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Roches et min raux; La duret

10/10/2012. 2. Introduction. D?terminer les ?tapes favorables ? la r?alisation d'activit?s scientifiques simples, faciles ? mettre en place et enrichissantes.Probl?matique porte sur les caract?ristiques des roches et min?raux. Plus sp?cifiquement, sur la duret?.Vise ? faire ?voluer certaines conc

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Roches et min raux; La duret

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