Planet Gallery Walk Review

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Across
  1. 3. the most volcanically active object in the SS
  2. 5. Cliffs on Mercury are called this
  3. 8. Planet with the largest ring system
  4. 10. icy rock that lets off gas and dust as it flies
  5. 12. The color of Mercury to the naked eye
  6. 13. largest moon in the SS
  7. 14. Saturn's largest moon
  8. 17. oldest and most heavily cratered surface in the SS
  9. 18. this gas makes Neptune blue
  10. 19. This element makes Mars red
  11. 20. the only planet to rotate on its side
  12. 21. this planet has no moons
Down
  1. 1. Venus toxic atmosphere is made of this gas
  2. 2. Region of icy bodies, asteroids, and comets
  3. 4. Jupiter is a ____ giant.
  4. 6. Pluto's moon
  5. 7. this IN university sent 24 graduates to astronaut program
  6. 9. Pluto is classified as a ________ planet.
  7. 10. Jupiter's Great Red Spot
  8. 11. smallest planet
  9. 15. last name of the first man on the moon
  10. 16. farthest planet from the sun