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* Left: Fill 3 ml sea salt and 3 ml Dead Sea salt (available in pharmacies) into the cylinders of two 5-ml syringes.
* Photo 2 und 3: Mix 3 ml of each salt with 3 ml water:Wasser. Observation : 3 ml + 3 ml result in 5 ml mixture.
  Gas bubbles rise between the salt crystals.
* Photo 4: Most of the Dead Sea salt dissolves, half of the sea salt  does not dissolve.
* Right: The scale was balanced with equal amounts of sea salt (or Dead Sea salt) on the left scale and salt from the kitchen  on the right one.
The  salts from the sea and from the Dead Sea absorb water vapour from the air.