Question

question 12 of 20 : select the best answer for the question. 12. which criterion is not used to describe a mass movement event? a. the motion of the failure b. the rate at which the movement occurred c. the angle of the slope d. the type of material that failed mark for review (will be highlighted on the review page) << previous question next question >>

Explanation:

To determine which criterion is not used to describe a mass movement event, we analyze each option:

• Option A: The motion of the failure (e.g., slide, flow) is a key criterion for describing mass movements.
• Option B: The rate of movement (e.g., slow creep, rapid landslide) is used to classify mass movements.
• Option C: The angle of the slope is a factor that influences mass movement but is not a criterion to describe the event itself. Mass movement events are described by aspects like the type of motion, rate, and material involved, not the slope angle (which is a pre - event or influencing factor).
• Option D: The type of material that failed (e.g., rock, soil, debris) is an important criterion for describing mass movement events.

Answer:

C. The angle of the slope