Across
- 4. How high or low pitched a sound is
- 5. substances that make surfaces slippery when they rub together
- 6. Three tiny bones that pass vibrations to the inner ear.
Down
- 1. shape that is round like a ball
- 2. Non-contact force that can attract or repel magnetic objects
- 3. Shell-shaped part that turns vibrations into signals for the brain.