The southern part of the Sahara, subject to major droughts especially under conditions of global warming, is called the __________________.
Fill in the blank(s) with the appropriate word(s).
Sahel
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Acid deposition is properly defined as the ____ deposition of ____ pollutants onto the earth's surface.
A. wet; primary B. wet; secondary C. wet and dry; primary D. wet and dry; secondary E. dry; primary
Verify Local Connectivity and Test Access Control List
A) the growth of international and supranational organizations uniting the world's people B) the trend toward international trade agreements among the countries of the world C) the growing interconnectedness of people and places through converging processes of economic, political, and cultural change D) the spread of McDonald's throughout the world E) the pattern of increasing telephone and Internet connections around the world
Which of the following are differences between an eruption column and pyroclastic flow?
A. Tephra in an eruption column stays hotter until it reaches the ground. B. Damage from an eruption column is more restricted than a pyroclastic flow. C. A pyroclastic flow rises higher into the atmosphere than an eruption column. D. A pyroclastic flow forms when the gas flux cannot support the column.
What is the movement of water over Earth’s surface?
A. evaporation B. precipitation C. streaming D. runoff E. welling