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Gourgoulianis
Earthquakes
27
Science
7th Grade
03/04/2014

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Cards

Term
Faults
Definition
A surface that rocks move along when they break
Term
Earthquake
Definition
The vibrations produced by the breaking of rock
Term
Normal fault
Definition
Rock above the fault surface moves downward in relation to rock below the fault surface
Term
Reverse fault
Definition
Rock above the fault is forced up and over the rock below the fault surface
Term
Strike-slip fault
Definition
Rocks on either side of the fault are moving past each other without much upward or downward movement
Term
Seismic wave
Definition
Pressure wave generated by an earthquake
Term
Focus
Definition
Point underground where earthquake begins
Term
Epicenter
Definition
Point on Earth's surface right above the focus point
Term
Primary waves
Definition
Fastest, underground
Term
Secondary waves
Definition
Next fastest, underground
Term
Surface waves
Definition
Slowest, travel on surface, most destructive
Term
Seismograph
Definition
Instrument used to measure earthquakes (size and location)
Term
Magnitude
Definition
Strength of earthquake
Term
Richter scale
Definition
Measurement of earthquake magnitude
Term
Liquefaction
Definition
When ground acts like a "liquid" during an earthquake
Term
Tsunamis
Definition
Large wave caused by an earthquake
Term
True or False: Earthquakes are vibrations caused by breaking rock.
Definition
True
Term
True or False: A strike-slip fault is found at a divergent boundary.
Definition
False. A strike-slip fault is found at a transform boundary.
Term
True or False: Magnitude is an instrument used to measure earthquakes.
Definition
False. Magnitude is the strength of an earthquake.
Term
True or False: Liquefaction is when the ground act like a "liquid" during an earthquake.
Definition
True
Term
Where did the largest recent earthquake occur?
Definition
California
Term
How many earthquakes occur each year?
Definition
500,000
Term
How many of them can actually be felt?
Definition
100,000
Term
What percent does that represent?
Definition
20 Percent
Term
Where was the largest earthquake ever recorded?
Definition
Chile
Term
Where and when was the world's most deadly earthquake?
Definition
Central China, 1556
Term
How often do earthquakes with a magnitude over 10.0 occur each year?
Definition
Extremely rare (unknown)
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