This is a colorless, corrosive gas that originates from burning coal and oil: ________
Fill in the blank(s) with correct word
sulfur dioxide
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How many times during the last 2.6 million years (the Quaternary Period) has Earth's climate cycled back and forth between glacial and interglacial periods?
A) 11 times B) more than 100 times C) 4 times D) 22 times
A shortest-path analysis can include intermediate stops between the origin and destination.
Answer the following statement true (T) or false (F)
In the U.S., the rate of new inventions and granted patents began to decline in which decade?
A) 1960 B) 1970 C) 1980 D) 1990 E) 2000
All of the following is true regarding the flow of air aloft in the mid-latitudes EXCEPT
A. west to east flow. B. east to west flow. C. circulation is restricted to the troposphere. D. wind speed aloft is greater than wind speed at surface.