Supplies of potable freshwater are in short supply in many parts of the world because

A. of salt water intrusion.
B. of pollution of lakes and rivers.
C. irrigation uses all of the freshwater is many areas.
D. None of these are correct.


Answer: B

Environmental & Atmospheric Sciences

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Which of the above molecules is a carboxylic acid?

A. a B. b C. c D. d E. none of the above

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A deposit of unconsolidated sediment that extends landward from low tide to a change in topography

or to where permanent vegetation begins is a: a. spit. b. tombolo. c. barrier island. d. beach. e. baymouth bar.

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One of the main topics discussed in the opening two-page spread of Chapter 1 (The Nature of Physical Geography) was

A) the relevance of geography in our modern world. B) that volcanoes have dramatically changed the atmosphere over time. C) a huge meteorite impact caused the dinosaurs to become extinct. D) All of these choices are correct

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The Gulf Stream is the name given to:

A) the circulation of water in the Gulf of Mexico. B) a counter-clockwise surface current in the Gulf of California. C) the current carrying cold water from the North Pole along the West Coast of the United States. D) a warm current carrying water from the equator along the East Coast of the United States.

Environmental & Atmospheric Sciences