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3 Cards in this Set
- Front
- Back
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Reversible changes are temporary changes |
Reversible changes can be reversed to obtain original substance.
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Folding of paper is a physical change while burning of paper is a chemical change |
When paper is folded no new substances produced .this it is a physical change ...... When paper is burnt a new substance that is ash is formed . |
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Hot air rises on heating . |
Air expands on heating . Due to expansion molecules of air spread . This increase the distance among the air particles . This makes the hot air lighter. The light hot air rises. |
