States of Matter

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Across
  1. 4. Oil will ______ on water because it is less dense than water.
  2. 8. At the ______ point, solid turns to liquid.
  3. 12. A liquid can become gas through a process call ______.
  4. 13. Water vapour in the air can ______ into liquid when it is cold.
  5. 15. To change from liquid to gas, the substance will ______ heat.
Down
  1. 1. There are ______ states of matter - solid, liquid and gas.
  2. 2. At the ______ point, liquid turns to gas.
  3. 3. To change from solid to liquid, the substance must ______ heat.
  4. 4. The process where liquids turn to solids is called ______.
  5. 5. A piece of plasticine will sink in water because it has a ______ than water.
  6. 6. Evaporation only occurs at the ______ of a liquid.
  7. 7. A piece of cork will float in water because it has a ______ density than water.
  8. 9. To change from liquid to solid, the substance will heat.
  9. 10. ______ is the mass of matter in a unit volume of substance.
  10. 11. To change from gas to liquid, the substance will ______ heat.
  11. 14. Mercury is denser than water, so it will ______ in water.