Space Unit review

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Across
  1. 3. The red planet
  2. 5. The Canadian space agency
  3. 7. A planet with a thick atmosphere that melted a Soviet lander
  4. 9. The distance from a star that is just right for life
  5. 12. no longer a true planet
  6. 13. A planet not in our solar system
  7. 14. our star
  8. 16. A possible place we could find life
  9. 17. Grow and lost in the ISS
  10. 18. The biggest planet in our solar system
Down
  1. 1. The theory for the origin of the universe
  2. 2. A type of planet that is mostly composed of rocks
  3. 4. An object that orbits another object in space
  4. 6. How old is the universe
  5. 8. One of the hazards to living in space
  6. 10. The first Canadian satellite
  7. 11. Canada's biggest contribution to the international space station
  8. 15. A cloud of gas and dust in space