Unit Test — Unit test Answers

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21
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Which statement describes seismic waves?

A
They carry energy.
B
They move in one direction.
C
They originate from the epicenter.
D
They only vibrate at Earth’s surface.
22
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The image shows the Great Rift Valley in Africa, an example of a rift valley.

Question illustration
A
The rift valley formed when the crust pulled apart.
B
The rift valley formed due to subduction.
C
The rift valley formed similarly to an island arc.
D
The rift valley formed at a convergent boundary.
23

Which is one step that geologists use to find the epicenter of an earthquake?

A
They look at data from at least one seismograph.
B
They measure the difference between arrival of P waves and S waves.
C
They draw circles around the epicenter from three locations.
D
They obtain information about the intensity of earthquakes from seismographs.
24

Which correctly lists three features that are parts of the topography of an area?

A
elevation, people, and relief
B
landforms, elevation, and weather
C
people, landforms, and relief
D
relief, elevation, and landforms
25

Which statement describes transform boundaries?

A
Rift valleys are formed.
B
Mountains are created.
C
Faults form in the lithosphere.
D
Plates move toward each other.
26

Sophia was studying with Maalik about the layers of the Earth. They were given several different statements about the layers.Which statement about the layers would they identify as correct?

A
The outer core is less than 70 km in thickness.
B
The crust assists in forming Earth’s magnetic field.
C
The mantle is denser than the crust.
D
Pressure increases when moving from the core to the crust.
27

Which is one piece of evidence of seafloor spreading?

A
fossil material
B
continent material
C
drilled core samples
D
ocean water samples
28

Which statement describes one event that happens at deep-ocean trenches?

A
Crust is formed.
B
Mountains are formed.
C
Seafloor spreading occurs.
D
Denser plates slide under lighter plates.
30

Which feature of Earth is created at mid-ocean ridges?

A
new island chain
B
new underwater caves
C
new continents
D
new ocean floor
32

Which type of stress causes rocks to fold?

A
compression
B
shearing
C
strike-slip
D
tension
33

Which feature is most likely found at a divergent boundary?

A
fold
B
plateau
C
fault-block mountain
D
anticline or syncline
34

Where does shearing often occur?

A
along a normal fault
B
along a reverse fault
C
at a transform boundary
D
at a divergent boundary
35

During the process of mountain building, earthquakes sometimes occur along continental-continental convergent boundaries. Which statement best describes the motion of the plates along these boundaries that causes the earthquakes?

A
The plates push apart from each other with no subduction.
B
Subduction occurs with the less-dense plate sinking below the other plate.
C
Subduction occurs with the more-dense plate sinking below the other plate.
D
The plates smash together with no subduction.

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