mt2 - AST10G Midterm Exam 2 Version A DO NOT OPEN THE EXAM...

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AST10G Midterm Exam 2 Version A DO NOT OPEN THE EXAM UNTIL INSTRUCTED. Write your name, Student ID, and Exam Version on your Scantron and on this cover sheet. For short-answer questions, write your answer on pages 1-4. For multiple-choice, enter the best answer on the scantron (also circle the answer on the exam if you want to make your corrections easier). Turn in your scantron and short-answer pages at the end of the exam. During the exam: If you find any multiple-choice question ambiguous or poorly worded, use the end of the short-answer area to indicate the question number, the answer you entered on the scantron, and why it was ambiguous. If you convince me you know what you are talking about, you will get credit regardless of the scantron answer. Please exercise this option only for truly ambiguous questions. After the exam: instructions for the corrections are now on the question pages you take home with you. Do not forget to write your name on the scantron AND on the cover page with the short answers. If you turn in corrections, do not forget to write your name on the work you turn in. Good luck! 1
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This page and the next two have space for short answers. The questions are at the end of the multiple- choice questions. 2
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More space for short answers. 3
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More space for short answers. 4
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Multiple-choice questions: 1 point each, 23 total. The following five questions refer to three hypothetical stars born at the same time: Star A will be a main sequence star for 45 billion years; Star B will be a main sequence star for 200 million years; and Star C will be a main sequence star for 2 million years. You will be asked to rank their properties as they are on the main sequence. Do not consider other stages unless explicitly asked to. For each ranking question, use these choices: a. A > B > C b. C > B > A c. A=B=C d. None of the above e. Not enough information to rank them 1. Rank the masses of the stars. 2. Rank their luminosities. 3. Rank their surface temperature. 4. Rank their sizes (radii). 5. What are the eventual fates of stars A and C? a. Star A will become a black hole or neutron star. Star C will become a white dwarf. b. Star A will become a supernova remnant. Star C will become a brown dwarf. c. Star A will become a brown dwarf. Star C will become a pulsar. d. None of the above. e. Not enough information to determine.
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This note was uploaded on 02/16/2010 for the course BIS 34957 taught by Professor Britt during the Spring '10 term at UC Davis.

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mt2 - AST10G Midterm Exam 2 Version A DO NOT OPEN THE EXAM...

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