Ch 05.3: Mass Movements

The process responsible for moving material downslope under the influence of gravity is called ___.

• erosion

• weathering

• mass movement

• soil formation

What is the force behind mass movements?

• the sun's energy

• flowing water

• gravity

• moving ice

Tags

NGSS.MS-ESS2-2

Which of the following is NOT true about mass movement?

• Some mass movement is too slow to be seen.

• Mass movement always leads to landslides.

• Gravity is the driving force behind all mass movements.

• Mass movement is always downslope.

What factor commonly triggers mass movements?

• saturation of surface materials with water

• earthquakes

• removal of vegetation

Tags

NGSS.MS-ESS2-4

Why can the removal of vegetation trigger mass movements?

• The soil loses nutrients and begins to crumble.

• The plant roots bind the soil and regolith together.

• The shaking triggers mass movements.

• The plant roots lubricate the loose sediment.

Tags

NGSS.MS-ESS3-2

Oversteepened slopes often lead to mass movements because...

• ...the angle of their slope is between 50 and 60 degrees.

• ...plants cannot grow on them.

• ...the angle of their slope is less than 50 degrees.

• ...the angle of their slope is greater than 40 degrees.

During what season would you expect mass movements to be a greater threat?

• a dry summer

• a wet spring before vegetation is growing

• a wet spring with lots of growing vegetation

• a dry autumn after the leaves have turned

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

A mass movement that involves the sudden movement of a block of material is called a ___.

• rockfall

• slide

• slump

• flow

When a block of material moves downslope along a curved surface, the type of mass movement is called ___.

• a rockfall

• a rockslide

• a slump

• creep

What is the slowest type of mass movement?

• a slump

• a rockfall

• an earthflow

• creep