1. Classify the following as either a chemical or physical change.
Crushing a rock = physical change
Dissolving sugar in water = "When water dissolves sugar, it interacts with the sugar but does not change it."
Burning wood = chemical change
Crushing a rock = physical change
Dissolving sugar in water = "When water dissolves sugar, it interacts with the sugar but does not change it."
*What?
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 = mixture
sugar = pure (mmmmmm)
steel = mixture
3. A cup of black coffee is considered to be __?__ and a/an __?__ substance.
Coffee is homogenous and 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.
water boiling is a physical change and the temp at which it boils is a physical property.
2. Classify the following as to whether or not they are pure substances or mixtures.
milk = mixture
table salt = mixture
sugar = pure (mmmmmm)
steel = mixture
3. A cup of black coffee is considered to be __?__ and a/an __?__ substance.
Coffee is homogenous and 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.
water boiling is a physical change and the temp at which it boils is a physical property.
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