Ooblek

Last week, we used cornflour and water to make ooblek.  We examined what happened when we stirred the mixture quickly & slowly, when we squeezed the mixture, when we let it drip through our fingers.  It was a really strange experience.  We found out that it was all because of the shape molecules that the corn flour is made from - it is a bit like quicksand! The faster or harder you mix the liquid, the shape of the molecules, means that the liquid 'locks up' and turns into a solid.

This was such a fun experiment! And definitely one that you can try at home - but outside!