States and Changes in Matter

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Across
  1. 2. Attraction between molecules; strong in solids and weak in gases.
  2. 5. A change from one state (solid or liquid or gas) to another - a physical change - there is no change in the chemical composition.
  3. 6. A change of state from a gas to a liquid due to a cooling; requires the removal of heat.
  4. 8. Change of state from a solid to a liquid with the addition of thermal (heat) energy.
  5. 9. The degree of compactness of a substance.
  6. 12. A quality or condition of a substance that can be observed or measured; can be changed without forming a new substance.
  7. 14. A form of matter that has a definite shape and volume; isn't compressible, little or no space between particles; particles vibrate in place.
Down
  1. 1. The physical forms of matter, which include solid, liquid, gas, and plasma. Also, called "phases".
  2. 3. The change of state from a liquid to a gas due to evaporation or boiling; requires addition of heat.
  3. 4. The change of state from a liquid to a solid; occurs when a liquid loses thermal (heat) energy.
  4. 5. A state of matter that starts as a gas and then becomes charged; give off light like lightning or auroras.
  5. 7. A change directly from the solid to the gaseous state without becoming liquid; requires the addition of heat.
  6. 10. A change of state from a gas to solid; requires removal of heat.
  7. 11. A state of matter with no definite shape or volume; is easily compressed because of space between particles.
  8. 13. A state of matter that has no definite shape but has a definite volume; not easily compressed because there is less space between particles; particles flow.