2010 Midterm 1

2010 Midterm 1 - 1. A planet has an orbital period of 8...

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1. A planet has an orbital period of 8 years. Its distance from the Sun is closest to: A. 1/8 AU B. 1/4 AU C. 1/2 AU D. 2 AU E. 4 AU 2. Gaps in the asteroid belt are caused by: A. the explosion of a protoplanet B. orbital resonances with Jupiter C. dark matter D. Halley's comet E. frequent collisions among asteroids 3. The mass of a planet can be determined from: A. its albedo B. the orbital period and distance of one of its moons C. its orbital period and distance from the Sun D. its diameter E. its rotation rate 4. The planet with the least density is A. Earth B. Pluto C. Mars D. Mercury E. Saturn 5. Geostationary satellites have an orbital period of: A. 1 hour B. 90 minutes C. 1 day D. 29 days E. 1 year 6. The Sun makes up what fraction of the solar system mass? A. 70% B. 80% C. 90% D. 95% E. 99.9%
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7. The surface of Venus was first mapped by A. Earth-based radio astronomy B. the Hubble Space Telescope C. the Palomar Observatory D. orbiting spacecraft E. Galileo 8. Halley's comet is visible from Earth about every A. 5 years B. 11 years C. 29 days D. 76 years E. 400 years 9. We know the Sun's surface temperature is about 5800 degrees Kelvin from A. from the orbital period and distance of its orbiting planets B. observations during solar eclipses C. space probes D. comparisons to other stars E. the shape of its electromagnetic radiation spectrum
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2010 Midterm 1 - 1. A planet has an orbital period of 8...

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