Which is used to estimate how much oil in the ground can be extracted at a profit?
A. proven oil reserves
B. speculation
C. unproven oil reserves
D. oil banks
Answer: A
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Today, the less-developed countries have ________.
A. high death rates and low birthrates B. high death rates and high birthrates C. low death rates and high birthrates D. low death rates and low birthrates
What kinds of rocks were most commonly retrieved from the lunar highlands?
A) Flood basalts B) Granite C) Anorthosite D) Frozen hydrogen
_____ became the dominant reef-builders in the Cenozoic seas
A)Rudists B)Mollusks C)Corals D)Crinoids E)Brachiopods
Air masses that are lifted cool down primarily by ________, that changes from "dry" to "wet" as clouds form.
A. adiabatic lapse rate B. stratospheric processes C. anaerobic lapse rate D. radiational processes E. convective lapse rate