Download 17 MCQs for Assignment 1 - Astronomy I | ASTR 1010 and more Assignments Astronomy in PDF only on Docsity! Astronomy I (Astr 1010) Spring 2010 Prof Richard Ignace HOMEWORK #1 Notes: You will need a calculator, a pencil, and a standard scantron. Each question has one correct answer. Choose the best answer for each. Mark your answer on the scantron. This homework is due at the beginning of class on February 9. Late homeworks will not be accepted. 1. Aristotle inferred that a) the Earth is spherical because the Earth’s shadow is always a stripe across the Moon. b) the Earth is spherical because different constellations could be seen from different latitudes. c) the Earth is flat because the Earth’s shadow is always curved across the Moon. d) the Earth is flat because different constellations could be seen from different latitudes. 2. Where on Earth would you be if Polaris was at your zenith? a) North Pole b) South Pole c) Tropic of Cancer d) Equator e) It lies overhead everywhere on Earth 3. What curve on the celestial sphere is created by our revolution around the Sun? a) Equator b) Prime Meridian c) Analemma d) Ecliptic e) Galactic Plane 1 4. An order of magnitude problem, about how many stars are visible to the unaided eye on a clear night from a dark sight? a) dozens b) hundreds c) thousands d) millions e) billions 5. What Greek composed a model of the Earth-Moon-Sun system that most closely resembles our modern model? a) Pythagoras b) Hipparchus c) Ptolemy d) Erastothenes e) Aristarchus 6. Uranus’ orbit is about 19 AU. What is its orbital period in years? a) 19 years b) 13 years c) 83 years d) 7 years e) 29 years 7. The force of gravity between two objects a) increases with the masses, but decreases with their separation. b) increases with the masses, but decreases with the square of their separation. c) increases with the cube of their masses, but decreases with their separation. d) decreases with the masses, and decreases with their separation. e) decreases with the masses, but increases with the square of their separation. 8. There is a force of gravity from the Earth acting on you. a) This force is bigger than the force of gravity acting on the Earth because of you. b) This force is smaller than the force of gravity acting on the Earth because of you. c) There is no force of gravity acting on the Earth because of you. d) This force is equal to the force of gravity acting on the Earth because of you. 9. What is 43,040 in scientific notation? a) 4.304× 103 b) 4.304× 104 c) 4.304× 105 d) 43.04× 103 e) 43.04× 104 2
