Vocab

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Across
  1. 3. a disc of small countless particles orbiting a planet
  2. 7. a massive impact crater on Mercury
  3. 9. the largest moon of Saturn
  4. 11. the largest volcano in the entire solar system
  5. 13. a system of canyons on Mars
  6. 14. one of Mars moons that refers to the Greek God of fear/panic
  7. 16. Jupiter's four largest moons
  8. 17. a system that uses radio waves to find objects.
  9. 18. the four large outer planets of the solar system
Down
  1. 1. a molecule breaking apart into smaller pieces
  2. 2. the largest and most unusual moon of Neptune
  3. 4. a large continent-sized highland region on Venus
  4. 5. a narrow fast-flowing "river" of air in a planet's atmosphere
  5. 6. a steep slope or cliff
  6. 8. the smaller of Mars moons, named after the Greek God of dread/terror
  7. 10. small rocky planets that are too small to have a large thick atmosphere
  8. 12. the largest moon in the solar system and satellite of Jupiter
  9. 15. the distance from a planet where a smaller orbiting object gets super close the that planet's gravity over comes it