Which of the following can be characterized as a strong acid?
A) 0.001 M HCl
B) 3.0 M CH3COOH
C) both a and b
D) neither a nor b
A
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After the drought of the 1930's farmers in the Great Plains were encouraged to plant rows of trees across fields to decrease soil erosion. How would this reduce soil erosion?
A) The trees can serve as windbreaks to slow wind erosion. B) The trees helped shade the ground, retaining moisture. C) Tree roots would retard runoff and prevent erosion. D) The trees had no effect; they were just used to improve the land appearance after the great depression.
Which of the following would not be true regarding the urban heat island?
A) Changes in albedo B) Retention of rain water C) Nighttime retention of longwave radiation D) High concentration of waste heat from industry
Some 74 percent of Sri Lanka's 21 million people are Sinhalese-speaking Buddhists, with much of the balance being
A) Pakistani-speaking Muslims B) French-speaking Catholics C) English-speaking Christians of British descent D) Tamil-speaking Hindus of Dravidian descent
The two major types of energy are ____.
A. chemical or physical B. kinetic or mechanical C. potential or mechanical D. potential or kinetic E. chemical or kinetic