1 .		Running water is the most important external agent of landform development in arid lands.   True  False
2 .		Almost all the desert streams in the world are ephemeral.   True  False
3 .		The smaller lakes found in arid environments are nearly always the product of either subsurface structural conditions or exotic streams from nearby mountains.   True  False
4 .		Bornhards are very unstable and may disintegrate in a few thousand years.   True  False
5 .		A pediment surface is created by deposition rather than erosion.   True  False
6 .		Pediments develop as desert mountains are worn down by weathering and erosion.   True  False
7 .		The Colorado River cannot be classified as an exotic stream.   True  False
8 .		Desert depositional features consist mostly of talus or alluvium accumulations.   True  False
9 .		Wind carries tiny dust particles in suspension, while larger particles are moved by saltation and traction.   True  False
10 .		Aeolian processes are those related to water action.   True  False
11 .		Best known of all dune forms is the transverse.   True  False
12 .		A barchan is crescent shaped.   True  False
13 .		Seifs are long, narrow dunes that usually occur in groups and in a generally parallel arrangement.   True  False
14 .		The immediate origin of loess is aeolian depositon.   True  False
15 .		The interior of the southwestern United States is characterized by basin-and-range topography.   True  False
16 .		One of the most widespread topographic features found in any desert area is the alluvial fan.   True  False
17 .		The most prominent location for mesa-and-scarp terrain can be found in the Four Corners region of Southwestern United States.   True  False