It explains earthquakes and their causes. It discusses the use of a Richter scale to measure earthquake and the measures taken to protect against earthquakes.

Upon viewing the The Nature of Waves video series, students will be able to do the following: Define waves as traveling disturbances that carry energy through matter or space. Explain that waves do not actually move matter. Instead,...

An introduction to mechanical waves which are defined and demonstrated. The fact that the medium is not displaced is demonstrated. Both transverse waves and longitudinal waves are also defined and demonstrated.

This video explores the characteristics of waves. It explains the speed of waves, how this value is calculated and the four basic interaction between waves. Other terminology includes: vibration, crest, trough, amplitude, wavelength,...

The Effects of Disturbances on Ecosystems: This Clip gives examples of how disturbances - both large and small - affect ecosystems and their reestablishment.