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