Water quality experiments

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The experiments from this media package thematically belong to subexperiment “B4.1 We produce drinking water – Methods of purifying water” from Experimento | 10+. They have been written especially for the lower grades at secondary schools. They overlap with experiment “B2 Water purification” from Experimento | 8+.
The four subexperiments “Do all substances dissolve in water?” “We clean water,” “Detect invisible substances in water (1),” and “Detect invisible substances in water (2)” each include illustrated instructions on preparing and conducting the experiment. Different assignments on the experiment are presented; variation is possible at any time.
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