Changing properties

The video explains the chemical reactions that occur when baking a cake, highlighting how baking powder reacts to form carbon dioxide, which helps the cake rise. It contrasts these irreversible chemical changes with reversible physical changes, such as melting and solidifying chocolate, illustrating the differences between the two types of changes.

What distinguishes a chemical change from a physical change?

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Provide examples of physical changes and explain why they are reversible.

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