Monday 18th April 2016.
We decided to blow bubbles. We used pipe cleaners to make different shaped blowers.
Jepearl: “We made rectangles and triangles and squares.”
Ava: “We made circles.”
Alex: “And love hearts.”
Some of the children thought if we used a square bubble wand, that it would produce a square/cube shaped bubble.
Lleyton: “We thought it would be the same shape.”
Harry: “I thought it would be the same, I thought if it was a triangle and you blow through it, it will turn into a triangle.”
We dipped our bubble wands into the mixture. This is what happened…
Finley: “They were all spheres.”
Lleyton: “The air makes them all spheres because when you blow it, the air goes in and it’s like a circle but it’s a sphere.”
Connor: “The blower is a circle and it comes out like a sphere. It’s supposed to be a sphere.”
Alex: “Because the air is inside it and the circle makes it happen.”
Logan: “There is a circle on the blowing bit and when you blow it turns into a sphere.”
We talked about the air inside a bubble pushing out equally – which created a sphere shape.
We used the internet to find out more.
Chloe: “We can use google.”
Harry: “I saw google on my tablet.”
This is what we found out – Why is a bubble round? Bubbles can stretch and become all kinds of crazy looking shapes. But if you seal a bubble by flipping it off your wand, the tension in the bubble skin shrinks to the smallest possible shape for the volume of air it contains. That’s why even if it had a goofy shape before you sealed it, once sealed shut, the bubble will shrink into a sphere shape. Compared to any other shape, a sphere has the smallest surface area for the amount of volume.
We had lots of fun exploring bubbles. We might have a competition to see who can blow the biggest bubble!