Astronomy HW & EXAM 2

Astronomy HW & EXAM 2 - Homework/Exam 2, PHYS 101Y...

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Homework/Exam 2, PHYS 101Y (Instructor: Igor Shovkovy) Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The orbits of most comets 1) A) lie almost entirely beyond the orbit of Neptune. B) are smaller than the orbit of Comet Halley, with a 76 - year period. C) are open, going out into interstellar space, and thus never return. D) have aphelions in the Kuiper belt. E) have perihelions inside the orbit of Mercury. Answer: A TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 2) The bright photosphere is much hotter than the faint corona. 2) Answer: True False MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 3) Planetary orbits 3) A) are evenly spaced throughout the solar system. B) are highly inclined to the ecliptic. C) are almost circular, with low eccentricities. D) are spaced more closely together as they get further from the Sun. E) have the Sun at their exact center. Answer: C 4) The Trojan asteroids are found 4) A) with the others, between Mars and Jupiter; their red color gives them their name. B) sixty degrees ahead or behind Jupiter, sharing its orbit about the Sun. C) orbiting around the Kuiper Belt body Hector. D) beyond Neptune, with orbits similar to Pluto's. E) closer on average to the Sun than is the earth. Answer: B 5) Which of the following have an icy composition? 5) A) most comets and the rings of Saturn B) meteorites and most asteroids C) meteoroids D) most asteroids E) the surface of Mars Answer: A TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 6) All the terrestrial planets lie inside the asteroid belt. 6) Answer: True False 1
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Homework/Exam 2, PHYS 101Y (Instructor: Igor Shovkovy) Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 7) Sunspots are dark splotches on the Sun. Which statement is true? 7) A) They are solid bodies floating on the surface of the Sun. B) They are extremely cold objects, as cold as Pluto. C) They are hotter than the surrounding areas of the Sun. D) They are associated with areas of very low magnetic fields. E) They are extremely hot, but cooler than the surrounding areas of the Sun. Answer: E 8) A meteor is 8) A) a chunk of space debris orbiting the Earth. B) an irregularly shaped body, mostly found orbiting between Mars and Jupiter. C) an icy body with a long tail extending from it. D) a chunk of space debris that has struck the ground. E) a streak of light in the atmosphere. Answer: E 9) The nucleus of a comet is typically 9) A) very durable, made of iron. B) a few hundred kilometers across, and bright, shiny white from its ices.
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Astronomy HW & EXAM 2 - Homework/Exam 2, PHYS 101Y...

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