1. Burning wood - chemical change
Crushing rock - physical change
Disolving sugar in water - physical change
The rusting of iron - chemical change
2. Milk is a mixture
Table salt is a mixture
Sugar is a pure substance
Steel is a mixture
3. A cup of black coffee is homogenous and impure
4. The boiling of water is a physical change and the temperature at which is boils is a physical property.
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