Which of the following is the stannous ion?
A) Sn+
B) Sn2+
C) Sn3+
D) Sn4+
B
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Which of the following best describes a seismic gap?
A) Unusually quiet zones along typically active faults B) A downdropped valley bound by normal faults C) Faults that have not been active for several million years D) An erosional valley that has developed in an inactive fault
Which of the following hurricanes was the most costly hurricane ever to hit North America?
A. Camille B. Andrew C. Katrina D. Sandy
An example of basic research is
A) the development of new plastics that can be recycled. B) the study of the relationship between the amount of automobile emissions gases in the atmosphere and the decomposition of atmospheric ozone. C) the study of the composition of the atom. D) the design of new batteries for electric cars. E) the study of natural compounds in sea animals to look for new molecules that can be used for medicine.
This volcano is relatively small and composed of volcanic cinders. What kind of volcano is it?
A. scoria cone B. caldera C. shield volcano D. volcanic dome E. composite volcano