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43 Cards in this Set
- Front
- Back
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A _____ is a shaking of Earths crust caused by a release of energy? |
Earthquake |
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A record sheet called a _____ is placed on a drum attached to the base |
Seismogram |
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Seismograms can be used to determine the strength, or _______ of an earthquake |
Magnitude |
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The body waves known as compression waves , primary waves , or ______ squeeze and stretch rock materials as pass through earth and can travel through everything. |
P-waves |
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The point on earth's surface directly above the focus is the _______ of the earthquake |
Epicenter |
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A _______ is a break/crack in the lithosphere along which movement has occurred |
Fault |
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An instrument called a ______ detects and records waves produced by earthquake that may have originated hundreds, even thousands , of miles away |
Seismograph |
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____ ______ is a fault that causes most of the earthquakes in California |
San Andreas |
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Places where earthquakes have not been plotted over a period of time are called _____ ______ |
Seismic gap |
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A large earthquake may be followed by a seires of smaller ones originating close to the focus of the larger earthquakes. The smaller earthquakes are called _____ _____ |
After shocks |
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Underwater earthquakes and landslides sometimes cause huge ocean waves called ______ |
Tsunamis |
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The ___ _____ fault travels through Illinois and other states in the Midwest |
New madrid |
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The boundary that sperates the crust from the underlying mantle is known as the _____ |
Moho |
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Seismograph stations in what is called the earthquakes _____ _____ cannot detect P-waves and S-waves |
Shadow zone |
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_____ occurs when loose soil temporarily takes on some of the properties of a liquid |
Liquefaction |
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How does moment magnitude measure and earthquake ? |
By the energy released |
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What is an earthquake magnitude ? |
Size of seismic wave or amount of energy |
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Where do most of the worlds earthquakes occur? |
Around California |
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Which cause is the most common for earthquake? |
San Andreas fault |
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What's seismogram? |
The paper |
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What's the seismograph ? |
The lines made |
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Why do u need three seismograph stations to plot an earthquake? |
To know where the earthquake happen |
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WHAT WAVE IS THIS? |
P-waves |
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What wave? |
S-WAVES |
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What wave ? |
Rayleigh wave |
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What wave? |
Love wave |
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What does the Ritcher scale measure? |
Defines magnitude |
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What does the moment magnitude measure? |
Size of earthquakes |
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What does the modified Mercalli scale measure? |
Measures intensity of earthquake |
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What scale is more precise and used by scientists today to measure earthquakes? |
Modified Mercalli scale |
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What is the purpose of cities having earthquake codes and regulations for buildings? |
So when it actually happens they are ready |
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What are 5 ways damage is caused by an earthquake? |
-LandSlides -MudFlows -Liquefaction -Seismic shaking -Tsunamis |
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Which type of waves cause the most damage to cities? |
S - Waves |
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Station a is farthest from the earthquakes epicenter well station B was nearest what are three types of evidence from the tray seems to support the statement |
A seismograph is bigger for it and B is closer |
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What does the Ritcher scale measure? |
Measures the Earth's magnitude |
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What does the richer scale numbers represent? |
Represent the height of the largest seismic wave |
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How many times stronger is a 7 from an 8? |
10 times greater |
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what happened to P waves as they pass through the earth? |
They push and pull through particles in the direction the wave travels |
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What can it pass through? |
Liquid and solid |
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Describe what happened to s wave as they pass through the earth? |
Shake particles at right angle waves |
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What can it pass through? |
Solids |
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If you go in an area and a tsunami warning goes off what is the best thing for you to do? |
Go to a high hill or place |
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what is a seismic gap? |
Spyware earthquake hasn't happened in a long time |
