What is meant by Occam's Razor?
A) a well-designed experiment that clearly shows the differences between two competing theories
B) a poorly designed experiment that fails to show the difference between two competing theories
C) the idea that scientists should prefer the simpler of two models that agree equally well with observations
D) the fine line between science and pseudoscience
E) the shaving implement of a medieval scholar
C
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Because protostars are at a low temperature and surrounded by dust and gas, astronomers must observe them with ________.
A. ultraviolet telescopes B. gamma ray telescopes C. radar D. infrared and radio telescopes
Which geometrical shape has the least surface area for a given volume?
A) cube B) pyramid C) cylinder D) sphere E) none of the above
Carbon-14 dating can be used to find the age of material up to ____________ of years old
a. millions c. hundreds of thousands b. billions d. tens of thousands
The _____ is a band centered on the ecliptic and encircling the sky
A) nadir B) zodiac C) horizon D) zenith