Exam 21: Dry Regions: the Geology of Deserts

What is an ephemeral stream?

Very hot air just above the ground creates a wavering pool of light on the ground known as a(n)________.

Fine-grained,wind-blown sediments are eventually deposited as ________.

The figure below illustrates the formation of a ________.

To qualify as a desert,a region must ________.

Calcrete (caliche)forms in a desert climate through the dissolution and the re-precipitation of ________ during and after rainstorms.

During heavy rainstorms,rates of physical weathering and erosion are ________.

Conversion of productive land to desert is known as ________.

The geometry of sand dunes is NOT strongly influenced by the ________.

Why is the Great Salt Lake in Utah so salty?

Imagine you are a farmer moving into the Great Plains area after the Dust Bowl of 1933.What can you do to make the land fertile enough for farming again? What can be done to prevent a similar disaster from happening again?

Which statement about desert life is correct?

The Gobi in Mongolia is a desert primarily because it is located ________.

Most of the erosion in desert environments is caused by ________.

A(n)________ consists of sand and gravel deposited by ephemeral distributary channels that occur where a gully or a canyon discharges from its mouth.

The process of lowering the land surface by wind erosion is known as ________.

At 30° north latitude,at the northern edge of tropical (Hadley)cell convection in the northern hemisphere,________.

Fine-grained sediment,such as dust and silt,can stay in the air and be transported by wind in ________.

The Sahara is a desert primarily because it is located ________.

The measured rainfall shown in the figure below is characteristic of a ________.