Why is the inner core expanding?
A) crystallization
B) vaporization
C) melting
D) condensation
Answer: A
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Principle factors that come into play when volcanism affects climate include all but which of the following?
A. the size and rate of eruptions B. the latitude of the eruptions C. the heights of eruption columns D. the types of gases and the atmospheric level at which they are placed E. the isotopic ratio of oxygen gas (O2) emitted during eruptions
What is the consensus that the Earth has a carrying capacity of 7 billion people (which is our current population)?
A. There is no consensus. B. Experts agree that we have exceeded the carrying capacity and face a dieback. C. Experts agree that continued economic growth can provide resources for tens of billions more. D. Experts agree that with 7 billion people, we are close to the carrying capacity.
A smog front is most often associated with which of the following wind systems?
A. Santa Ana B. sea breeze C. chinook D. monsoon
Eolian saltation typically ____
a. carries the heaviest part of the bed load b. is the most effective kind of eolian erosion c. transports silts and clays d. makes sand bounce in the downwind direction