Posted by: tpsciencefun | December 9, 2009

Chemical or Physical Change??

Kitchen science alert!! Time to put your jr. scientists to work with you in the kitchen.  The kitchen is the ultimate place to experiment with measuring, classifying (in the fridge and the cupboard), changing temperatures (boiling, freezing), making changes, using your five senses (tasting) to make observations and finally learning how to stay organized and clean up!!!

Is making a cake a chemical or physical change.  Is changing water from a liquid to a solid a physical or chemical change?  See if you can discover the answers.

Here’s a fun recipe for making your own play dough.  See if you can discover if making play dough causes physical or chemical changes.

 Ingredients:  

  • Water
  • Flour
  •  Salt
  • Vegetable Oil
  • Mixing Bowl
  • Spoon

Procedure:

  1. Pour 1 cup of water into the mixing bowl.
  2. Add 1/3 cup of flour, 1/3 cup salt, and 1 tablespoon of oil to the water.
  3. Mix, mix, mix.
  4. Store in an airtigh container and refrigeration helps keep it fresh even longer

Of course, if you want to add food coloring and scents it will make your play dough even more fun.

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