Test1v2Soln

Test1v2Soln - ASTR 2003-Survey of the Universe Test no.1...

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A STR 2003-Survey of the Universe Test no.1 – The Solar System February 15, 2011 Answer all of the following 50 questions on a blue letter sized scantron “General Purpose Scantron Answer Sheet form no. 4521” using a #2 pencil. Make sure that your Full Name and Student ID Number are on the answer sheet and that all answers are recorded in the correct position. Each question is worth 1 point. This is a closed-book, closed-note exam and you have approximately 80 minutes to complete it. Afterwards hand in your scantron with your answers and take this test home with you. You may (optionally) return another completed scantron to class on Thursday after retaking the test at home using your books and notes. Your final score will be the average of the test and retest (or the test alone if that is greater). Q. 1. Which of these is NOT a measure of distance? (a) light year (ly) (b) parsec (pc) ( c) parallax (px) (d) astronomical unit (AU) Q. 2. Which planet of those listed below has the slowest orbital velocity? (a) Venus (b) Neptune (c) Mars (d) Earth Q. 3. If you (somehow) took Pluto and put it in orbit around the Sun at the current orbital radius of the Earth, what orbital velocity would you have to give it for it to stay in orbit? (a) the current orbital velocity of Pluto (b) the current orbital velocity of Earth (c) some other velocity that depends on the mass of Pluto and the orbital radius (d) half the current orbital velocity of the Earth Q. 4. At the summer solstice in the northern hemisphere, the Sun (a) reaches its highest angle in the sky of the year. (b) is at its lowest angle above the southern horizon at midday of the year. (c) is on the celestial equator. (d) is nearest to the Earth. Q. 5. Mars moves in an elliptical orbit around the Sun, with the Sun ____________. (a) at the exact center of the ellipse. (b) at the focus that is closer to the point where Mars moves the fastest. (c) at one end of the major axis of the ellipse. (d) at the focus that is closer to the point where Mars is moving the slowest. Q. 6. Which of the following four objects or persons is NOT accelerating? (a) A bicyclist gradually slowing down on a straight road while coasting toward a stop sign (b) A motorcyclist traveling around a circular racetrack at a constant speed (c) An apple falling to the ground from an apple tree (d) An Olympic swimmer exerting considerable force to maintain a constant speed in a straight line through the water Q. 7. Newton's second law of motion states that (a) a force is always required in order to keep an object in motion. (b) a body acted upon by a net force will accelerate constantly while the force is applied. (c) objects orbiting the Sun always move in elliptical orbits. (d) a body acted upon by a force will move at a
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Test1v2Soln - ASTR 2003-Survey of the Universe Test no.1...

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