Ch 6

Fan shaped cones deposited at the mouth of a canyon in a desert are known as

Alluvial fans

Which features are produced by wind erosion

Blowouts

Which of the following statements characterizes ephemeral streams

Ephemeral streams flow only at certain times of the year

How does the glacial budget affect the advance of a glacier

Glaciers advance when the budget is unbalanced and accumulation is greater than wastage

Which glacial feature consist of a small glacial valley elevated above the main glacial valley and separated from it by a steep wall

Hanging valley

What two basic cycles are glaciers part of

Hydrologic and rock

Which terms best describe the movement of glaciers

Plastic flow and slip

Which of the following can cause dry and arid climate

Presence of a high mountain in the path of moisture bearing wind

How do pieces of rock move under the influence of wind

Rolling, sliding, bouncing, suspension

Which of the following events is not one of the major effects of ice ages

Shifting of tectonic plates

What property of a piece of material will most directly determine how it is carried by wind

Size

What do cross beds represent

The moving front of a ripple or dune

What is dust

The particles carried in suspension by wind

Which feature is not created by glacial erosion

V shaped valleys

In the desert environment how are ventifacts created

Ventifacts are produced on the surface of a rock by the continued impact of very small part carried by the wind

What will the glacial budget be for a glacier that is in a state of retreat

Wastage exceeds accumulation

Which of the following statements about deserts is true

Water is the most significant agent of erosion in deserts

Most of the erosion that took place during the dust bowl years of the 1930 in the Great Plains of North America was the result of which the following process

Wind

Why do desert dunes migrate

Wind erodes material on the back side of the dune and deposits it in the front side of the dune

Statements that are true about wind erosion

Wind is most efficient as an erosional agent in dry places , sediment deposited by wind in deserts can mostly be found in the form of sand dunes and loess deposits, an important erosion related role of wind in a desert is abrasion of rock surfaces

What is the relationship between water currents and cross beds

Cross bed sit at an angle to current direction

What are cross beds

Inclined layers in sediment or sedimentary rocks that rocks that reveal the direction of wave or wind transport

Which of the following statements regarding inselbergs in desert landscapes is true

Inselbergs are erosional remnants of the underlying bedrock that are nearly covered by desert deposits in the late stage in the development of mountains deserts landscapes

Depositional features created by wind include

Loess dunes

The majority of the loess deposits on the Great Plains owe those accumulating to which of the following explanations

Loess in the Great Plains accumulated as fine sediments blown out wash deposits adjacent to the retreating continental ice sheet

Where on the planet were ice sheets most extensive during the ice age

North America

Which of the following dune types would you expect to exhibit an arced shape that opens in the upwind direction but where the slip face occurs on the downwind side of the dune

Parabolic

Which type of sand dune consist of a u shaped with the tips pointing upwind forming in area where there is some vegetation present

Parabolic

When desert pavement is produced in a desert why do the larger particles accumulate on the surface

The wind can move particles of only a very specific size and it takes away these small particles concentrating the large ones

Which of the following terms best describe long sinuous bed form that develop perpendicular to the prevailing wind direction in desert environment

Transverse dunes