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New Dana System Mineralogy Database

For Students 9th - 10th
Over 3,900 mineral species descriptions are included in this HTML-linked table of Dana classifications for all known valid mineral species. 3-D models are available for over 600 minerals.
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Curated OER

Ntnu Virtual Physics Lab: Thick Lens Java Applet

For Students 9th - 10th
An interactive Java applet which allows the user to investigate the path of light through a lens shape object. The shape of the object, the index of refraction of the material, and the location of the incident rays can be altered.
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Georgia State University

Georgia State University: Hyper Physics: Sound Propagation

For Students 9th - 10th
This page and the many pages which are indexed to focus on the behaviors of sound which characterize it as a wave. Reflection, refraction, interference, diffraction and more are clearly illustrated and explained.

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