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Mikalah Smith

Chapter 6 Vocabulary

Plate A large section of Earth's crust and rigid upper mantle that moves around on the asthenosphere
Fault Surfaces that broken rocks move across
Earthquake The vibrations produced by the breaking of rock
Normal Fault Rock above the fault surface moves downward in relation to rock below the fault surface
Reverse Fault Surface is forced up and over the rock below the fault surface
Strike-slip Fault Rocks on either side of the fault are moving past each other without much upward or downward movement
Wave Rhythmic movement that carries energy through matter and space
Seismic Waves Generated by an earthquake and travel through Earth
Focus The point where the energy of an earthquake first occurs
Primary Waves Causes particles in rocks to move back and forth in the same direction that the wave is traveling
Secondary Waves Move through Earth by causing particles in rocks to move at right angles to the direction the wave travels
Surface Waves Move rock particles in a backward, rolling motion and side to side in a swaying moton
Epicenter The point on Earth's surface directly above the earthquake focus
Seismograph An instrument that measures seismic waves from earthquakes
Crest The highest point of a wave
Magnitude The height of lines traced on the paper of a seismograph is the measure of the energy that is released of the earthquake
Liquefaction The shaking from an earthquake causing soil to act like liquid
Tsunamis ocean waves caused by earthquakes and are called seismic sea waves
Created by: msmith1405