Our Solar System - Crossword 2

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Across
  1. 2. Celestial objects made of large chunks of ice, dust and rock.
  2. 5. A planet made up of mainly rock
  3. 6. Pluto is now a dwarf planet because it does not ______ its orbit around the sun.
  4. 8. A meteoroid that completely burn up in the Earth's atmosphere.
  5. 10. The red planet.
  6. 13. The planet second closest to the sun
  7. 15. The unit often used to measure distances in our solar system are called ________ units (AU).
  8. 17. Huge collections of stars, gas, dust and planets found throughout the universe.
Down
  1. 1. A meteoroid that does not completely burn up in the Earth's atmosphere. Chunks can crash to the ground.
  2. 3. Celestial objects smaller than asteroids made of rock or metal
  3. 4. The time it takes Earth to fully orbit around the sun is called one _____.
  4. 7. Any object in space
  5. 9. The region between Mars and Jupitor is called the ______ belt.
  6. 11. The largest planet in our solar system
  7. 12. The inner planet with no atmosphere
  8. 14. Our galaxy is called the _____ way.
  9. 16. A ______ star is really just the burning up of a meteoroid as it travels through the Earth's atmosphere.