quiz4.docx - Astronomy 100 Week 4 Quiz 1 Why are there more low mass stars than high mass stars a High mass stars live longer b Low mass stars dominate

quiz4.docx - Astronomy 100 Week 4 Quiz 1 Why are there more...

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Astronomy 100, Week 4 Quiz. 1.Why are there more low mass stars than high mass stars? a.Highmassstarslivelonger.b.Lowmassstarsdominateourneighborhood.c. Theyrequirelessmasstoform.d. They were born first. 2. Why do we suspect that the star "Vega" is a very young star? a. Vega is one of the brightest stars in the sky. b. Radio waves from around Vega show lots of dust, typical of young stars. c. Vega has no heavy elements in its composition. d. Astronomers use radioactive dating, showing Vega is about one hundred million years old. 3.Which of these is the best place to find large complicated molecules? a.Insidecloudsofdust.b.Insidethelargerstars.c.Insidethesun.d. Distributed evenly throughout the galaxy. 4.Dust clouds in space have low density so why are they so effective atblockinglight? a.Theparticlesareverylarge.b. The particles are shaped like little needles that line up along magneticfieldlines.c. The particles are resonant with light because they are of similar size tothewavelengths.d. The dust surrounds stars. 5. Why are certain areas of our galactic disk darker than others? a. Some areas are hidden by comets.
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