Exam 16: Weathering and Mass Movement

Weathering acts faster on which surface of a rock?

Speleothems form and grow only in caves that are flooded with water.

Hoodoos are example of ________.

Mass wasting events causing 1,000 deaths or more occur, on average, about every __________ years.

The removal of vegetation nearly always increases the risk of mass movement.

-Cattle terraces, shown in the photo, are most similar to what type of natural mass movement?

Scientists can assess the landslide risk using remote sensing.Which factor is not used to determine the global landslide risk?

Rust is a result of physical weathering.

Can scientists predict landslides with accuracy?

-In the photo, box B points to what?

Tafoni results from what type of physical weathering?

​ -In terms of slope stability factors in Table 16.2, removal of vegetation does what?

A ____________ forms when two or more talus cones merge.

Freeze-thaw cycles result in __________.

The process of weathering has been going on since Earth first formed and never stops, yet many rocks are still "fresh" and relatively unweathered.Why haven't all of Earth's rocks been weathered away long ago?

__________ is the process in which joints form parallel to the rock surface, creating sheetlike slabs.

-In the figure, box B shows what?

Repeated rockfall events in the same location can carve notches into the bedrock called __________.

An increase in soil friction, electrical charges in soil, and plant roots can all do what to the stability of a slope?

Where a stream flows out of the ground and onto the surface in a karst region, it is called a(n) __________.