1. Circle/indicate the correct answers in the following paragraph(s): When a sma
ID: 803801 • Letter: 1
Question
1. Circle/indicate the correct answers in the following paragraph(s):
When a small amount of force is applied to a rock, it behaves in an elastic/ductile/brittle (circle one) manner.
However if you put enough force on a rock, you will exceed its elastic strength, and the rock will undergo permanent changes in shape and/or size.
These permanent changes are known as deformation. Rocks can undergo either brittle or ductile deformation.
A rock undergoes brittle/ductile (circle one) deformation when it breaks and brittle/ductile (circle one) deformation when it bends.
A break in a rock along which the rock has moved is called a fault/fold (circle one) and a bend in a rock is called a fault/fold (circle one).
Different conditions tend to favor different types of deformation.
Ductile deformation is more common than brittle deformation at high/low (circle one) pressures, high/low (circle one) temperatures, high/low (circle one) rates of deformation, and when the rock type is soft, like clay.
Because temperature and pressure decrease/increase (circle one) with depth, ductile/brittle (circle one) deformation is more common deep under the ground than on the surface.
Thus, folds are often formed deep underground/on the surface (circle one) and faults are often formed deep underground/on the surface (circle one).
Explanation / Answer
1) elastic
2) brittle deformation when it breaks and ductile deformation when it bends
3) fault and fold respectively
4) high temperature and high pressure and low deformation rates
5) increases, ductile
6) folds on surface , faults form deep underground
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