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Home School Life Journal ................................................................................................................painting by Katie Bergenholtz

Gelatin Disks

We looked at our cups that we had put a mystery liquid and a mystery solid in to see how it might have changed. They could see that the liquid could not pour out because the mystery solid was still in the liquid. It cannot be seen because it has dissolved in the liquid, but one way to know it's there is to see how it has changed the liquid and made it so it can no longer pour. We talked about how not all solids change liquids in this way when they dissolve, but this particular mystery solid does.
By now they had guessed that the mystery solid was gelatin, and they were allowed to eat their homemade gel-o. Next we made another solution, but this time we used a lot of gelatin powder and only a little water. I challenged them to predict what would happen, and they all guessed that it would make an even thicker mixture.

They mixed their gelatin in a small amount of water in a plastic lid. When the powder was dissolved they added food coloring and gently turned their tops so that the coloring swirled slowly in the solution. This made their solutions look more interesting.

And here they are once they have been thoroughly dried.
You just carefully peel them from the lids.
Pretty, aren't they?


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5 comments:

  1. I'm pretty sure an entire science unit could be found in a box of gelatin :)

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  2. Gelatin science experiments...fun!

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  3. I've never tried sticking jello to the window. That's another science lesson altogether!

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  4. LOL! They are really hard similar to a thin, somewhat brittle plastic. I have them attached to the window with clear tape. They are not sticky at all once they have dried.

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  5. I didn't know it stuck to the window. That would make sense since it sticks to the pan so much.

    But like you said not once they've dried.

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