Edmonds Community College ASTRONOMY 100 Sample Test #2 Fall Quarter 2006

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1 Edmonds Community College ASTRONOMY 100 Sample Test #2 Fall Quarter 2006 Instructor: L. M. Khandro 10/19/06 Please Note: the following test derives from a course and text that covers the entire topic of astronomy at the 100 level. This is not the case for our class, which covers more of the solar system than does a full astronomy course. Therefore your second test will have questions that are like these in topic, but that may ask for more detail in any given topic. That test is not prepared at this time, thus I cannot tell you exactly where that detail will show up. I still recommend doing the chapter questions in order to more fully understand the content of our text. 1. Which planet is most similar to Neptune in size: a. Mars c. Saturn b. Jupiter d. Uranus 2. Which of these planets has the most known moons? a. Mars c. Uranus b. Saturn d. Neptune 3. Which of the following is a moon of Saturn? a. Europa c. Mimas b. Triton d. Miranda 4. Which planet has the Great Red Spot? a. Jupiter c. Mercury b. Saturn d. Mars 5. Which of the following is a satellite of Jupiter? a. Viking c. Phobos b. Galileo d. Io 6. The existence of Neptune was proposed: a. on the basis of photographs c. because of its effect on Uranus's orbit b. because of its effect on Pluto's orbit d. based on Bode's Law 7. Jupiter's chemical composition is most similar to which? a. the Sun c. Pluto b. Earth d. Earth's Moon 8. Which of the following statements is true of all the planets a. they rotate on their axes and revolve around the Sun b. they rotate in the same direction c. they have at least one moon d. their axes point toward Polaris (the North Star) 1

2 9. Which of the following lists these planets from smallest to largest? a. Mars, Mercury, Earth, Uranus c. Mercury, Mars, Earth, Uranus b. Mercury, Uranus, Mars, Earth d. Uranus, Earth, Mars, Mercury 10. Compared to Jovian planets, terrestrial planets have a: a. more rocky composition c. more rapid rotation b. lower density d. larger size 11. In which of the following ways is Venus most like Earth? a. in its period of rotation c. in the length of its day b. in its average surface temperature d. in its average density 12. When we see Venus in the sky, the light we receive is sunlight reflecting from its: a. oceans c. solid surface b. clouds d. core 13. The fact that Venus has little or no magnetic field is attributed to its: a. slow rotation c. proximity to Earth b. cloud cover d. proximity to the Sun 14. The Martian polar caps are: a. all water ice c. water and carbon dioxide ice b. all carbon dioxide ice d. water and methane ice 15. List the terrestrial planets in order of increasing atmospheric pressure at the surface: a. Mercury, Venus, Earth, Mars c. Earth, Mercury, Mars, Venus b. Venus, Mercury, Earth, Mars d. Mercury, Mars, Earth, Venus 16. List these planets from most massive to least massive: a. Jupiter, Saturn, Uranus c. Uranus, Saturn, Jupiter b. Saturn, Jupiter, Uranus d. Uranus, Jupiter, Saturn 17. Differential rotation in a planet means: a. it changes speed when orbiting the Sun b. it changes its rate of rotation from time to time c. different parts of it have different rotation periods d. its moons rotate in different directions 18. Most of the extra energy that Jupiter emits may be energy: a. left over from its formation b. resulting from radioactive materials within it c. resulting from the greenhouse effect d. due to its rotating storms 19. Saturn's rings are: a. composed of icy particles c. within its Roche limit 2

3 b. in the plane of its equator d. all of these 20. Saturn is unique in that it a. is the only planet with rings b. is the brightest planet in the sky c. is the only Jovian planet with more than 4 moons d. has the lowest density of all the planets 21. A "shooting star" or "falling star" is a: a. star moving at great speed c. planet falling out of orbit b. comet nearing the Sun d. meteor 22. A Nucleus, Coma, Dust Tail and Ion Tail are parts of a: a. meteor c. comet b. meteorite d. satellite 23. Which planet was discovered in this century? a. Mars c. Pluto b. Mercury d. Jupiter 24. Uranus is unique in that it has: a. the least density of all the planets b. its poles point nearly toward the Sun at some times c. it is the most distant of the Jovian planets d. it has a more eccentric orbit than any other planet 25. Which of the following best describes comet orbits? a. circular, lying in the plane of the ecliptic b. lying between Mar's and Jupiter's orbits c. very eccentric ellipses, from outside Pluto's orbit d. within the orbit of Mercury 26. Most asteroids orbit the Sun between: a. Earth and Mars c. Jupiter and Saturn b. Mars and Jupiter d. Saturn and Uranus 27. At greater distance from the surface of a planet, the escape velocity from that planet: a. becomes less b. becomes greater c. remains the same 28. The Earth's atmosphere is made up of about: a. 80% oxygen and 20% nitrogen c. 20% oxygen and 80% nitrogen b. 50% oxygen and 80% nitrogen d. 10% oxygen and no nitrogen 29. The surface of Mercury most resembles which object: a. Mars c. Earth 3

4 b. Venus d. Earth's Moon 30. Which planet is most massive? a. Mercury c. Earth b. Mars d. Saturn 31. The only planet whose orbit is more eccentric than Mercury: a. Saturn c. Pluto b. Earth d. Neptune 32. Which planet has rings? a. Uranus c. Earth b. Mars d. Mercury 33. Which planet has the least atmosphere? a. Mercury c. Venus b. Mars d. Earth 34. Which planet has its plane of rotation tilted most with respect to its plane of revolution? a. Earth c. Uranus b. Mercury d. Neptune 35. Which of these planets is closest to the Sun? a. Pluto c. Mars b. Neptune d. Earth 36. Olympus Mons is a: a. moon of Mars c. mountain on Mars b. moon of Venus d. asteroid 37. Rings around Uranus were discovered by: a. photographs from orbiting spacecraft b. observations of stellar occultation c. theoretical predictions d. no one, since no rings have been found around Uranus 38. A meteor is caused by: a. a star falling to Earth c. a distant nebula b. a comet streaking across the sky d. a particle falling into the atmosphere 39. Which of the following is the largest asteroid? a. Ceres c. Callisto b. Europa d. Ganymede 40. The search for Pluto was undertaken based on: a. Bode's Law c. perturbations in asteroid orbits b. perturbations of Uranus' orbit d. Kepler's 1st Law 4

5 41. A comet's tail: a. follows its head through space c. is closer to the Sun than its head is b. is farther from the Sun than its head is d. precedes its head through space 42. Short period comets are thought to be: a. permanent parts of the inner solar system, like asteroids b. formed when orbits of long period orbits are changed c. formed in the inner solar system then ejected into space d. none of the above 43. The most well-preserved meteor crater on Earth is: a. Meteor Crater in Arizona c. Tunguska crater in Siberia b. Hudson Crater in Canada d. Crater Copernicus in Denmark 44. Why do most meteoroids not reach Earth s surface? a. they bounce off the atmosphere and go back into space b. they burn up in the atmosphere c. they are light enough that they stay suspended in air d. they land in the ocean 45. A particle entering Earth's atmosphere and surviving to reach the ground is called a: a. meteor c. meteorite b. meteoroid d. none of these 46. Pluto's mass has been calculated from: a. Charon's orbit c. its effect on passing asteroids b. passing spacecraft d. none of these 47. The most abundant element of Jupiter's atmosphere is: a. helium c. sulfuric acid b. hydrogen d. ammonia 48. The Great Red Spot is a: a. continent c. storm b. zit d. mountain 49. Which of the following is true of Jovian planets? a. they have low average densities compared to terrestrials b. their orbits are closer to the Sun than asteroids c. they have craters in old, rocky surfaces d. they have smaller diameters than terrestrials 50. The greenhouse effect heats a planet because: a. more sunlight strikes the planet's surface than normal b. the surface of the planet is darker than normal c. infrared radiation is trapped by the planet's atmosphere 5

6 d. cloud cover prevents visible light from striking it 6

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