Concepts of Sound
Teachers need to keep these ideas in mind thought the unit to help guide instruction and to emphasize with learners.
- Sounds have identifiable properties.
- Objects can be identified by the sound they make when dropped.
- The identifiable properties of sounds can convey information.
- Sustained sound is caused by vibrations.
- Sound requires a source and a receiver.
- The intensity of the vibration determines the volume.
- Sound originates from vibrating sources.
- Pitch is how high or low a sound is.
- Differences in pitch are caused by differences in the rate at which objects vibrate.
- Pitch can be changed by changing the length or tension of the object vibrating at the sound source.
- Sound vibrations need a medium to travel.
- Sound can travel through solids, liquids and gas.
- Sound energy can be directed with reflective tubes and megaphones.
- Human ears are designed to gather sound energy.
- Several variables affect pitch, including size and tension of the vibrating object at the sound source.
- Sound can be directed through air, water, or solids to the sound source.
- The medium that sound passes through affects its volume and the distance over which it can be heard.
Inquiry Skills
Inquiry skills are those skills students use to make sense of their science investigations. They tell what the students will actually be doing in science. The Inquiry Skills for Physics of Sound are:
Observe
Record
Collaborate
Measure
Explain
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Quantify
Communicate
Predict
Infer
Ask Questions
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