Thermal Energy

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Across
  1. 2. a material that slows the transfer of thermal energy
  2. 10. the motion of atoms or molecules within a substance
  3. 11. material that reduces heat flow
  4. 12. the temperature at which ice becomes liquid
  5. 14. a container designed to reduce heat transfer
  6. 15. the removal of thermal energy from a substance
  7. 16. water in gas form
  8. 19. the transfer of thermal energy from warmer to cooler areas
  9. 21. the temperature at which water becomes ice
  10. 22. what molecules do faster when thermal energy is added
  11. 23. matter with atoms far apart and moving quickly
  12. 25. rubbing that produces thermal energy
  13. 26. a measure of the average kinetic energy of molecules
Down
  1. 1. tiny particles that speed up when heated
  2. 3. what water vapor does when it loses energy
  3. 4. when gas loses energy and becomes liquid
  4. 5. when water gains energy and becomes liquid
  5. 6. when water loses energy and becomes solid
  6. 7. matter with tightly packed atoms that only vibrate
  7. 8. a process that creates new substances and releases or absorbs energy
  8. 9. a device where a chemical reaction releases thermal energy
  9. 13. an electrical appliance that adds thermal energy to air
  10. 17. a heat source that increases the temperature of food
  11. 18. the biggest natural source of heat on Earth
  12. 20. matter with atoms that move around and bump into each other
  13. 24. what must be added or removed for heating or cooling to happen