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midterm2S09 - ASTRONOMY 100 Dr Nick Warner 5:00 pm March...

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1 ASTRONOMY 100 Dr. Nick Warner MIDTERM 2 ____________ 5:00 pm, March 10 th , 2009 SOLUTIONS AT END Exam Number Time Allowed: 1 hour _________________________ Name (Please Print) 1. The following are (incomplete) lists of some of the planets in the solar system. Which of them has the planets is the proper order as one goes out from the Sun. (Note: there may be gaps in the correct list) a) Venus, Earth, Mars, Neptune, Uranus b) Mercury, Earth, Venus, Mars, Jupiter c) Mercury, Earth, Mars, Saturn, Jupiter d) Venus, Mars, Earth, Jupiter, Neptune e) Mercury, Earth, Mars, Saturn, Neptune 2. Which combination of scientists observed random motion of pollen grains and then explained those random motions in terms of collisions of air molecules with the pollen grains? a) Galileo and Newton b) Bacon and Maxwell c) Brown and Einstein d) Proust and Dalton e) Maxwell and Planck 3. An absorption line spectrum looks like a) a continuous spectrum of all colors b) a continuous spectrum with dark lines in it where certain sharply defined colors appear to be missing c) a set of bright lines consisting of sharply defined colors with little or no light of other colors present d) the light from an optically pure laser e) the light from a black body radiator 4. The first radio telescope was constructed a) by Benjamin Franklin, in Pennsylvania in 1780 b) by James Clerk Maxwell, in Cambridge, England in 1873 c) by Heinrich Hertz in Karlsruhe, Germany in 1888 d) by Thomas Edison, in New Jersey in 1911 e) by Grote Reber, in his backyard in Illinois in 1936 5. In the nebular theory, the heat that powers a protostar comes from a) Kelvin-Helmholtz heating b) radioactivity c) thermonuclear fusion d) tidal effects e) heat retained from the Big Bang 6. The surface temperatures of planets in our solar system vary from 100K to 800K. Considered as black body radiators, in what part of the electromagnetic spectrum do these planets predominantly radiate? a) Ultra-violet b) Microwave c) Infra-red d) Visible e) Radio 7. Together, hydrogen and helium account for what percentage of the total mass of all matter in the universe? a) 2% b) 25% c) about 50% d) 98% e) 99.99%
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2 8. By studying the behavior of matter, it was shown that there is a special, universal temperature that became “absolute zero,” the zero of the Kelvin scale. Which of the following can be used to define that temperature? a) It is the temperature at which all gases have attained liquid form when subjected to 1 atmosphere of pressure. b) It is the temperature at which water freezes. c) It is the temperature at which helium boils. d) It is the temperature at which an “ideal gas” would occupy zero volume. e) It is the temperature of intergalactic matter. 9.
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midterm2S09 - ASTRONOMY 100 Dr Nick Warner 5:00 pm March...

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