Chemistry Quick Quiz

I am unsure whether this weeks blog post is the quick quiz or reflection on our class conversation. For this reason I am doing a little of both.

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

Reflection on Class Discussion:
Although I made a comment on class about the cost of makeup and wanting to use it prior to looking for healthier more sustainable option..... I actually haven't used the majority of my makeup products since that day. I am looking around for a make-up brand which connects more with my values and my budget. :)

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