Geology102:Quiz-Unit10

What is mass wasting and why does it occur on a slope?

• The movement of water downhill due to gravity

• The gradual buildup of sediment on a slope

• The downslope movement of rock and soil due to gravity

• The formation of mountains through tectonic activity

What was a significant effect of the 1983 Thistle landslide?

• It created a new mountain range

• It dammed the Spanish Fork River, creating a lake

• It caused a volcanic eruption

• It led to the discovery of a new mineral

Which of the following is a basic trigger of mass-wasting events?

• Earthquakes

• Solar flares

• Ocean currents

• Wind erosion

What is the angle of repose?

• The angle at which water flows uphill

• The angle at which rock and soil material is stable and will not move downslope

• The angle at which the sun hits the earth

• The angle at which wind moves sand

What happens when the shear force exceeds the normal force on a slope?

• The slope becomes more stable

• The material starts to move downhill

• The slope angle decreases

• The material becomes lighter

Which type of mass wasting involves rock movements that detach from steep slopes or cliffs?

• Creep

• Flows

• Falls

• Rotational slides

What is the effect of freezing and thawing on soil particles on a slope?

• Soil particles move uphill.

• Soil particles remain stationary.

• Soil particles move downhill.

• Soil particles evaporate.

Which feature is NOT typically associated with landslides?

• Escarpments

• Fault scarps

• Soil ripples

• Offset structures

What event occurred on June 23, 1925, near Jackson Hole, Wyoming?

• A volcanic eruption

• A translational rock slide

• An earthquake

• A tornado

What was the primary cause of the 1925 Gros Ventre rock slide?

• Volcanic activity

• Heavy rains and rapidly melting snow

• Human construction

• Animal activity