Space Rocks

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Across
  1. 4. This has been found on Mars frozen and as vapor, but not yet as a liquid.
  2. 6. This is a "dirty snowball" orbiting the sun with a "tail" made of vapor and dust.
  3. 9. The asteroid ____ is a ring of asteroids that orbit the sun between Mars and Jupiter.
  4. 10. a meteoroid, when it hits our atmosphere and burns up, leaving streaks of light in the sky
  5. 11. Mars has a thin ______, without any oxygen.
  6. 12. How many moons does Mars have?
Down
  1. 1. Mars has ___ gravity than Earth. (more or less?)
  2. 2. Olympus Mons on Mars is the largest one of these in our solar system
  3. 3. Is Mars a terrestrial or gaseous planet?
  4. 5. a space rock that is larger than a meteoroid
  5. 7. a meteor that doesn't burn up all the way and hits the earth
  6. 8. dirt and rocks floating around in space