....

At the Red Sea it is very easy to get 5 ml of sea water. At home you have to buy a special salt ("artemia salt") which is available in shops that sell fishes for an aquarium. Dead Sea salt you will get from a pharmacy.
What you need
A tray (cut from a Tetra Pak), injection bottle 5 ml whith stopper and aluminium closure from experiment 2, two-pan scale, spatula (= cut from a big drinking straw), 5-ml syringe, artemia salt, dead sea salt, water.
Investigation
* Left: The girls cooperate to balance a two-pan scale.
* Photo 2: A metal closure of a Liquemin vial is much lighter than a German Pfennig coin, but it is
  the right weight for your experiment: 200 milligrams (mg).
* Photo 3: Put 1 metal closure on the right pan of the scale.
* Balance the scale by adding special salt (200 mg) to its left pan.
* Photo 4: Use a funnel to transfer the salt from the pan into a clean Liquemin vial.
* Inject exactly 5 ml of fresh water by a syringe.
*  Right: After shaking you have made Red Sea water.
Repeat the same experiment with 200 mg of Dead Sea salt.
Result
Sea water is obtained by dissolving 200 mg artemia salt in 5 ml of water.