Kitchen Chemistry: Rock Candy
- Clean 1 quart glass jar with wide mouth
- Kite string
- Paper clip
- Boiling water
- Fill the jar with sugar.
- Slowly pour the boiling water into the jar while stirring with a long-handled spoon until all the sugar is dissolved.
- Tie the paper clip to one end of the string and measure the height of the jar plus a few inches.
- Cut the string and tie the cut end to the pencil.
- Place the pencil across the mouth of the jar and roll the string around the pencil until the paper clip is just above the bottom of the jar.
- Place the jar on the kitchen window ledge.
- Rock candy crystals will grow on the string.
- The longer the string is in the jar, the larger the crystals will grow.
- From time to time, break up crystal formation on the jar and on the surface.
More on: Earth Science and Nature
From 365 Smart After-School Activities by Sheila Ellison & Judith Gray. Copyright © 2005 by Sheila Ellison & Judith Gray. All rights reserved. Used by arrangement with Sourcebooks, Inc.
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