PBS
Pbs Teachers: Scientific American: Calls of the Wild: Bats and Echolocation
Explore bats' navigation systems by experimenting with echolocation. Approximate an object's distance by analyzing reflected sound waves, measuring the delay in sound and calculating the ratio to the speed of sound.
Other
Ask Numbers: Measurement Conversion Calculators and Charts
What kind of unit conversion would you like to do? This site will allow you to do a multitude of conversions. Just click on the specific measurement you are needing to convert. It also provides a history of measurements and a chart of...
Alabama Learning Exchange
Alex: Sonar Mapping of the Ocean Floor
Mapping the ocean floor must be done by indirect observation. One method involves bouncing a sonar signal off of the ocean floor and measuring the length of time this signal takes to return. This length can be translated into distance:...