Friday, August 26, 2011

Tornado in a bottle and Water absorption @PSN

3 experiments were in store for us.
The apparatus we would be using.
All 3 experiments can be conducted at home as all the materials are readily available.
Ean squirting water into a petri dish
Fold paper along the dotted lines
To get a square
video
Place the folded paper into the water and observe how the paper unfolds as water is absorbed.
Bend at midsection but do not break the toothpicks

Arrange the toothpicks as above. Place 3 drops of water into the centre using a dropper.
video
Observe.
Fill a canister with water. Do not fill to the brim, allow some space for a few squirts of dish washing liquid.
Add in a few drops of food colouring.
We were given blue colouring. Cover the canister.
Shake and swirl the bottle. Observe the tornado. If the tornado is not visible, add in more detergent.
We had a bonus experiment.
The kids got to see a rubber glove expand using baking soda and vinegar

5 teaspoons of baking soda, a few squirts of vinegar, tie up the end of the glove quickly and Ean had himself a balloon :)

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