13 Give cone word answer changes which take place any time known as
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Anytime a new substance is made, a chemical change takes place. Usually two or more materials are combined and a new substance is formed. A chemical change can produce amazing explosions, like fireworks. Some chemical changes are a little more difficult to spot, like when a nail rusts.
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Natural changes is the right answer.
it may be fast changes, periodic changes, non periodic changes, man made changes etc ....
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changes which take place any time by nature is called natural changes.
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