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Make photograms yourself with your students
This instructional video gives an overview of the method in the darkroom when making photograms.
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Permeability loose rocks: Experiment
This experiment demonstrates the permeability of loose rocks (sand, silt and clay) to. In the first part of the film, the problem addressed and you see the difference after a rainstorm for a sandy, loamy and clay soils. In the second part, this …
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Video (16)Schoolboard, ICT co-ordinator