science

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Across
  1. 5. main way that heat travels through liquids and gases
  2. 7. area x pressure
  3. 10. metric unit of weight
  4. 13. measures voltage
  5. 15. no charge
  6. 16. measure in hotness and coldness
  7. 19. mass x gravity
  8. 20. number of protons
Down
  1. 1. mass/volume
  2. 2. circles in an atomic model
  3. 3. transfer of energy by contact
  4. 4. —|—-|-
  5. 6. concentration of a force
  6. 8. column of chemical elements
  7. 9. transfer of heat by electromagnetic waves
  8. 11. substances in the periodic table
  9. 12. positive electric charge
  10. 14. negative electric charge
  11. 17. row of chemical elements
  12. 18. force/pressure