If the delay between a sound and its echo is less than 1/10th of a second, the human ear can’t distinguish it. Through the use of a Slinky, rubber band guitar, and straws, scholars explore where sound comes from and how it travels. Whole class, small group, and individual activities vary the method of instruction and keep class engagement high.

Concepts

sound, sound energy, sound vibrations, sound waves, wavelength, frequency

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Additional Tags

science

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Instructional Ideas

• Invite the band or orchestra teacher to discuss tuning a large ensemble
• Extend the concept by researching sound proofing material

Classroom Considerations

• Requires no prior knowledge

Pros

• Offers basic version of the lab and and an advanced version that goes into tuning instruments, echos, and tones
• Challenges pupils with higher order thinking skills

Cons

• Lesson uses a shive wave machine, which is not readily available

Common Core

RST.9-10.3 RST.9-10.4 RST.11-12.3 RST.11-12.4