In the process of scientific inquiry, a theory is best defined as:
A) a "best guess" that may explain how something works, but is as yet untested and unproven.
B) the initial formulation of an idea based on a few observed facts.
C) a hypothesis that has been extensively tested and is generally accepted by the scientific community.
D) a final solution to a scientific problem that is proven correct and will never be disproven.
C
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The ability to detect mesocyclones using Doppler radar
A) reduces the risk of damage of stepped leaders. B) allows meteorologists to predict where and when cumulonimbus clouds may form. C) gives meteorologists the opportunity to change the direction of the rotation. D) allows meteorologists to issue tornado warnings before tornados form.
What is a result when birth rates and death rates reach equal numbers?
A) biocapacity B) changing demography C) demographic transition D) zero population growth E) baby boom
Which numbered feature(s) on this photograph are consistent with the presence of glaciers sometime in the past?
A. 2, U-shaped valley B. 1, an arête C. 3, tarn D. All of these choices are correct.
The initial hypoxic insult associated with a drowning occurs from:
A) apnea. B) lung injury. C) pulmonary edema. D) surfactant damage.