Our Solar System Study Guide

Question or Hint Answer or Word
  1. The center of our solar system Sun
  2. Planet closest to the sun Mercury
  3. Planet farthest from the sun Neptune
  4. a natural satellite that orbits a planet moon
  5. Time it takes Earth to rotate once 24 hours / 1 day
  6. Time it takes Earth to orbit the Sun 365 days
  7. Pluto, Eris, Ceres dwarf planets
  8. Large, irregularly shaped rocky or metallic objects that orbit the Sun asteroids
  9. bodies of ice, frozen gases, rock, and dust that travel in elliptical orbits from far beyond the outermost planet to the Sun comets
  10. Where most asteroids in the solar sysstem are found Asteroid Belt
  11. Home for the shortest and longest days of the year Summer & Winter Soltice
  12. Days with 12 hours of daylight autumnal and vernal equinoxes
  13. Number of days between each New Moon about 30 days
  14. Phase of the Moon that is NOT visible from Earth New Moon
  15. Mercury, Venus, Earth, Mars inner planets
  16. Jupiter, Saturn, Uranus, Neptune outer planets
  17. Planets known as terrestrial planets rocky surfaces
  18. Planets farther away from the Sun gas giants
  19. The imaginary line through the center of a planet around which the planet rotates axis
  20. What causes planets to orbit the Sun? Sun's gravity

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