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Chemical and Mechanical Erosion of Rocks STEM 50 Mercury Vapor $29 50 Mercury Vapor $29 low cost alternative to traditional Van de Graaff generators for producing high voltage static electricity in the classroom the sound and experience make students active participants in the effects of weathering and erosion This lab activity kit is designed to facilitate the investigation of chemical and mechanical erosion processes on three rock samples using hydrochloric acid and agitation within sealed bottles
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