Andrew crowwword

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Across
  1. 6. frozen water
  2. 7. The rigid outer layer
  3. 10. 690 km above ground
  4. 11. energy in the form of waves or particles
  5. 12. state of balance in a system
  6. 13. land
  7. 15. water
Down
  1. 1. Spheres the spheres are closely connected
  2. 2. airplane level
  3. 3. gas
  4. 4. 85 km above ground
  5. 5. the earth's surface
  6. 8. 10000 km above ground
  7. 9. 50 km above ground
  8. 14. the ability to do work