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astro_101_review

# astro_101_review - PRACTICE QUESTIONS 1 Which of the...

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PRACTICE QUESTIONS 1. Which of the following statements about the sky is FALSE? a. A given star rises about 4 minutes earlier each night because of Earth's revolution about the Sun. b. As viewed from the equator, the North Star (Polaris) is on the northern horizon. c. From any given point on Earth, the entire celestial sphere is visible over the course of a year. a. The number of stars that are "circumpolar" (i.e., always above the horizon) is larger in Alaska than in California. 1. The Moon's angular diameter is roughly equal to that of a dime held at arm's length because a. . A. the Moon has the same physical diameter as the dime B. the ratio of the Moon's distance to the Moon's physical diameter is equal to the ratio of the arm's length to the dime's physical diameter.

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a. the ratio of the Moon's distance to the Moon's physical diameter is equal to the ratio of the dime's physical diameter to the arm's length. b. the Moon's angular diameter is inversely proportional to the square of its distance, and the Moon is much farther away than the dime.
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