SOLAR ENERGY

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Across
  1. 2. a natural light source?
  2. 5. the sun shines?
  3. 7. solar power is?
  4. 11. solar energy is?
  5. 12. the title of the crossword?
  6. 13. for low power uses?
  7. 15. solar ______?
Down
  1. 1. solar energy causes no?
  2. 3. solar energy does not work at?
  3. 4. power _______ cells?
  4. 6. solar power is used to make?
  5. 8. to build power stations are?
  6. 9. a heat energy?
  7. 10. a unit of power equal to one million watts?
  8. 14. solar power is ____?