Across
- 2. what does sound travel in
- 5. what can sound waves not travel through?
- 6. our______ pick up sound waves
- 8. what type of wave is sound
- 10. the place on a wave where molecules are close together
Down
- 1. what does sound need to travel
- 3. the spot on a wave where the molecules are far apart
- 4. how many waves pass in one second
- 7. how high or low a sound is
- 9. what is frequency measured in