observation sheet for experiment with icecube thread and salt
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- Fill the glass to the top with water.
- Cut a piece of string around 20 centimetres long.
- Place an ice cube in the water. It will float.
- Lay the string across the ice cube and glass.
- Cover ice cube and string with a layer of salt.
- Leave for one minute.
- Carefully pick up the ends of the string.
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