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...GRADE 1: Red Sea water, Dead Sea water and Salina
..                    What can you do with the babies of Salina?
......GRADE 3: You learn to weigh like in pharaonic times

...GRADE 4: Measure the volume of water and of aluminium closures of Liquemin bottles
......GRADE 4: Measure the mass of these closures and calculate the mass of 1 ml aluminium
.......GRADE 5: Molecule modelling with plastic beeds of defined colours

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