Odor is generated when substances change composition. A very common example is rotting of eggs, that have a very different odor from fresh eggs. During the process of rotting, chemical reactions take place and egg's composition changes.
Signs of chemical change include the release of bubbles, a change of color, production of an odor, release of heat and light, and production of loud sounds. Because chemical changes result in different substances, they often cannot be undone
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Answer:
Odor is generated when substances change composition. A very common example is rotting of eggs, that have a very different odor from fresh eggs. During the process of rotting, chemical reactions take place and egg's composition changes.
Explanation:
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Answer:
Signs of chemical change include the release of bubbles, a change of color, production of an odor, release of heat and light, and production of loud sounds. Because chemical changes result in different substances, they often cannot be undone