States of Matter

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Across
  1. 5. When a gas cools down and turns back into a liquid, like dew on grass.
  2. 7. This state of matter has a definite volume but takes the shape of its container.
  3. 8. The tiny building block that makes up all matter.
  4. 10. The process where a solid gains energy and turns into a liquid.
  5. 11. The process where a liquid loses energy and turns into a solid.
Down
  1. 1. When a liquid turns into a gas at the surface, like a puddle drying up.
  2. 2. A rare change where a solid turns directly into a gas (like dry ice).
  3. 3. In this state, particles are packed tightly together and only vibrate in place.
  4. 4. The amount of space an object or substance takes up.
  5. 6. The "fourth state" of matter found in stars and lightning.
  6. 9. You must add or remove this to make matter change its state.
  7. 10. Anything that has mass and takes up space.
  8. 12. This state of matter has no definite shape or volume and fills all available space.