mass movements
vocabulary
true or false
numbers & more
glaciers & more
100

What is the slow downhill flow of loose, weathered Earth materials, especially soils, called?

What is creep

100

Wearing away of a structure by wind and sand particles. 

What is abrasion?

100
A dune is NOT a pile of windblown sand.

What is false.

100

The last continental ice age covered approximately what percent of Earth's surface?

What is 30%

100

Which is the underlying force that causes all forms of mass movements?

What is gravity. 

200
What often triggers a landslide?

What is earthquakes


200
The sliding down of a mass of earth or rocks from a mountain or cliff is a?

What is a landslide.

200

Deflation blowouts are found in areas where there is little to no wind. 

What is false. 

200

Which particles can wind move most easily?

What is silt. 

200

The coarse surface left behind after deflation is:

What is desert pavement. 

300
Slumps often occur in areas that have thick ________ on moderate slopes. 

What is soil

300

What does USGS mean?

What is the United States Geological Survey.

300

Moraines are formed when glaciers melt.

What is true. 

300

About __________ avalanches occur in mountainous areas with thick accumulations of snow.

What is 10,000. 

300

Which one is not a location in which more snow falls than melts? 

What is both continental and valley glaciers. 

400

Which mass movement is the fastest?

What is avalanche. 

400

What are elongated landforms made of older moraines over which glaciers have moved?

What is drumlins. 

400

Permafrost is the permanent frozen ground under Earth. 

What is true. 
400

Which range of slope angles of slope is associated with producing an avalanche? 

What is between 35% and 45%. 

400

What does NOT affect the speed of a valley glaciers movement?

What is the internal chemistry of the glacier. 

500

Which is not classified as a mass movement?

What is drumlins. 

500

Valley glaciers scoop out deep depressions called:

What is cirques. 

500

Ice melts and runs off to form eskers. 

What is false. 

500

Which formed the structure in the photo?

What is wind.

500

What type of dune is a solitary crescent shape?

What is a Barchan Dune. 

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