Give an example each of a useful physical change and chemical change. Explain how they are useful.
HOW ARE THEY USEFUL?
Answers
Answer:
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding
Explanation:
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Answer:
Physical change :
)An ice cube melting into water in your drink.
)Freezing water to make ice cubes.
Chemical change :
)Burning of paper and log of wood.
)Digestion of food.
Explanation:
Explain how they are useful.
→ Combustion happens whenever we burn fossil fuels, rusting occurs when iron is left exposed to air and water, and batteries use chemical reactions to create electricity. We use chemical reactions to cook, clean, and drive places and our bodies use them every moment of every day to keep us alive.
Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds. Physical changes occur when objects or substances undergo a change that does not change their chemical composition.
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