ANSWERS_SAMPLEexam2

ANSWERS_SAMPLEexam2 - Astronomy 31 Exam #2 Makeup Name _...

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Astronomy 31 Name ________________________ Honor Pledge ___________ Exam #2 Makeup (Initial) Prof. Christiansen TRUE-FALSE (6 points) 1. ___T__ Spectral Type, Surface Temperature, and Color are all related to each other and describe the same general characteristic of a star. 2. ___F__ We can measure the parallax for any star in our galaxy. 3. ___T__ Two stars have the same Spectral Type but Star A is Luminosity Class III while Star B is Luminosity Class V. Therefore, Star A has a LARGER radius than Star B. 4. ___F__ Stars with low mass can’t possibly last as long as stars with high mass. 5. ___F__ Visible light can’t escape from a Black Hole but gamma rays, and neutrinos can. 6. __T___ The gas-star-gas cycle cannot last forever. MULTIPLE CHOICE (13 points) For the next 6 questions use the following set of answers . A) upper right B) lower right C) upper left D) lower left 7. ___D__ On the H-R Diagram where do you find stars that are HOT AND DIM? 8. ___C__ On the H-R Diagram where do you find stars that are HOT AND LUMINOUS? 9. ___A__ On the H-R Diagram where do you find stars that are COOL AND LUMINOUS? 10. ___B__ On the H-R Diagram where do you find stars that are COOL AND DIM? 11. ___A__ On the H-R Diagram where do you find RED SUPER GIANTS? 12. __D___ On the H-R Diagram where do you find WHITE DWARFS?
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13. ___C__ On the Main Sequence, stars obtain their energy from A) chemical reactions B) nuclear fission of Uranium C) nuclear fusion of Hydrogen to Helium D) nuclear fusion of Helium to Carbon E) nuclear fission of Iron to Silicon F) gravitational contraction 14. __B___ What is happening when a star leaves the Main Sequence and moves toward becoming a Red Giant? A) The core expands and heats up while the surface expands and cools
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This note was uploaded on 03/28/2008 for the course ASTR 101 taught by Professor Christiansen during the Spring '08 term at UNC.

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ANSWERS_SAMPLEexam2 - Astronomy 31 Exam #2 Makeup Name _...

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