1) Tools required to perform the experiment:
-a large transparent glass
-a small glass
2) Protective equipment required:
-blouse
-Protective glasses
3) the material: products / solutions…. required:
-syrup
-oil
-water + dye
-dishwashing liquid
4) necessary time:
5 min
5) Objective / goal sought:
the goal is to manage to superimpose solutions without mixing them
6) Possible risks / dangers:
-washing up liquid in the eyes
7) the assumption:
is it possible to superimpose several different liquids without them mixing?
8) Manipulations (protocol)
-in a small glass, mix 2 drops of dye with a little water
-well stirred
-in a large transparent glass, pour syrup
-tip the glass and let the dishwashing liquid run down the glass
-do the same with the colored water but very gently, otherwise the water will mix with the dishwashing liquid
-add the last layer, the oil
here, we can see that the liquids are superimposed one on the other
10) Analysis (discussion):
some liquids are heavier, more "dense". here the syrup is the densest that's why we put it at the bottom of the glass otherwise if we laurai put above the syrup would have run at the bottom of the glass. on the other hand the oil is not very dense in all cases it will always go back to the top which explains this arrangement of liquids
11) The conclusion:
we can therefore conclude that yes it is possible to assume different liques while respecting their roles of placement in the glass with their densiter
