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Which action changes the identity of the substance referenced? running an electric current through copper burning wood melting gold breaking an ice cube Help please !
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Which action changes the identity of the substance referenced?

running an electric current through copper
burning wood
melting gold
breaking an ice cube
Help please !

User Radman
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5.4k points

2 Answers

12 votes
Burning wood would be the answer
User Jbtule
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5.0k points
4 votes
Burning wood, it is a chemical reaction and the only option that actually changes the composition of the substance. The burnt would cannot change back into normal wood now
User Bwegs
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4.7k points
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