Exam 18: Deserts and Winds

On the blank spaces provided beside each illustration, write the name of the type of dunes shown in the illustration. a)______________________________ b)______________________________ c)______________________________ d)______________________________ e)______________________________ f)______________________________

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Which Canadian dryland area receives the least precipitation (<50 mm/yr)?

________ are complexly shaped dunes in the Sahara or Arabian deserts, formed in response to different, seasonal, wind directions.

________ dunes are long, high, sand dunes parallel with the prevailing wind direction.

How do barchan and parabolic dunes differ?

How is a dry climate defined?

How are sand grains transported by the wind?

About one-third of the Earth's land areas have arid to semiarid climates.

Which one of the following statements about sand dunes is correct?

Wind is viscous enough to lift sediment grains by suction alone.

Where are the subtropical high pressure air masses located?

Which type of dune resembles a transverse dune with scalloped edges pointing downwind?

What features or characteristics would distinguish a Paleozoic sandstone formation as being eolian (wind-blown)in origin rather than having formed from an ancient stream or coastal environment?

Which one of the following statements is true?

What was the source of North American loess deposits?

Which type of dune can be up to 90 metres tall and forms under variable wind directions?

Which one of the following would probably not affect the size and depth of a blowout?

Yardangs are streamlined, wind-sculpted ridges oriented parallel to prevailing wind direction.

Where is Canada's only non-polar desert located?