2. Describe four processes which cause a change in a substance or an object
using examples.
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Answer:
Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat. Change of composition - paper turning to ash when burned. Light and/or heat given off. Formation of gases, often appearing as bubbles in liquids.
Explanation:
Examples of Chemical Change in Everyday Life
Burning of paper and log of wood.
Digestion of food.
Boiling an egg.
Chemical battery usage.
Electroplating a metal.
Baking a cake.
Milk going sour.
Various metabolic reactions that take place in the cells.
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