AnswersEarth Science Essentials IUnit Test

Unit Test — Unit test Answers

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Which statement describes one of Wegener’s ideas that contributed to the theory of continental drift?

A
The continents drifted apart due to repeated meteor impacts.
B
The continents were once connected as one landmass.
C
The continents have moved apart very quickly due to earthquakes.
D
The continents are magnetically pulled toward or pushed away from one another.
2
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When were Earth’s landmasses first recognizable as the continents we know today?

A
10 million years ago
B
135 million years ago
C
180 million years ago
D
300 million years ago
3

Which type of stress causes rocks to fold?

A
compression
B
shearing
C
strike-slip
D
tension
4

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.
5

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.
6

In which layer of the Earth does the motion of the convection currents drive plate movement?

A
mantle
B
outer core
C
inner core
D
lithosphere
7

Which is one piece of evidence of seafloor spreading?

A
fossil material
B
continent material
C
drilled core samples
D
ocean water samples
8

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.
9

The image shows mountains in Alaska.

Question illustration
A
A syncline is visible.
B
An anticline is visible.
C
These mountains show no evidence of folding.
D
These mountains likely formed from normal faults.
10

Which statement best describes the theory of plate tectonics?

A
Plates sometimes move closer to one another.
B
Sections of Earth that shift are part of Earth’s asthenosphere.
C
Sections of Earth’s continents are in slow, constant movement.
D
Parts of the ocean floor move as they are carried by rift valleys.
11

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
12

The image shows a mountain peak in Asia.

Question illustration
A
compression
B
gravity
C
shearing
D
tension
13

Which indicates how evidence of climate change supports the theory of continental drift?

A
coal fields in several continents
B
volcano formation
C
glacial evidence found in South Africa
D
folded mountains in Africa and South America

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