Our last Summer Science Hangout was all about bubbles, not just normal bubbles, but GIANT bubbles.
I tried the bubbles first using ordinary bubbles mixture, which didn’t work at all, so I turned to Red Ted Art for some help. We made the bubble mixture following the recipe here, and it worked amazingly well.
We made our own bubble wands using some string and straws, this photo shows our mini version.
The big version made these giant bubbles!
We even used a tube to make a bubble pipe. I didn’t think this would work, but it was fantastic. We used the inside of a roll of wrapping paper so it was quite a long tube and made a satisfying noise as the bubble popped out.
Questions to ask
Can you see the rainbow effect on the bubbles?
This is because light from the sun contains a range of colours all with different wave lengths that when together form white light.
These colours are:
Red, Orange, Yellow, Green, Blue, Indigo and violet
When the White light shines through the film of the bubble, the light is reflected and dispersed, splitting white light into its different wave length and showing all the colours!
Is it easier to blow big bubbles or small bubbles?
Do you think the film of soapy bubble water is more likely to break the bigger it is and more it stretches?
Do you think you could make different shaped bubbles, or do they always end up round?
Bubbles consist of a thin film of soapy water filled with air. When you blow a bubble, the film expands outward. The forces acting between the molecules of the bubble cause it to form the shape that encloses the most volume with the least surface area — a sphere. That is why all the shapes become a circle.
More bubble experiments
Baking Soda bubbles featuring in the Hangout from Inspiration Laboratories.
Bubbles in a lava lamp