Earth Sci. 2nd Qtr Quiz 5 Part 2 Earth's Structure pages 110 - 117 : Equakes & Seismic Waves

O . Y . O . Page 111 , Key
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O . Y . O . Page 111 , Key
Seismic waves are vibrations that are similar to what ?
O . Y . O . Page 111 , Key
As seismic waves travel through Earth , what do they carry with them ?
The material through which the waves travel ( Page 111 )
What does the speed and path of seismic waves depend in part on ?
The area beneath Earth's surface where rock that was under stress begins to break or move ( Page 112 )
Define focus .
The point on the ( Earth's ) surface directly above the focus . ( Page 112 )
Define epicenter .
Two parts : Part 1 : Lithosphere ; Part 2 : within about 100 kms beneath Earth's surface ( Page 112 )
Most earthquakes start within what sphere and depth of Earth's surface ?
Both solids and liquids ( Page 113 )
What states of matter can P waves travel through ?
Solids ( Page 113 )
What states of matter can S waves travel through ?
Modified Mercalli scale ( Page 114 , the key )
What scale rates the amount of earthquake damage or shaking that is felt ?
Richter scale ( Page 114 , the key )
What scale rates the magnitude or size of an earthquake ?
The amount of shaking from an earthquake ( Page 114 )What does the Modified Mercalli rate ?Two parts : Part 1 : People's observation ; Part 2 without the use of any instruments ( Page 114 )What is the rating for this scale ( Modified Mercalli scale ) done by ?Two parts : Part 1 : A single number that geologists assign to an earthquake ; Part 2 : based on the earthquake's size ( Page 114 )What is an earthquake's magnitude ?Total energy an earthquake releases ( Page 115 )What do geologists use the moment magnitude scale to rate ?Moment magnitude below 5 ( Page 115 )Earthquakes with a moment magnitude of what # are considered small and cause little damage ?Moment magnitude above 6 ( Page 115 )Earthquakes with a moment magnitude of what # can cause great damage ?Moment magnitude above 8 ( Page 115 )Earthquakes with a moment magnitude of what # are most powerful and considered rare ?This helps geologists identify areas where earthquakes may occur in the future . ( Page 116 )Why do geologists try to pinpoint the epicenter of an earthquake ?The greater the time between the arrival of the P waves and the S waves . ( Page 116 )What happens to the time between the arrival of the P waves and the S waves as the distance the earthquake is from a given point gets greater ?