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Which process is an example of a physical change?

Electricity breaks down water into hydrogen and oxygen gases.
Limestone breaks down into lime and carbon dioxide when heated.
Carbon combines with oxygen to form carbon dioxide gas.
Ice turns to water when heated over a Bunsen burner.

User Sakthig
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The process that is an example of a chemical change would be of ice turning into water when heated over a Bunsen Burner.
User TheCat
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