Practice Exam 2 2009

Practice Exam 2 2009 - AST101 Section M001: Our Corner of...

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AST101 Section M001: Our Corner of the Universe Exam 2: October 22, 2009 Test Form A Answer all of the following questions on the bubble sheet provided using a #2 pencil. Make sure that your Name, Student ID Number and test form letter are on the answer sheet and that all answers are recorded in the correct position. ALWAYS SELECT THE BEST ANSWER. Each question is worth 1 point. This is a closed-book, closed-note exam and you have the duration of class to complete it. If you have questions, please raise your hand. You are not to talk to or attempt to obtain answers from other students for any reason. Be sure to write and bubble in your ID number and test form letter. DO NOT START THE EXAM UNTIL YOU ARE TOLD TO DO SO! 1
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Exam II AST101 Fall 2009 2 Choose the best answer from those provided. All questions are worth 1 point. 1. All of the following are steps in the scientific method except: (a) making observations. (b) proposing a model. (c) performing an experiment. (d) revising a model. (e) proving a model. 2. In Ptolemy’s Earth-centered model for the solar system, Venus’s phase is never full as viewed from Earth because it always lies between Earth and the Sun. In reality, as Galileo first recognized, Venus is (a) never full because the sunlit side of Venus never faces directly toward Earth. (b) never full because Earths shadow falls on Venus at the time when it would otherwise be full. (c) full whenever it lies directly between Earth and the Sun. (d) full whenever it is on the opposite side of the Sun from Earth, although we cannot see the full Venus because it is close to the Sun in the sky. 3. Kepler’s third law states that the relationship between orbital period and semi-major axis of the orbit of a planet is P 2 = a 3 . To use this equation for planets orbiting the Sun, P must be expressed in and a must be expressed in . (a) perihelions; aphelions. (b) days; kilometers. (c) years; kilometers. (d) days; astronomical units. (e) years; astronomical units. Use the drawing below to answer the next two questions. The planets in the orbits shown obey Kepler’s laws. A B C 4. Which of the planets orbits is most like the Earth’s orbit around the Sun? 5. Which of the planets shown would experience the greatest change in speed over the course of an orbit?
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Exam II AST101 Fall 2009 3 Use the drawing below to answer the next three questions. Assume that the three shaded areas labeled A, B and C are all the same size. A B C Direction of planet 6. During which part of the planets orbit (A, B or C) is the planet moving slowest . Answer D if you think that the planet is traveling at the same speed through all the portions of the motion (A, B and C). 7. During
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Practice Exam 2 2009 - AST101 Section M001: Our Corner of...

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