Rows in the Periodic Table correspond to 
A. the number of neutrons in the nucleus.
B. the number of protons in the nucleus.
C. the atomic weight.
D. the number of electron shells.
E. All of these choices are correct.
Answer: D
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Which of the following is the most often recycled plastic?
a. PET b. HDPE c. PVC d. LDPE e. Styrofoam
The predominant religion in Latin America is
A) Islam. B) Catholicism. C) Protestantism. D) Animism. E) Eastern Orthodoxy.
At the current rates of use, the United States has enough coal to last the next
A) 20 years. B) 40 years. C) 100 years. D) several centuries.
Why are high-protein cereals a successful approach to expansion of food production?
A) They represent an extremely cheap way to produce more food. B) They require little to no water as compared to standard crops. C) They can be grown anywhere. D) Individual food habits do not necessarily have to be altered. E) They often replace cash crops.