In this video David shows how to determine the equation of a wave, how that equation works, and what the equation represents. [14:43]

After an earthquake, Andrija Mohorovicic was the first one to realize that there are distinct layers to the earth. This video explains the seismic activity that can occur after earthquakes that led to this discovery. [6:12]

A video solving problems and explaining concepts about the doppler effect. In this video, problems are solved when both the listener and the source are moving together? [7:34]

Explore how water flows through a river. Watch kids use the scientific method to find out why there are rapids in one area of a river and calm areas in another. [7:12]

Mr. Andersen introduces the concept of waves. Both transverse and logitudinal waves are described. The relationship between wave speed, wave frequency and wavelength is also included.

Animation demonstrates how seismic waves migrate away from an earthquake. [0:08]