Stress that pushes a mass of rock in two opposite directions is called _______. a. shearing b. tension c. compression
What is a. shearing?
100
The point beneath Earth’s surface where rock breaks under stress and triggers an earthquake is called the
a. syncline. b. footwall. c. focus.
What is c. focus.
100
What does a seismograph do? a. records seismic waves b. records P waves c. records S waves
What is A. records seismic waves
100
With the range of data available, geologists CANNOT predict exactly where and when earthquakes will occur.
What is true.
100
A seismograph uses a _______________ to record the drum’s vibrations.
What is a pen.
200
Which type of stress force produces reverse faults? a. shearing b. tension c. compression
What is a c. compression
200
When an earthquake occurs, seismic waves travel ___________. a. only through a hanging wall b. only through the footwall c. outward from the focus
What is c. outward from the focus
200
Where are the areas that are at great risk from earthquakes? a. in the center of the plates b. where the plates meet c. om the middle of the ocean
What is b. where the plates meet
200
The squeezing together of rocks by stress is called SHEARING.
What is false, compression.
200
The stress force that pulls on the crust where two plates are moving apart is called ____________________.
What is tension.
300
In a normal fault, the part of the fault that lies below the other part is called the __________. a. hanging wall b. reverse fault c. footwall
What is c. footwall.
300
These types of waves cause the most destruction.
What are surface waves?
300
Look at the map on page 121. Where are earthquakes most likely to occur? a. east coast b. west coast c. south
What is b. west coast
300
In a STRIKE-SLIP FAULT, the rocks on either side of the fault slip past each other sideways.
What is true.
300
Shearing creates ____________________ faults, like the San Andreas fault in California.
What is strike-slip.
400
Plateaus are large, flat, elevated areas of land. What is one way plateaus can form?
What is they can form when forces in Earth's crust push up a large flat block of rock.
400
Which of these scales rates earthquakes damage at a particular location? a. Richter scale. b. moment magnitude scale. c. Mercalli scale.
What is c. Mercalli scale.
400
The pattern of lines made by a seismograph to record an earthquake's seismic waves is a ___________.
What is a seismogram.
400
An upward fold in a rock is called a PLATEAU.
What is anticline.
400
The block of rock that lies above a fault is called the ____________________.
What is a hanging wall.
500
In a strike-slip fault, the rocks on either side of the fault slip past each other sideways with little __________. a. noise b. shaking c. up-or-down motion
What is c. up-or-down motion.
500
The type of seismic waves that arrive at the surface first and move by compressing and expanding the ground like an accordion are called ___________. a. S waves.
b. P waves. c. Surface waves.
What are b. P waves.
500
How do scientists create maps of earthquakes?
What is they use past seismographic data.
500
When an earthquake occurs, S WAVES are the first seismic waves to arrive at a given location.
What is false, P waves.
500
The seismic waves that travel along Earth’s surface and produce the most severe ground movements are called ____________________.