Elements 1 to 20 with Examples of their Everyday Use

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Across
  1. 4. protein
  2. 5. found in fruits and vegetables
  3. 10. swimming pools
  4. 12. sun and stars
  5. 13. toothpaste
  6. 14. make advertising signs light up brightly
  7. 15. eggs
Down
  1. 1. shells and bones
  2. 2. light bulbs
  3. 3. air
  4. 6. airplanes
  5. 7. salt
  6. 8. makes bones strong
  7. 9. batteries
  8. 11. sports equipment
  9. 12. put in balloons to make them float