CHEMISTRY: WEEK 1 QUIZ RESULTS

1. Classify the following as either a chemical or physical change. 
Burning wood-chemical change
Crushing a rock-physical change
Dissolving sugar in water-physical change
The rusting of iron-chemical change
2. Classify the following as to whether or not they are pure substances or mixtures. 
milk-mixture
table salt-pure substance
sugar-mixture
steel-mixture
3. A cup of black coffee is considered to be __?__ and a/an __?__ substance. 
(d) non-homogeneous�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. 

(d) physical�..physical



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