What is a change
Define each typss
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there are many types of changes chemical change and physical change
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Conversion of one form to another is called change.
The different types of changes are as follows:
1) reversible change: change that can be reversed by reversing the change is called reversible change. For example: melting of ice
2) irreversible change: change that cannot be reversed. For example: burning of paper
3) desirable change: changes that are useful to human beings. For example: cooking of food.
4) undesirable change: change that is harmful to humans. For example: rusting of iron.
5) physical change: change in which no new substance is formed. For example: sublimation
6) chemical change: change in which new substance is formed. For example: respiration.
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