Across
- 3. Sound is reflected from hard substances like the tiles in your bathroom
- 5. Has the movement of the particles in the medium in the same dimension as the direction of movement of the wave
- 7. Light energy can travel through the substances
- 8. The number of times a wave cycles in one second
- 9. Emits light because it’s hot
Down
- 1. Blocks all the light passing through
- 2. Transferred to particles inside the substance
- 4. The length of one wave cycle
- 5. Any object or substance that give off their own light
- 6. The medium moves at right angles to the direction of the wave