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Earthquake Unit

Chapter 4

QuestionAnswer
Type of stress that occurs when two plates pull apart. Tension
Type of stress that occurs when two plates come together. Compression
Type of stress that occurs when two plates slide past each other. Shearing
A force that acts on rock to change its shape or volume. Stress
Break in rock Fault
Name for the block of rock that sits over the fault. Hanging Wall
Name for the block of rock that lies under the fault. Footwall
Fault type that occurs when two plates pull apart Normal Fault
Fault type that occurs when two plates come together Reverse Fault
Fault type that occurs when two plates slip past each other Strike-slip Fault
A fold in rock that bends downward Syncline
A fold in rock that bends upward Anticline
Folded mountain form at this type of boundary Convergent
Mountains that form from tension in Earth's crust that causes faulting Fault-block Mountains
Large area of flat land elevated high above sea level Plateau
Shaking that results from movement of rock beneath Earth's surface. Earthquake
Waves that carry energy released by an earthquake. Seismic Waves
Area beneath Earth's surface where rock breaks. Focus
Point on the surface directly above the focus Epicenter
Seismic waves that compress and expand P Waves
Seismic waves that can vibrate from side to side S Waves
Slowest and most damaging seismic waves Surface Waves
Instrument that records and measures an earthquake Seismograpph
Scale that rates the amount of shaking from an earthquake Modified Mercalli Scale
Single number that geologists assign to an earthquake based on size Magnitude
Earliest magnitude scale Richter Scale
Scale that rates the total energy an earthquake releases Moment Magnitude Scale
The record of the earthquake's seismic waves Seismogram
Created by: sciencemonkey21
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