The vibrations produced by the breaking of rock is an __________________.
earthquake
100
What is the name of the largest fault in California?
The San Andreas fault
100
Which seismic waves are the most destructive and why?
Surface waves because they move not only back and forth but side-to-side.
100
A measure of the energy released in an earthquake is the ___________________.
magnitude
100
What are some ways to help ensure that a structure is earthquake resistant?
Flexible moorings, reinforced beams, alternating layers of rubber and steel, rectangular or box-shaped buildings, etc...
200
When rocks break, they move along surfaces called _____________.
faults
200
Describe how the focus and epicenter related to each other.
The focus is the point underneath Earth's surface where energy is first released in an earthquake. The epicenter is located directly above the focus on the Earth's surface.
200
The point where energy is first released in an earthquake is the ______________.
Focus
200
You may open your books for this question. Pg. 314
What is ironic about the data on Table 1?
An earthquake with a 9.5 magnitude killed 490 to 2,290 people. An earthquake with an 8.2 magnitude killed 242,000 people..(or something along these lines)
I forgot to say that this question is worth triple the points (600pts!)
200
If you are outside during an earthquake, what should you do to remain safe?
Stay in the open--move away from power lines, things that can fall over (trees, chimneys etc.)
300
Once the ____________________ is passed rocks can no longer bend and stretch so they may break
elastic limit
300
What are the three types of seismic waves?
Primary, secondary, and surface waves
300
The earthquake ________________ is the point on Earth's surface directly above the earthquake focus.
epicenter
300
Ocean waves caused by earthquakes are called seismic sea waves or ______________.
Tsunamis
300
Daily quadruple! (xs 4 kids : )
The Richter scale measures earthquake magnitude. What does the Mercalli scale measure?
The Mercalli scale is a measure of damage caused by the earthquake or a measure of the intensity of the earthquake.
400
What are the three types of faults?
normal, reverse, and strike-slip
400
_______________________ generated by an earthquake travel through Earth.
Seismic waves
400
What is a seismograph?
The instrument used to measure seismic waves from earthquakes
400
When the shaking from an earthquake causes wet soil to act like a liquid, the process of ___________________ has taken place.
liquefaction
400
What area in the U.S. is prone to have earthquakes due to a large number of faults?
West coast--California
500
Daily Double: 1000 pts!
What are the three types of forces that act on rocks?
tension, compression, and shear
500
Describe how each of the three types of seismic waves move.
Primary waves move in a back and forth direction. Secondary waves move side-to-side or at right angles to the direction of the wave travel. Surface waves move back and forth and side-to-side.
500
What is the difference between a seismograph, a seismogram, and a seismologist?
A seismograph is the instrument used to measure seismic waves from earthquakes. A seismogram is the record (piece of paper) on which earthquake data is found. A seismologist is the scientist who studies earthquakes and seismic waves.
500
What are some things that you can do to make sure you and your home are safe during an earthquake?
Varied answers- bolt furniture to the wall, stand in a doorway or get underneath something, move heavy objects from high shelves to low shelves...etc.
500
What is a warning sign that a tsunami is about to occur?