Grab Bag
Geology
Earthquake Vocab
Take Your Chances!
Earthquake Safety
100
A break in the crust where rock slabs slip past each other is called this:
A fault
100
This movement squeezes rock together.
Compression
100
This type of wave arrives first at a seismograph:
P (or compressional) Waves
100
True or false: Moonquakes are a thing.
True! They are smaller in magnitude and happen less frequently than Earthquakes, and are thought to be a result of the tidal force between the Earth and Moon.  Scientists are still unsure of exactly why they happen, but they know that they do. 
100
This is the name of all of the other earthquakes that happen after the first earthquake...
Aftershocks
200
This is the name of the instrument used to measure and record ground movements during an earthquake:
A seismograph or seismometer
200
Why is it so difficult for geologists to predict earthquakes (what do they know and what do they NOT know?)
They know WHERE they will happen, but not exactly WHEN they will happen.
200
These waves move the slowest but cause the most damage:
L (or surface) Waves
200
If a P wave travels out of the rock and into the air, can you hear it?
Yes, it sounds like a rumble.
200

Your earthquake towers will need to fit 4 ________________ and be tested on the ____________________ ____________________ ___________________.

Your earthquake towers will need to fit 4 floors and be tested on the earthquake simulator table.

300
The scale used measure the magnitude of an earthquake and what is the range of the scale (# - #):
Richter scale, 1-10
300
This force pulls on the crust and stretches rock apart.
Tension
300
This is the point directly above the earthquake's focus:
The epicenter
300
What is the most earthquake prone state?
Alaska
300
This is produced from water displaced by an undersea earthquake.
A tsunami
400
Earthquakes all begin at this point underground:
The focus
400
This type of force produces a strike slip fault.
Shearing
400
These waves arrive after P waves:
S (or shear) Waves
400
What was the highest magnitude of an earthquake that was ever recorded?
9.5 in Chile
400
If a person is injured in an earthquake and they are not breathing, you should…
Begin CPR
500
When is "The Big One" expected to happen in California?
Sometime in the next 50 years
500
This type of fault forms when the hanging wall moves up past the footwall.
A reverse fault
500
Geologists draw circles to show distances from 3 seismograph stations to find this.
The epicenter of an earthquake
500
Name one of the two states with the fewest amount of earthquakes.
Florida and North Dakota
500
3 things you can do to your house to be prepared for an earthquake...
Bolt tall items to the wall, move bed away from the window, remove items from above your bed, bolt your foundation to a cement foundation or rock, put extra supports in the walls and at the joints...etc.
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