Unit 3 THERMAL ENERGY

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Across
  1. 4. A direct change of state from gas to solid.
  2. 7. The only type transfer of heat that can happen in space.
  3. 12. The expanding of matter that happens when matter is heated. (TWO-WORDS)
  4. 14. The transfer of heat between objects or particles that are in direct contact, through particles collisions.
  5. 15. A change of state from liquid to gas, without boiling.
  6. 18. It is the measure of how fast in AVERAGE the molecules move (average speed.
  7. 20. The transfer of heat in fluids, where denser and cooler material sinks, while less dense and warmer material rises.
  8. 21. A state of matter in which particles are far away from each other, resulting in changing shape and volume.
  9. 22. A change of state from liquid to solid.
Down
  1. 1. If we _____ heat, a substance can change from gas to liquid.
  2. 2. A material, such as copper or the tile floor, that conducts heat well.
  3. 3. A state of matter in which particles are closely packed, resulting in a definite shape and volume.
  4. 5. The instrument that measures temperature.
  5. 6. A direct change of state from solid to gas.
  6. 8. A state of matter in which particles are still close, but they can move and slide pass each other, resulting in a definite volume, but changing shape.
  7. 9. The TOTAL kinetic and potential energy of all the particles in an object. It measures how fast ALL molecules move. (TWO-WORDS)
  8. 10. If we have a cup (200 ml) and a pot (2000 ml) of boiling water, which one has LESS thermal energy: the cup of water, or the pot of water?
  9. 11. A change of state from gas to liquid.
  10. 13. If we compare the water in a small indoor pool and in a big lake, which one has MORE thermal energy: the pool, or the lake?
  11. 16. A material, such as wood or glass, that does not conduct heat well.
  12. 17. A change of state from solid to liquid.
  13. 19. If we _____ heat, a substance can change from liquid to gas.