Question

Which of the following is a result of a physical change?

1. A newspaper burns when placed in a fire.
2. An iron chair rusts when left outside.
3. A sample of water boils and releases gas.
4. A plant changes carbon dioxide and water into sugar.
5. Electricity is used to split water molecules into hydrogen and oxygen.

Answer 1

Answer: A sample of water boils and releases gas.

Explanation: When water boils it evaportates but it is still water so this is a psysical change

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