What is the average period of time that elapses between flood events of similar size?
A. recurrence interval
B. discharge interval
C. one year
D. flood stage
Answer: A
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Which of the following best describes how far the Moon is from Earth and the Sun?
a. The Moon is much closer to the Sun that it is to the Earth b. The Moon is much closer to the Earth than it is to the Sun c. The Moon is closer to either Earth or the Sun depending on the time of year d. The Moon is about the same distance from Earth as it is from the Sun
Evaporites, formed from ___________, are important economically because they are often found at or above 97% purity and are __________.
A. igneous rocks; important due to their strength, lightness, and malleability B. metamorphic rocks; important due to their strength, lightness, and malleability C. sedimentary rocks; important due to their strength, lightness, and malleability D. igneous rocks; therefore concentrated in economically recoverable levels E. sedimentary rocks; therefore concentrated in economically recoverable levels
The passage of magma up through the lithosphere may be traced by the shallow earthquake focal depths over time.
Answer the following statement true (T) or false (F)
What was the central idea of Thomas Malthus?
A) Laws often target poorer people. B) Cities develop before central governments. C) Emigration alleviates population pressure on a region. D) Population growth will outstrip the food supply. E) Population doubling rates are impossible to calculate.