A_Quiz06(Fa07)

A_Quiz06(Fa07) - SURVEY OF ASTRONOMY 806243 Quiz Score: /10...

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S URVEY OF A STRONOMY 806–243 Name: _________________________ Quiz Score: /10 = _______% Section: _________________________ ASTRONOMY 806-243 QUIZ 6 ________ 1. Compared to the present structure of the Sun, when it becomes a red giant its core will be denser and cooler and its surface will be less dense and hotter. a) True b) False ________ 2. Which star has the shortest main sequence lifetime? a) An 0.5 solar mass star b) An 1 solar mass star c) A 25 solar mass star d) All stars have the same main sequence lifetime. ________ 3. Which of the following statements about the interstellar medium is not true? a) Dust constitutes about 1% of the interstellar medium. b) Nebulae are clouds of gas and dust. c) Helium gas constitutes about 90% of the interstellar medium. d) Giant Molecular clouds and dark nebulae are ideal sites for star formation. e) The Eagle Nebula is a site of current star formation. ________ 4.
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A_Quiz06(Fa07) - SURVEY OF ASTRONOMY 806243 Quiz Score: /10...

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