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| first sign to look for is a color change As in the case of autumn leaves, a change in color is a clue to indicate a chemical change. | |
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| When you bake a cake, energy is absorbed by the batter as it changes from a runny mix into a cake. Or the bursting of fireworks, they release energy in the from of light | |
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| It only takes one experience with a rotten egg to learn that they smell different from fresh eggs. When eggs and food spoil, they undergo a chemical change. The odor change is a chemical change | |
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