The volcanic explosivity index (VEI) is intended to:
a. describe the frequency of volcanoes.
b. be used to forecast eruptions.
c. prevent fatalities and property damage.
d. document the size of eruptions.
e. encourage people not to live near active volcanoes.
D
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The early Paleozoic history of continents involves ____
a. widespread glaciation b. stable plate positions c. mountain building and marine transitions/regression. d. extensive volcanism e. subduction and emplacement of batholiths
What does fetch refer to in terms of ocean waves?
a. wind velocity b. length of time wind blows over the water c. the distance that wind blows over open water d. a command given to a seagoing canine e. the maximum energy that the waves can absorb
How many micrograms (mg) are there in 1 milligram (mg)?
A) 1 x 10^- 6 B) 1 x 10^-3 C) 1 x 10^3 D) 1 x 10^6
Negative feedback is an "unnatural process" that is generally detrimental to the functioning of an environmental system
a. True b. False Indicate whether the statement is true or false