heat

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Across
  1. 2. All hot things emit (give out) ____ radiation
  2. 4. Radiation does not need particles to transfer ______
  3. 5. ______ things are good reflectors of IR radiation
  4. 7. What do you measure temperature with?
  5. 10. When a fluid is heated the molecules gain _______ and move around more
  6. 13. How heat travels through a vacuum
  7. 14. When the solids are _______ the particles gain more energy and vibrate more; passing on this energy to their neighbouring molecules
  8. 18. What is the measurement for temperature?
  9. 24. Happens in fluids
  10. 26. A conductor can pass on their energy faster than the _______
  11. 27. The average movement of energy particles in a substance
  12. 28. Will sink to be heated in a convection current is ______ dense
  13. 29. to reduce heat loss by convection you need to ______ the amount of fluids so the current can't form eg trap air , vacuum
Down
  1. 1. When molecules are heated they _______ more quickly
  2. 3. Does the opposite of a conductor
  3. 6. energy Heat is the _________ the particles have
  4. 8. An example of a conductor
  5. 9. What happens to the substance when the molecules gain energy and move around more ?
  6. 11. Happens in solids
  7. 12. to reduce heat loss by radiation you want silver surfaces to ______ the heat back
  8. 15. An example of an insulator
  9. 16. When a substance is heated the molecules start to move around more ______
  10. 17. ______ things are goo absorbers and emitters of IR radiation
  11. 19. If two _______ are touching and are at different temperatures heat will be conducted from the hotter solid to the colder solid.
  12. 20. More dense substance is _____
  13. 21. To reduce heat loss by convection currents you need to use ______
  14. 22. Heat is measured in what?
  15. 23. When the fluid expands it becomes _____ dense and rises
  16. 25. equilibrium Heat travels from hot to cld until everything is the same temperature;This is called _______