Why is there a drastic reduction in ozone in the spring?
A. It is warmer in the spring.
B. There is a sudden increase in Cl atoms in the spring.
C. There are more chlorofluorocarbons in the spring.
D. all of the above
E. only a and b
Answer: B
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The __________ Chinese make up 92 percent of the Chinese population.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not the name of a supercontinent?
A) Gondwana B) Laurasia C) Pangaea D) Rodinia E) Tethys
Metals are both good heat conductors and also good electrical conductors because of the
A) similarity between thermal and electrical conductive properties. B) looseness of outer electrons in metal atoms. C) relatively high densities of metals. D) high elasticity of metals. E) ability of metals to transfer energy easily.
Although Colombia is one of the top three oil and petroleum providers in Latin America, its involvement in the drug trade makes securing the oil problematic for the United States
a. True b. False Indicate whether the statement is true or false