Big Brain Solar

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Across
  1. 2. mill
  2. 4. in space
  3. 6. energy
  4. 8. power
  5. 10. solar
  6. 11. a big machine with wheels to power things
  7. 14. energy efficient
Down
  1. 1. superhero
  2. 2. on earth
  3. 3. thermometer
  4. 5. it carries heat
  5. 7. wave
  6. 9. faster than the speed of
  7. 12. the sun
  8. 13. a shock