GEOGOEOGEO

Abrasion is usually confined to a zone that extends up to ________ above the ground.

1 m (3.28 ft)

As the discharge of a stream increases, which of the following also happens?

Width, depth, and velocity all increase

The largest material that can be carried by a stream is carried as

bed load.

The total possible load a stream can transport is its ________, whereas a stream's ability to move particles of specific size is its ________.

capacity; competence

Karst topography is formed primarily by

carbonic acid solution.

As a stream's carrying capacity decreases, which of the following sizes of sediments will be deposited last?

clay

The suspended load of a stream consists of particles that are

held aloft in the stream flow.

Chemical weathering is greatest under conditions of

higher mean annual rainfall and temperatures.

The ability of the wind to move materials

is small compared to other transporting agents, such as water and ice.

Desert pavement refers to

surfaces of concentrated pebbles and gravels that are produced by particle removal and water-delivered cementing materials.

The rate at which rocks weather depends upon

the climate of an area. the type of rock. the amount of vegetation in an area. ALL OF THESE.

Rocks that appear pitted and grooved, and sometimes polished smooth by eolian processes, are termed

ventifacts.

The major erosional force in the desert is

water and fluvial processes.

Other than the rock itself, the most important chemical substance needed for the majority of weathering processes is

water.

Which of the following is true of spheroidal weathering?

It attacks the corners and edges of rocks.

Which of the following is likely to occur if the gradient of a stream increases? (Assume that the discharge and sediment load remain unchanged.)

The stream will begin to erode its channel and/or its banks.

When a river reaches a base level, its forward velocity rapidly decelerates as it enters a larger body of standing water and ________ is formed.

a delta

The general term for clay, silt, and sand deposited by running water is

alluvium.

As base level is approached by a stream, the ability of a stream to erode its bed

decreases.

The lowering of the land surface by the lifting and removal of material is termed ________, whereas the grinding of rock surfaces with a "sandblasting" action is ________.

deflation; abrasion

All processes that cause the wearing away or rearrangement of landforms are included in the term

denudation

The term "eolian" refers to

erosion, transportation, and deposition by the wind

The large sheets of rock that break off batholiths, such as Half Dome in Yosemite National Park, develop as a result of

exfoliation.

The fact that water expands as much as 9 percent of its volume as it freezes is the basis of

frost wedging.

If a stream has just the gradient and discharge to transport its sediment load, it is said to be

graded.

The impact of saltating particles acts to

initiate movement and abrade surfaces.

Relative to dune movement and form, a dune's slipface forms on which side?

leeward side

Which type of weathering is limited to arid environments?

salt-crystal growth

What size material composes the dust in a dust storm that extends thousands of feet above the ground?

silts and clays

The disintegration and dissolving of surface and subsurface rock is called

weathering.