ES Test 1 Study Guide
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If a deep ocean trench is located adjacent to a continent, active volcanoes would likely be found ____.
Landward from the trench.
Which of the following does NOT occur at a subduction zone?
The leading edges of both plates are bent upward.
The lithospheric plates move an average of ____.
5 centimeters per year.
Which of the following statements is true?
The S-wave shadow zone is larger than the P-wave shadow zone.
Where are most transform faults found?
joining two segments of a mid-ocean ridge
Which region in the Earth consists primarily of solid iron?
region A
The Himalayas in South Asia are an example of what type of plate boundary?
convergent continental-continental boundary
A plate can be made up of ____.
both continental and oceanic lithosphere
If a mechanical wavelet of energy is transmitted through a medium in which it has a higher transmission rate/velocity than passes into one with a lower transmission rate/velocity, the wavelet will _____.
stay on the same path
With increasing distance from a mid-ocean ridge, the age of oceanic crust _______.
increases
All of the earth’s ocean basins are ________.
less than 2 million years old
Why do scientists think that lithosphere has to be destroyed somewhere on or in the earth?
Lithosphere is created at divergent boundaries and the earth is not getting any larger.
Regions of the seafloor with positive magnetic anomalies were formed during times when Earth’s magnetic field ________
had normal polarity
Wegener’s work is a good demonstration of the scientific method because __
his hypothesis did not pass all of the scientific tests to become a theory
Which of the following major discoveries was Not made near or after World War II?
rift valleys in Africa
The lithosphere is the outer layer of the earth characterized by ________.
hard rocks that break
The largest lithospheric plate is the ________.
Pacific Plate
When two plates move together, the lithosphere is ________.
destroyed
A very long-lived magma source located deep in the mantle is called a ________.
hot spot
All of the following are evidence supporting the theory of plate tectonics except for ________.
changes in the Moon’s orbit due to shifting plates
Which ocean formed as a direct result of the breakup of Pangaea?
Atlantic
Deep ocean trenches are surficial evidence for ________.
sinking of oceanic lithosphere into the mantle at a subduction zone
How many plates are present?
3