Some estimates suggest that logging occurs ________ times faster in Southeast Asia than in the Amazon
A) 2
B) 3
C) 4
D) 5
E) 10
B
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What property of carbon allows for the formation of so many different organic molecules?
A. Carbon resides in the exact middle of the periodic table, from left to right, with exactly the same number of reactive elements on either side of it. It can therefore react with the maximum number of elements. B. Carbon atoms are unique in their ability to form strong chemical bonds repeatedly with other carbon atoms, which permits the formation of countless possible structures. C. Carbon forms three different isotopes which allows for the formation of many more molecules than other elements. D. Carbon atoms uniquely contain exactly the same number (six) of protons, neutrons, and electrons in their atomic structure.
Compared to the United States, Japan's gross national income in 1960 was
A. one half B. one third C. one eighth D. twice the size
Why are flammable liquids with low boiling points dangerous?
a. Such liquids react more readily with other substances. b. Such liquids typically have a high vapor density. c. Ignition temperature is proportional to boiling point d. Such liquids product large volumes of flammable vapor at relatively low temperatures.
What is the minimum temperature at which a liquid gives off sufficient vapor to ignite briefly if provided with a source of ignition?
a. Fire point b. Flash point c. Ignition temperate d. Flammable range