exam2t - Section 1 Astronomy 150 Midterm Test Form A Fall...

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Section 1 Astronomy 150 Fall 2009 Midterm Test Form A 1. DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO. 2. Write the multiple-choice answers on your Scantron form. 3. Make sure to mark your test form, name, and NetID on your form. I do not need anything else. 4. Answer ALL of the questions. There is no penalty for guessing. 5. Don't get stalled on any one question. 6. Choose the best answer for each problem.
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Version A Astro 150: Exam 2 Version A Page 2 1. Which of the following stars will supernova and turn into a neutron star? A) 0.5 solar mass B) 5 solar mass C) 100 solar mass D) 1 solar mass E) 10 solar mass 2. CMEs happen about once per week on average. Why isn't the power grid in danger every week? A) Most just make pretty aurora. B) Most are dead inside. C) Most don't hit the Earth. D) Most don't have strong enough magnetic fields. E) Most don't have enough mass. 3. What does the spectra of the Sun look like? A) A few discrete colors, which depend upon the gas. B) We don’t know. We can’t observe the Sun; it's too bright. C) A continuous rainbow of color. D) A continuous rainbow of color with some colors reduced in brightness (look dark) due to the specific elements in the gas. E) A continuous rainbow of color with a few discrete colors brighter than the rest. 4. What causes sunspots? A) Differences in the temperature of the surface of the Sun due to differences in the rate of spin. B) Magnetic field lines popping through the Sun's surface. C) GRBs. D) These things happen in young stars. They will clear with time. E) Comet impacts on the Sun. 5. Right before a supernova, what is happening to the core? A) Nothing. B) Collapsing at 10% the speed of light. C) Burning silicon into iron. D) Collapsing into a white dwarf. E) Collapsing into a supernova. 6. What is a planetary nebula? A) A molecular cloud clump that will likely form a planetary system. B) The glowing remains of a high-mass star. It is the outer envelope that is cast off right before a supernova. C) The remains of a disk around a planet. A good example would be the rings around Saturn. D) A round nebula that formed when the planets formed from dense gas in the Solar System. E) The glowing remains of a low-mass star. It is the envelope that is cast off as a low-mass star turns into a white dwarf.
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Version A Astro 150: Exam 2 Version A Page 3 7. Gamma Ray Bursts were first detected A) by looking at supernova explosions.
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exam2t - Section 1 Astronomy 150 Midterm Test Form A Fall...

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