EARTH SCIENCE
EARTHQUAKES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When rocks deform and snap!
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When rocks deform to a point that they snap and then return exactly to their starting position.
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When rocks deform to a point that they snap and then return near their starting position.
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None of the above
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Detailed explanation-1: -Similarly, the crust of the earth can gradually store elastic stress that is released suddenly during an earthquake. This gradual accumulation and release of stress and strain is now referred to as the “elastic rebound theory” of earthquakes.
Detailed explanation-2: -The elastic rebound theory is an explanation for how energy is spread during earthquakes. As rocks on oppo-site sides of a fault are subjected to force and shift, they accumulate energy and slowly deform until their inter-nal strength is exceeded.
Detailed explanation-3: -Elastic rebound is what happens to the crustal material on either side of a fault during an earthquake. The idea is that a fault is stuck until the strain accumulated in the rock on either side of the fault has overcome the friction making it stick.
Detailed explanation-4: -Which of the following is part of the elastic rebound theory? A rock that has been deformed by movement along a fault can suddenly snap back to its original shape.
Detailed explanation-5: -Elastic Rebound Theory states that elastic strain build up movement on fault, which releases energy in the form of seismic waves.