# GEOLOGY

## EARTH SCIENCE

### EARTHQUAKES

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The elastic rebound theory states that as a rock becomes stressed, it first:
 A Deforms B Melts C Breaks D Shifts positions
Explanation:

Detailed explanation-1: -Elastic Rebound Theory The theory was first proposed in 1906 by H.F. Reid following the San Francisco quake. He based his theory on strike slip faults such as the San Andreas fault. It states that rocks begin to deform under stress and as the stress becomes greater, the fault ruptures.

Detailed explanation-2: -Detailed Description. 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-3: -Rocks that are stressed beyond their ability to stretch can rupture, allowing the rest of the rock to snap back to its original shape. The snapping back-called elastic rebound-causes the rock to vibrate, and this is what causes the shaking during an earthquake.

Detailed explanation-4: -Origin of Earthquakes The elastic rebound theory suggests that if slippage along a fault is hindered such that elastic strain energy builds up in the deforming rocks on either side of the fault, when the slippage does occur, the energy released causes an earthquake.

Detailed explanation-5: -A theory called the elastic rebound theory explains why an earthquake takes place. This theory basically states the a release of the stored strain in rocks cause movement along the fault. From there, tectonic forces act on a mass of rocks as they move pass each other. This makes the bending of the rock more severe.

There is 1 question to complete.