The place within the Earth where rock ruptures and slips, or the place where an explosion occurs, is called:
a. Earthquake epicenter
b. Earthquake focus
c. Earthquake hypocenter
d. Earthquake trace
e. Both b and c
Answer: e. Both b and c
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Given the following time frames for an energy source to be renewed, which one is nonrenewable?
A. coal: 10 million years B. solar energy: 0 hours (except at night) C. switchgrass: 3 months D. trees: 50 years
If you mix a typical aluminum ion (Al, atomic no. = 13) with a typical oxygen ion (O, atomic no. = 8), what compound is formed?
A. Al2O2 B. Al3O C. Al3O2 D. Al13O8 E. Al2O3
Which of the following molecules has the highest boiling point?
A. NH3 B. BH3 C. CH4 D. All of the above should have the same boiling point.
Which of the following is NOT an essential component of sustainable development?
A. Increasing reliance on renewable resources B. A marked decrease in military spending C. Low birth and death rates D. A broader sharing of the benefits of development E. All of these are components of sustainable development