Light Sound Matter

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Across
  1. 5. A back and forth movement that creates sound.
  2. 6. Has no definite shape or volume.
  3. 7. Gas turning into liquid.
  4. 8. Something that makes its own light (e.g., Sun, light bulb).
  5. 11. Light bending when it moves from one material to another (e.g., air → water).
  6. 13. Tiny units that make up all matter.
Down
  1. 1. Solid changing into liquid.
  2. 2. Has a definite shape and volume.
  3. 3. Liquid turning into gas.
  4. 4. Wave, The way sound energy travels through air, water, or solids.
  5. 9. Number of vibrations per second (affects pitch).
  6. 10. Has definite volume but takes the shape of its container.
  7. 12. Anything that has mass and takes up space.