First Class

We made a Hovercraft!

Materials

Old CD

Water bottletop

Silicon (glue won’t stick bottle top to CD)

Balloon

Method

We used silicon glue to stick the water bottle top to CD.

We blew up the balloon and fitted the neck of the balloon over the closed bottle top.

Once fitted we started hovering!We discovered the hovering lasted longer when we placed tape underneath the bottletop.

We pierced the tape and this allowed the air flow to slow down and the hovering lasted longer.

Iodine Clock Reaction

Materials

Corn Flour

Vitamin C effervescent tablets

3% Hydrogen Peroxide

Iodine

Plastic containers

It is called a clock reaction because you can change the amount of time it takes for the liquids to turn blue.  The chemistry bit involves a battle of chemistry between the starch which is trying to turn the iodine blue, and the Vitamin C which is keeping it from turning blue. Eventually the Vitamin C loses and, bam! – you get instant blueness.

Look!

Colour Display in a Tray of Milk

Materials

Full fat milk, dish soap, 3 types of food colouring

We poured the milk onto a tray, added the food colouring. We then added the fairy liquid which goes after the fat in the milk and breaks it down. This causes the food colouring to scatter and mix and give off a display of colours.

Fizz Inflator

Materials

One small empty plastic soda or water bottle

1/2 cup of vinegar

Small balloon

Baking soda

Funnel (made from card)

We used the funnel to fill  the balloon more than half way with baking soda.

We carefully put the neck of the balloon all the way over the neck of the bottle without letting any baking soda into the bottle.

We then lifted the balloon up so that the baking soda fell from the balloon into the bottle and mixed with the vinegar.

We watched the Fizz Inflator at work!!