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