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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

The term rain shadow describes the:

a. low rainfall that is typical on the leeward side of mountains.

b. low rainfall that is typical at 30° latitude.

c. high rainfall that is typical on the windward side of mountains.

d. blocking of rain by vegetation in dense tropical forests.

e. low rainfall that is typical in the interior of continents.

Summary Introduction

Introduction:

When the rising air mass encounters a mountain range, it either crosses it or sheds-off its water depending upon the height of the mountain and the saturation of the air mass. This creates two sides of the mountain, which are the rain shadow area and the area that receives rainfall.

Explanation

Justification/Explanation for the correct answer:

Option (a) is given that the leeward side of the mountain is called the rain shadow area. The rain shadow area implies that side of the mountain that gets devoid of rainfall. This occur because the clouds fail to cross the mountain. Thus, the entire water is shed off on the side which first encounters the moving winds. Hence, option (a) is correct.

Explanation for the incorrect answers:

Option (b) is given that the rain shadow area refers to the low rainfall region present at 30° latitude. The equatorial regions between 0°and 30° north and south of the Equator receive ample amount of rainfall. The rain shadow area is in reference with the altitude, rather than with the latitude. So, it is an incorrect option.

Option (c) is given that the rain shadow area refers to the windward side of the mountain that receives high rainfall...

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