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Whatis.com: Specific Gravity

For Students 9th - 10th
This article tells what specific gravity and how to compute the specific gravity for solids, liquids, and gases.
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OpenStax

Open Stax: Physics: Archimedes' Principle

For Students 11th - 12th
From a chapter on Fluid Statics in a Physics textbook. This section of the chapter provides a detailed discussion of Archimedes' principle, buoyant force, floating and sinking, and the role of density. Includes questions, problems and...
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Rockhounding Arkansas: Basic Mineral Identification

For Students 3rd - 8th
Want to learn about rock collecting? This page introduces you to the basics and language of rocks and -inerals. Learn what the difference is between a rock and a mineral.

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