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Assessment 2

Authored by Cindy Kadir

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University

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Assessment 2
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21 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 1.

What is created when stress applied on a rock causes it to become permanently deformed?

(A)

Stratigraphy

(B)

Structure

(C)

Diagenesis

(D) All of the above

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

2. Stress is the force per unit area acting on any surface within a solid such as a rock or grain.

(A)

True

(B) False

(C) None of the above

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

3. Considering the example of a single clastic grain buried within the earth, at any given time, what forces may be acting on the buried grain?

(A)

Gravity and inertia

(B)

Viscous forces

(C)

Pressure

(D)

(b) and (c)

(E)

All of the above

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 4.

If the stresses on all parts of a rock grain are the same, the stress field is said to be:

(A)

homogeneous

(B)

tensional

(C)

compressional

(D) All of the above

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 5.

In geology, principal stress is always spoken of in terms of compression, rather than tension.

(A)

True

(B)

False

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 6.

Within the earth's crust, the most common stress situation is:

(A)

Uniaxial stress, where two principal stresses are zero and the other is nonzero.

(B)

Biaxial stress, where two principal stresses are nonzero and the other is zero.

(C)

Triaxial stress, where all three principal stresses are nonzero.

(D)

Pure shear stress.

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 7.

Strain is a measure of the change in length of any element (such as shape or volume) in a body of rock compared to the original length of that element, which may increase in some directions and decrease in other directions.

(A)

True.

(B)

False.

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