Most of the approximately 3,300 historic eruptions lasted:a
less than one month.
b. one to six months.
c. one to two years.
d. more than two years.
e. none of these
A
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Which kind of trait is needed by members of a population that are able to survive when environmental conditions change and, in doing so, alter the makeup of that population over time?
A. genetic B. personality C. character D. innate
Although greenhouse gas concentration has increased steadily over the last century (see Figure 24-1), based on your answers for questions 3 and 4, is increased greenhouse effect likely to be the only factor influencing temperature change in these cities? Why?
The question is based on Figure 24-6, a chart showing average annual temperature from 1905 to 2015 in three U.S. cities: Nome, Alaska; Bozeman, Montana; and Tucson, Arizona.
Your friend shows you a purple-colored mineral sample he recently found while walking the beach. He claims that it must be quartz, because the color matches that of another quartz sample he saw in a museum. Do you think his identification is accurate?
A. Yes; the mineral quartz is almost always the color purple. B. Maybe; further tests must be done to positively identify the mineral, since quartz can come in many different colors. C. No; the mineral quartz is never purple.
Which of the following tropical rain forest regions has seen the greatest forest loss?
A) Indonesia B) South America C) Central America D) Africa E) Southeast Asia