Exercise A Making Plastic

  1. Use cornstarch since it is mostly amvlopcctin, the branched form of starch.
  2. The material acts like a liquid when stirred slowly and a solid when stirred quickly. It is difficult to move the spoon dirough when stirring quickly bccausc there is not enough time for the branched amvlopcctin mol-cculcs to rearrange themselves.
  3. The ratio of water to starch is critical. If there is too much water, the starch will always flow easily. Adjust the watcnstarch ratio if there are difficulties showing the fluid or solid nature of the starch.

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