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    By Gina TX

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    This one too, the kids love it.

    Put food coloring in water - physical change

    Add bleach (about 10 mL) - chemical change. It takes a few minutes but the water will go back to clear.

    Baking soda in water - physical change (solubility)

    Baking soda in vinegar - chemical change.

    If you have a flask or a bottle of water you can do this one and right after you add the baking soda put a balloon over the top and as it mixes the gasses will blow up the balloon. You can also do this with water and baking soda and they can see that nothing happens to the ballon.

    View the original thread this idea was posted on



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