Brainwaves: Science Puzzle

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Across
  1. 3. Green part of a plant
  2. 5. Sound comes from a source of
  3. 11. We hear with these
  4. 12. We live on planet
  5. 13. Opposite of loud
  6. 14. Can attract some metals
  7. 17. A force that moves something away
  8. 19. Clothes are made from this
  9. 21. Opposite of north pole
  10. 22. Time when it is dark outside
  11. 25. Energy that makes a lamp work
  12. 27. Time when the Sun is visible
Down
  1. 1. A force that brings something closer
  2. 2. Earth has land and ...
  3. 4. Opposite of stop
  4. 6. One pole of a magnet
  5. 7. Something we can hear
  6. 8. Spoons can be made from this
  7. 9. A musical instrument you hit
  8. 10. Books are made from this
  9. 15. Windows are made from this
  10. 16. A device that uses electricity
  11. 18. Part of a plant that grows underground
  12. 20. Gives power to many toys
  13. 23. Tables are often made of this
  14. 24. Part that holds the plant upright
  15. 26. A hard natural material