Exam 13: Climatic Extremes: Deserts and Glaciers

Irrigation in the Great Plains,as shown in the figure below,helps prevent desertification,but it also leads to _____.

Explain how solid ice can flow within a glacier.

How do glaciers shape the land across which they flow?

Arid and semi-arid regions are collectively known as _____.

Rainshadow deserts form when a mountain range creates a barrier to the flow of moist air,causing a zone of low precipitation to form on the downwind side of the range.

A ridge of material that rides along the middle of a glacial ice stream is called a _____ moraine.

What techniques can be used to halt desertification of agricultural lands?

A ventifact is a steep-sided,flat-topped desert landform.

A desert that forms on the leeward slope a mountain is called a rain _____ desert.

A _____ is a broad lobe of ice that terminates on open slopes beyond a mountain front.

A _____ dune,shown in the figure below,forms from shifting wind directions and abundant sand.

The main mechanism of glacial movement is _____.

Freeze-thaw cycles in tundra create _____ ground.

Rainfall in a desert region typically results from intense downpours that occur during a brief rainy season.