ridge, has iron particles that record
Earth's gravity
Earth's magnetism
Earth's cosmic rays
Earth's history
15
Weathering, erosion, and deposition
are not an important geological process.
change the shape of land masses.
occur in the asthenosphere.
are constructive forces that build mountains.
16
What feature is usually found over subduction zones?
Volcanoes
All of these
Earthquakes
Mountain Ranges
17
A divergent plate boundary is located in part of continental Africa.
Basalt magma is breaking through the crust.
A rift valley is forming.
All of these things are happening.
Volcanic mountains are forming.
18
What is it called when oceanic crust goes down into the mantle under the continental crust?
superposition
divergent boundary
subduction zone
sublimation
19
Apparently, the earth's magnetic poles have reversed in the past.
False
True
20
What technology was used to map the topography of the ocean floors?
Sonar
Radar
Magnetometers
Infrared telescopes
21
What is the primary method of heat transfer in the asthenosphere?
Conduction
Radiation
Convection
22
What type of plate boundary is shown?
Transform
Divergent
Convergent
23
The presence of coal (made from plants) in Antarctica means that this continent must have
changed climate
moved over time
all of these
had tropical weather
24
What force is cited as the driving force that moves the oceanic plates?
Earthquakes
Convection Currents
Ocean Currents
Volcanoes
25
Alfred Wegener's hypothesis was rejected by his peers because
his fossil and climate evidence was weak.
he had no mechanism/force that could move continents.
they still believed the "wrinkled apple" idea for mountains.
drilling samples on the ocean floor were useless.
26
What technology allows geologists to infer the structure inside Earth (crust, mantle, core)?
Radar
Seismic waves from earthquakes
Drilling samples
Sonar
27
Why does Earth have a magnetic field?
Convection in the outer core causes the inner core to spin
Convection in the asthenosphere moves the lithosphere
Due to the magnetic stripes on the seafloor
Scientists do not have a good hypothesis for this phenomenon
28
How does heat energy cause fluids to rise?
molecules move faster, volume increases, density decreases
molecules move faster so mass and density decrease
molecules move faster so volume and density increase
molecules move slower and the fluid contracts
29
Which direction is the Nazca Plate moving?
north
south
west
east
30
What is the name of the most recent supercontinent when all the continents were connected?
Gondwana
Laurasia
Pangaea
Panama
31
Which one of the following is not in the mid ocean ridge?
Volcanic activity
Ocean Trench
New Rock
32
Glossopteris (fern-like tropical plant) fossils found in Antarctica are:
All of the choices are correct.
one of Wegener's lines of evidence for continental drift.
evidence that Antarctica was once warmer.
evidence that Antarctica was once closer to the equator.
33
Oceanic crust is ...
primarily made of granite.
is recycled less often than continental crust.
older and colder near mid-ocean ridges.
thinner and more dense than continental crust.
