Concept #4 Quiz

[Skip Breadcrumb Navigation]

Choose the best possible answer to the following questions about Key Concept 4 "Erosion by wind."

This activity contains 5 questions.

What has to be true in order for wind to be an effective erosive agent?

wetness and plush vegetation in local spotsdryness and scanty vegetationsteepness of slopedryness and plush vegetation in local spots

Match the following features of deserts with the appropriate description:

A matching question presents 5 answer choices and 5 items. The answer choices are lettered A through E. The items are numbered 2.1 through 2.5. Screen readers will read the answer choices first. Then each item will be presented along with a select menu for choosing an answer choice. Using the pull-down menus, match each item in the left column to the corresponding item in the right column.

	a streamlined, wind-sculpted ridge oriented parallel to the prevailing wind
	a stony veneer created as the land level lowers by the removal of smaller particles until only the coarse particles remain
	interestingly shaped stones where the side exposed to the wind is pitted, but the other side is “fresh,” unless the wind came from many different directions
	the lifting and removal of loose material over a large area, lowering the surface elevation progressively
	shallow depression caused by removal of loose material in local spots

2.1 deflation
2.2 blowout
2.3 desert pavement
2.4 ventifact
2.5 yardang

Which of the following would probably NOT affect the size and depth of a “blowout” in a desert?

a rise in sea levelareas of desert pavementthe near surface water tabletype and density of vegetation

When not covered in sand, the desert floor is a flat plain of relatively angular blocks. What the term for this type of feature, and what type of wind erosion has formed it?

blowout by deflationyardang by ventificationventifact by sandblasting in one directionpavement by deflation

Which of the following best describes the formation of “desert pavement”?

alluvial fans are eroded to form inselbergs with flat, angular rocky surfacesdeflation removes the coarse fragments leaving behind a layer of fine sediment (loess and mud)runoff and deflation carry off the fine particles of silt and clay, leaving coarser particles behindgroundwater in an alluvial fan evaporates, leaving behind a surface layer of hard-baked mud and boulders

The Submit Answers for Grading feature requires scripting to function. Your browser either does not support scripting or you have turned scripting off.

So, the Submit Answers for Grading button below will not work.

The following Submit Answers for Grading button is provided in its place and will clear your answers:
The Clear Answers and Start Over feature requires scripting to function. Your browser either does not support scripting or you have turned scripting off.

So, the Clear Answers and Start Over button below will not work.

The following Clear Answers button is provided in its place and will clear your answers:

Your browser either does not support scripting or you have turned scripting off. Because of this, the answer choices will NOT appear in a different order each time the page is loaded, though that is mentioned below. Note that you do not need this feature to use this site.

Answer choices in this exercise appear in a different order each time the page is loaded.