Curated OER
Waves
An incredibly colorful PowerPoint presents all the facts and definitions about waves that you could need for beginning physical scientists. There are several useful links to online animations of wave action. This may have been produced...
Curated OER
What are Earthquakes?
Here is a scientific presentation of earthquakes. The elastic rebound theory is explained, as well as the different types of waves and how they are measured. Just a note: Slide number 15 has a diagram that is upside down. Enable editing...