Cool Labs

Wind Instruments Inquiry
Wind Instruments Inquiry

Students will use three simple toy instruments to explore fundamentals of sound and frequency in this inquiry exercise. Boomwhackers: Students will share a number of colored plastic tubes of various lengths. Standing sound waves are excited inside the tubes, with...

Doppler Effect
Doppler Effect

The Doppler Effect occurs when an observer hears a sound from a moving source. If the sound source is moving toward the observer, the perceived frequency will be higher than the actual sound frequency. If the source is moving away...

Resonance: Speed of Sound
Resonance: Speed of Sound

Resonance occurs when an object is made to vibrate at its natural frequency, and the vibrations reinforce themselves, becoming larger. In the case of sound, the object can be a column (or other vessel) of air, and the larger vibrations...

Speed of Sound in Air
Speed of Sound in Air

In this lab students will measure the amount of time for a series of echoes, and calculate the time for one echo. They will then experimentally determine the speed of sound in air. An extension activity asks students to compare...

Lab #26.9 Sound: Sound Off
Lab #26.9 Sound: Sound Off

PurposeIn this activity, students will hear a dramatic effect of the interference of sound. DiscussionInterference is a behavior common to all waves. With water waves we see it in regions of calm where overlapping crests and troughs coincide. We see...

Lab #26.1 Sound: Slow Motion Wobbler
Lab #26.1 Sound: Slow Motion Wobbler

PurposeIn this activity, students will observe and explore the oscillation of a tuning fork. DiscussionThe tines of a tuning fork oscillate at a very precise frequency. That's why musicians use them to tune instruments. In this activity, you will investigate...