1. Classify the following as either a chemical or physical change. 

Burning wood-The burning of a substance is a chemical change.

Crushing a rock-The crushing of a rock is a physical change.

Dissolving sugar in water-If the water is evaporated, the sugar will be recovered, therefore this is a physical change.

The rusting of iron-This is a chemical change.

 2. Classify the following as to whether or not they are pure substances or mixtures.

milk- mixture

table salt- mixture

sugar- pure substance

steel- mixture

3. A cup of black coffee is considered to be __?__ and a/an __?__ substance.



 Homogenous-Impure

4. The boiling of water is considered to be a __?__ change and the temperature at which water boils is considered to be a __?__ property.

Physical-Physical