3. State one basic difference between a chemical change and physical change
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Physical change and a chemical change?
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. ... Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input.
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PHYSICAL CHANGES
- The chemical composition of a substance does not change.
- Change is only in the state of matter and not in the chemical identity.
CHEMICAL CHANGES
- The chemical composition of a substance changes.
- Change is in chemical identity, but may or may not be in the state of matter.
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