Which bubble is going to last the longest?

The time is ticking!

At Technicraft year 8 experienced an interesting group of lessons, involving making and testing 6 different substances to figure out which one (Glucose, glycerine, salt, sugar, water or detergent) would allow bubbles to last the longest without dehydrating and evaporating.

The glycerine had a lot of  viscosity (syrupy)  and was  transparent. Observations were like syrup  but white in colour.  When poured into a cup, the smell was a bit hideous.

5 cups and a plastic straw including a timer were part of the experiment to observe how long a bubble lives when it’s blown out of the straw. The detergent is combined with water and then poured  into the cup.

Following that as the salt, water and detergent were trialed and also timed. Unfortunately the bubble did not last very long (less than a second.) Salt does not create bubbles!

Later on, after testing all the substances and looking at the time they lasted. Unfortunately salt was the least bubble to stay the longest because salt can’t make a bubble. The glycerine should’ve lasted the longest, but  it was the sugar that proved to be most effective in sustaining the life of a bubble.  This result however, was very unusual.

To get long lasting bubbles, I recommend that your bubble mixture should include: glycerine, water and detergent.