Science Week 2010

Bubbles Magic
To celebrate Science Week a Magic Bubbles show came to our school on Thursday the 18th of November. We learned lots of scientific information about bubbles.
 We learned that bubble mixture is made up of 95% water, 4% glycerine and 1% washing up liquid.
We discovered that the molecules of the bubble liquid are stretchy. The bubble liquid stretches across the hole in the wand and when we blow over the hole the bubble solution stretches without breaking. If we dipped the wand into a bucket of water we couldn’t make bubbles because the molecules of water cling together and do not stretch like the bubble mixture.
We learned that the bubble film is very flexible and that a bubble can bounce off the liquid in the bubble frame!
We learned that bubbles always try to make the smallest shape which is a sphere. We tested this theory by using different shaped wands (star, triangle, square) to make bubbles. Each time the bubble formed into a sphere shape regardless of the shape of the wand used to form the bubble.
 We saw that a bubble can be kept from falling by pushing air up from the bottom; this causes the bubble to shake and jiggle before once again forming its original sphere shape.
We learned how we can create a bubble around another bubble, using two different sized bubble frames.  
We learned how to make a bubble float and rise, just like a balloon by filling it with helium.
We saw how light reflects off a bubble and creates the 7 colours of the rainbow; red, orange, yellow, green, blue indigo, violet. We can tell when a bubble is about to burst by looking at the colour  on the bubble changing from indigo to blue to yellow. It changes colour  because the liquid that formed the bubble is thinning!
 We had great fun learning all about bubbles and we are looking forward to doing lots more science investigations during the year.