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Saturday 26 October 2013

How to make rock candy

What you'll need:

- a measuring cup
- a tall glass
- a kettle
- a spoon
- a pencil
- some thread
- a paper clip
- some sugar

Instructions:

1. Pour a cup of water into a kettle and bring it to a boil.

2. Put the cup of hot water back into the measuring cup.

3. Pour in 1/2 cup of sugar and stir with the spoon to make sure it is completely dissolved.

4. Pour the sugar water solution into a small glass.

5. Tie one end of the thread around the middle of the pencil and the other end to a paper clip. Lay the pencil across the top of the glass so that the thread hangs down into the glass and the paper clip is in the solution.

6. Set the glass on a shelf where it will stay warm. Let it stay there for three or four days. Do not cover the glass.

7. After a few days you can shine a light on the glass to see the crystals.

8. Crystals will form on the side of the glass, the string, the pencil and the paper clip.

9. Students can taste small bits of crystal.

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