Earth's Atmosphere

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Across
  1. 6. outer space
  2. 8. weather balloons
  3. 9. mark the altitude where aircraft can't fly
  4. 11. Soda
  5. 13. Air
  6. 14. Balloon
Down
  1. 1. cold air
  2. 2. Gas
  3. 3. weather
  4. 4. Light
  5. 5. Thin air
  6. 6. Critical altitude
  7. 7. Atmosphere
  8. 10. Stars
  9. 12. Layer shield