STC Sound: Goals
In this unit, students investigate the phenomenon of sound. Their experiences introduce them to the following concepts, skills, and attitudes.
- Sounds are produced by vibrating objects and vibrating columns of air.
- Pitch and volume are two characteristics of sound.
- Changing the way an object vibrates can change the pitch and volume of the sound produced.
- Pitch is determined by the frequency of the vibrations; volume is determined by the amplitude of the vibrations.
- Changing the length, tension, or thickness of a string affects the frequency of vibration and, therefore, the pitch of the sound produced.
- The human ear has a membrane that vibrates when sound reaches it; the ear and the brain translate these vibrations into the sensation of sound.
- Sound is produced by the human vocal cords as air moves through the tightened cords.
- Performing experiments with sound.
- Describing the results of investigations with sound.
- Comparing and discussing the volume and pitch of the sounds produced.
- Communicating results through writing and with graphs.
- Reflecting on experiences with sound through writing and discussion.
- Using the results of previous experiments with sound to predict outcomes in new situations.
- Applying previously learned concepts and skills to design new sound-producing devices.
- Reading to obtain more information about sound, hearing, and the vocal cords.
- Developing an interest in investigating sound.
- Recognizing the importance of hearing safety.