A seismograph uses a _______ to record the drum's vibrations.
Question 16
16.
The stress force that pulls on the crust where two plates are moving apart is called
_______ .
Question 17
17.
The seismic waves that travel along Earth’s surface and produce the most severe ground
movements are called_______ .
Question 18
18.
The block of rock that lies above a fault is called the_______ .
Question 19
19.
Shearing creates _______faults, like the San Andreas fault in California.
Question 20
20.
_______ seismic stations are required to determine the epicenter of an earthquake?
Question 21
21.
Question 22
22.
Question 23
23.
Question 24
24.
Question 25
25.
Question 26
26.
Distinguish between the focus and the epicenter of an earthquake.
Question 27
27.
Explain in your own words what happens during an earthquake? (Include the words plate boundaries, fault, seismic waves, and scale on which it’s measured).
Question 28
28.
Use the illustration to answer questions 28-30.
Describe the rock layers shown in Diagram A and any forces acting on the rock.
Question 29
29.
Using the above diagram, contrast the plate movements that cause the stresses in Diagrams B and C.
Question 30
30.
Using the above diagram, will a normal fault result from the stresses being applied to the rock unit in Diagram D? Explain.
Question 31
31.
Explain how geologists use seismic waves to locate an earthquake's epicenter.
Question 32
32.
Describe how a seismograph works.
Question 33
33.
Describe the Modified Mercalli Scale. Explain why it is useful.
In a normal fault, the part of the fault that lies below the other part is called the
hanging wall
anticline
footwall
Stress that pushes a mass of rock in two opposite directions is called
shearing
compression
tension
Which type of stress force produces reverse faults?
shearing
compression
tension
Which of the following can cause damage days or months after a large earthquake?
a tsunami
an aftershock
the arrival of surface waves
The point beneath Earth’s surface where rock breaks under stress and triggers an earthquake is called the
focus
epicenter
syncline
In a strike-slip fault, the rocks on either side of the fault slip past each other sideways with little
shaking
up-or-down motion
movement
A fold in rock that bends upward into an arch is called a(n)
anticline
syncline
plateau
The type of seismic waves that arrive at the surface first and move by compressing and expanding the ground like an accordion are called
P waves
S waves
Surface waves
The rating system that estimates the total energy released by an earthquake is called the
Richter scale
moment magnitude scale
Mercalli scale
A large area of flat land elevated high above sea level is called a
syncline
plateau
fault.
The Ring of Fire, where many earthquakes occur, is located around the rim of which ocean?
Atlantic
Pacific
Indian
Which type of seismic wave causes the most destruction to property?
Surface Wave
S Wave
P Wave
Which type of seismic wave can move through solid layers of the earth but not through the liquid outer core?
P Wave
S Wave
Surface Wave
The scale, which is numbered 1-10, that measures the strength or magnitude of an earthquake.
Mercalli Scale
Richter Scale
Hardness Scale
An upward fold in a rock is called a plateau.
True
False
With the range of data available, geologists cannot predict exactly where and when earthquakes will occur.
True
False
The squeezing together of rocks by stress is called shearing.
True
False
In a strike-slip fault, the rocks on either side of the fault slip past each other sideways.
True
False
When an earthquake occurs, S waves are the first seismic waves to arrive at a given location.