Miscellaneous
Geology
Earthquakes
Effects on Land
Earthquake Safety
100
A break in the crust where slabs slip past each other is called this
What is a fault?
100
This stress squeezes rock together and causes a reverse fault
What is compression?
100
This type of wave arrives first at a seismograph
What is a P wave?
100
This is a force that acts on rock to change its shape or volume
What is stress?
100
This is the name of all of the other earthquakes that happen after the first earthquake
What is an aftershock?
200
This is the name of the instrument used to measure and record ground movements during an earthquake
What is a seismograph?
200
Compression, tension and shearing are three types of this
What is stress?
200
These waves move the slowest but cause the most damage
What are surface waves?
200
These are two types of folds in the land
What are anticlines and synclines?
200
This is what happens when an earthquake adds moisture to a sandy area
What is liquefaction?
300
This is how they measure the magnitude of an earthquake
What is the Richter scale?
300
This is a large area of flat land that is elevated high above sea level
What is a plateau?
300
This is the point directly above the earthquake's focus
What is the epicenter?
300
This stress force pulls on the crust and stretches rock
What is tension?
300
This is produced from water displaced by an undersea earthquake
What is a tsunami?
400
Earthquakes all begin at this point
What is the focus?
400
What the crust does to produce anticlines and synclines
What is folds (or folding)?
400
These waves arrive after P waves
What are S waves?
400
This type of fault forms when the hanging wall moves upward past the footwall
What is a reverse fault?
400
This is the type of building that DECREASES the amount of energy that reaches the building during an earthquake.
What is a base isolated building?
500
This is the general term for what causes aftershocks, tsunamis and liquefaction
What are seismic waves?
500
Why is it so difficult for geologists to predict earthquakes (what they know and what they don't know)
What is they know where they will happen, but not when they will happen?
500
Geologists draw circles to show distances from 3 seismograph stations to find this.
What is the epicenter of an earthquake?
500
This type of stress force produces a strike slip fault
What is shearing?
500
3 things you can do to your house to be prepared for an earthquake
What is 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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