Fire (part 1) Vocabulary

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Across
  1. 1. liquid to solid
  2. 3. transfers from high temperature to low temperature substances
  3. 5. breaking a solid into smaller pieces increases its ______________.
  4. 6. speeds up a reaction by lowering the activation energy
  5. 10. solid to liquid
  6. 15. energy needed for to start a reaction
  7. 16. liquid to gas
  8. 17. absorbs energy
  9. 19. During phase changes, the temperature is __________.
  10. 20. speed
Down
  1. 2. releases energy
  2. 4. difference between the PE of the products and the PE of reactants
  3. 7. solid to gas
  4. 8. gas to liquid
  5. 9. ___________ curve: shows the changes in temperature of a susbstance while taking heat away
  6. 11. measure of the average kinetic energy of a sample
  7. 12. ___________ curve: shows the changes in temperature of a substance while adding heat
  8. 13. energy of movement, measured by temperature
  9. 14. gas to solid
  10. 18. stored energy, changes during phase changes