14) What conditions are required for a lunar eclipse? A) The phase of the Moon c
ID: 231326 • Letter: 1
Question
14) What conditions are required for a lunar eclipse? A) The phase of the Moon can be new or full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. B) The phase of the Moon must be full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. C) The phase of the Moon must be full, and the Moon's orbital plane must lie in the ecliptic. D) The phase of the Moon must be new, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. E) The phase of the Moon must be new, and the Moon's orbital plane must lie in the ecliptic.
15) What happens during the apparent retrograde motion of a planet? A) The planet moves backward through the sky. B) The planet appears to move eastward with respect to the stars over a period of many nights. C) The planet moves through constellations that are not part of the zodiac. D) The planet moves backward in its orbit around the Sun. E) The planet rises in the west and sets in the east.
16) What causes the apparent retrograde motion of the planets? A) As Earth passes another planet, the other planet appears to move backward with respect to the background stars, but the planet's motion does not really change. B) When planets are farther from the Sun, they move slower than when they are nearer the Sun; it is during this slower period that they appear to move backwards. C) The other planets never really appear to move backward; the background stars shift due to Earth's revolution around the Sun. D) Apparent retrograde motion is an illusion created by turbulence in Earth's atmosphere. E) As Earth passes another planet, its gravitational pull slows down the other planet so that it appears to be traveling backward.
17) Which of the following never goes in retrograde motion? A) Jupiter B) Mars C) Saturn D) the Sun E) Venus
18) Which of the following statements about parallax is not true? A) Ancient astronomers were unable to measure parallax and used the absence of observed parallax as an argument in favor of an Earth-centered universe. B) The existence of stellar parallax is direct proof that Earth orbits the Sun. C) Measurement of stellar parallax allows us to determine distances to nearby stars. D) You can demonstrate parallax simply by holding up a finger and looking at it alternately from your left and right eyes. E) The technique of stellar parallax was used by Hubble to determine that the Andromeda Galaxy (M 31) is about 2 million light-years away.
19) Has Polaris always been the "North Star"? A) Yes, because the stars are unchanging. B) No, because the Milky Way blocked our line of site to it for a long time. C) No, because it is a young star that only formed a few hundred years ago. D) No, because the Earth's axis slowly changes the direction it points
Explanation / Answer
14. B
15. B
16.A
17.E
18.E
19.D
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.