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Materials Required
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2 cups of water,
1 tablespoon of salt,
A refrigerator to freeze.
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Method
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- Take 1 cup of water and add salt.
- Then put both the cups of water in the refrigerator and freeze.
- Check from time to time to find out which freezes first.
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What is Learnt
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* Salt decreases the freezing temperature of the water.
* This is the reason why lakes and streams freeze in very cold temperatures, but an ocean containing salt water is always free flowing.
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Conclusion
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The cup of salt water freezes later than the cup of plain water.
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Flash Cards
