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Our little experiments

This summer too we have enjoyed our little experiments – when do wooden objects come together in the water and when do they have a “falling out”/ when do they come apart; how are magic circles created on the surface of the water sprinkled with pepper; we increased the salinity of water and observed how this makes objects float better.
We caused water to evaporate, observed how a jar „sucks“ the water out by vaccume and reveals submerged coins.