In the coming weeks, students will learn to:
- Identify examples of vibration.
- Recognize that sound is the result of vibration; and demonstrate that the larger the vibration, the louder the sound.
- Recognize that there are ways of measuring the loudness of sounds and that loud sounds pose a danger to the ear.
- Recognize that pitch is the result of differences in the rate of vibration, and predict how a change in the rate of vibration will affect a sound.
- Demonstrate a variety of ways of producing sounds; e.g., by striking an empty glass, by blowing air into a bottle, by constructing and using a device that involves vibrating strings.
- Use sound-producing devices that the student has constructed to demonstrate methods for controlling the loudness, pitch and quality of sound produced.
- Identify examples that show that sound can travel through a variety of materials, including solids, liquids and air, and that sound travels in all directions.
- Describe how the human ear senses vibrations.
- Compare the range of hearing in humans to that in other animals; e.g., dogs and bats.
- Recognize that certain sounds have characteristics that cause them to be interpreted as pleasant or unpleasant, and identify these characteristics.
- Describe changes in hearing that result from continued exposure to loud noise and from the natural process of aging.
- Construct and evaluate different kinds of soundproofing and sound-amplifying devices.
- Explain the role that sound plays in communication.