Solar System Vocabulary Review

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Across
  1. 4. the path of an object as it revolves around another object in space
  2. 7. one of the different apparent shapes of the moon as seen from Earth
  3. 8. the periodic rise and fall of the level of water in the ocean
  4. 10. the partial or total blocking of one object in space by another
  5. 11. the central region of the sun, where nuclear fusion takes place
  6. 12. one of the rocky objects revolving around the sun that are too small and numerous to be considered planets
  7. 13. a push or pull exerted on an object
  8. 14. an object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit
  9. 15. the name often given to the four inner planets: Mercury, Venus, Earth, and Mars
  10. 16. the process by which energy is produced in stars
  11. 18. the attractive force between objects; the force that moves objects downhill
Down
  1. 1. the name often given to the outer planets: Jupiter, Saturn, Uranus, and Neptune
  2. 2. the region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found
  3. 3. the system consisting of the sun and the planets and other objects that revolve around it
  4. 5. an object that orbits a planet
  5. 6. the movement of an object around another object
  6. 9. an object that orbits the sun and is spherical, but has not cleared the area of its orbit
  7. 17. a ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion