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ASTR 1110 Exam 1 questions & answers

# ASTR 1110 Exam 1 questions & answers - ASTR 1110-001...

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______________________________ ASTR 1110-001 Last name First name Dr. Hornstein Spring 2008 _____________________________ Student Number Version 1111 FIRST EXAM 8 Feb 2008 Closed books, no calculators, phones, etc. You may use one sheet (8.5" x 11") of handwritten notes. Strictly individual effort, 45 minutes maximum. DO NOT USE YOUR PHONE/IPOD/ETC FOR ANY REASON DURING THE TEST. Write your name and student ID on this page and on the essay on the last page. Also, write and BUBBLE in your name and student ID on the scantron sheet using a #2 pencil. Enter the test form version (number underlined above) on the top left of the scantron sheet. 110points total. Since the scantron forms will not be returned, you may want to record your answers on this test. You WILL get this copy back. Solutions will be posted on CULearn this evening. Monday's class will have clicker questions based on the concepts behind some of the harder questions. TRUE/FALSE. Mark (a) T, or (b) F on scantron sheet based on each statement. [2 pts each] 1)Scientific theories can never be proven true beyond all doubt. Answer: True False 2)At noon on the summer solstice, the Sun is at your zenith as long as you are in the northern hemisphere. Answer: True False 3)You can find the tilt of the Earth's axis by measuring the angle between your horizon and the North Star. Answer: True False 4)If the Earth was tilted by more than 23.5o, our seasons would be different than they are now. Answer: True False 5)Order of magnitude astronomy refers to the concept that when dealing with very large numbers we often only care if we have the right units. Answer: True False MULTIPLE CHOICE. Mark scantron with the choice that BEST completes the statement or answers the question. [3 pts each] 6)Suppose an asteroid orbits the Sun on a highly eccentric orbit with an average (semi-major axis) distance of 1 AU. How long does the asteroid take to complete each orbit, and how do we know? A)Each orbit should take much longer than 1 year, because the eccentricity is so large. B)1 year, which we know from Kepler's third law. C)It depends on the eccentricity of the orbit, as described by Kepler's second law. D)It depends on the eccentricity of the orbit, as described by Kepler's first law. E)We have no way of knowing without knowing the size of the asteroid. Answer: B 7)What is the ecliptic plane?

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ASTR 1110 Exam 1 questions & answers - ASTR 1110-001...

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