Heat

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Across
  1. 3. particles that run into each other
  2. 4. another name for heat waves
  3. 5. ________energy is the total kinetic energy of a substance
  4. 9. transfer of energy through electromagnetic waves
  5. 11. substances that conduct thermal energy well
  6. 15. used to measure temperature
  7. 16. when a fluide circulates due to density differences it make a convection_______
  8. 18. tranfer of thermal energy through fluids
  9. 19. the atmosphere acts like windows in a _______
Down
  1. 1. waves that can travel through outer space
  2. 2. energy transferred between objects
  3. 6. most of these are good conductors
  4. 7. substances that don't conduct thermal energy well
  5. 8. unit used to express thermal energy
  6. 10. the absence of heat
  7. 12. measures the average kinetic energy of the particles in a substance
  8. 13. transfer of thermal energy by direct contact
  9. 14. no particles to move in a ________
  10. 17. when water is heated it becomes less dense