States of Matter!

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Across
  1. 2. — Something that can cause particles to move faster or change the state of matter.
  2. 5. — Anything that has both mass and occupies space.
  3. 7. — The process in which a liquid changes into a gas.
  4. 10. — An atom or molecule that has gained or lost electrons and therefore has an electric charge.
  5. 11. — A state of matter that has a definite volume but changes shape to match its container.
  6. 13. — The process in which a gas loses energy and changes into a liquid.
  7. 14. — A measure related to the average kinetic energy of particles in a substance.
Down
  1. 1. — The process in which a liquid loses enough thermal energy to become a solid.
  2. 3. — A state of matter formed when enough energy causes atoms to lose or gain electrons.
  3. 4. — A change in which particles at the surface of a liquid gain enough energy to become a gas.
  4. 6. — A state of matter whose particles are widely separated and move freely in all directions.
  5. 8. — A tiny unit of matter that makes up substances.
  6. 9. — A state of matter whose particles are tightly packed and mainly vibrate around fixed positions.
  7. 12. — Describes the type of energy associated with the motion of particles.
  8. 15. — The change that occurs when a substance gains enough energy to go from solid to liquid.