k. Waves

A horseshoe bat is able to use echolocation to fly in total darkness. With this ability, it can locate and determine the relative speed of a moth. This ability allows bats to track down their prey.

Essential Question: How does a bat use echolocation, and how are moths able to reduce a bat’s ability locate its position?

Bat using echolocation to find prey.

Cymatics video description & explanation

Making waves website:

http://phet.colorado.edu/en/simulation/wave-on-a-string

Doppler effect applet:

http://www.grc.nasa.gov/WWW/K-12/airplane/sndwave.html

Resonance of an Open Air Column

The Science and Mathematics of Sound, Frequency, and Pitch

Ultrasonic Ringtones

Acoustic Levitation

Standing Wave Demonstration

What does sound look like?