We are learning to 'Predict, Observe and Explain' through Science.
In groups, we had a sealed bag full of water (some with food colouring) and predicted what would happen if we poked a skewer and pencil through it...
Then we tried it!
EXPLAIN: The plastic bag is made out of a material called Polymer. Polymers are long chains of individuals molecules called monomers.
(Mono = one. Poly = many. Mers = molecules.)
When you puncture these bags with a sharpened pencil, you're essentially separating the polymer chains without breaking them. The long chains of molecules than squeeze in tight around the surface of the pencil preventing any sort of leak.
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