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182-Obsidian Grades 3-8 $7.00
Mystery includes rock, fossil, or mineral sample and Mystery questions with teaching instructions.

SAMPLE:
—A piece of Obsidian with sharp edges

TEACHING OBJECTIVES:
— To introduce the volcanic glass, Obsidian
— To portray the idea that glassy lava can be caused by the rapid cooling of stiff, viscous (thick and sticky) volcanic flows.
— To introduce the concept of tool usage by early civilizations

GRADES 3-8		 182.JPG
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Ruth Deike
Rock Detective Geoscience Education
395 Deer Run Drive
Nellysford , VA 96080
Phone: 434-263-3737

EMAIL:

 
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