| Sound: Loud, Soft, Hight, and Low, Paperback - Natalie M. Rosinsky • elefant.ro | 53.99 RON |
| Sound: Loud, Soft, High, and Low - Natalie Myra Rosinsky • libris.ro | 55.75 RON |
Sound is created through vibrations that vary in pitch and volume. This creates sound-waves that you can hear. Includes experiments.