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