Name _________________________________________
Keller/Rosenzweig
Practice with Classifying Matter
Classification of Matter
Directions: Determine whether each example is a pure substance or a mixture. Then label it as
an element (E), compound (C), homogeneous mixture (HO), or heterogeneous mixture (HE).
Pure Substance or Mixture?
Example
E, C, HO, or HE?
Mixture
Sand
HE
Pure Substance
Salt
C
Pure Substance
Pure water
C
Mixture
Tap water
HO
Pure Substance
Aluminum
E
Mixture
Gasoline
HO
Mixture
Soda
HE
Mixture
An egg
HE
Pure Substance
Sugar
C
Pure Substance
Copper
E
Mixture
Steel
HO (alloy)
Pure Substance
Nitrogen
E
Mixture
Air
HO
Separation of Mixtures: Describe how to separate a mixture of ethanol (alcohol), water and
rocks. All substances must be collected and present at the end of the separation.
Rocks from ethanol & water – filtration
Ethanol from water – distillation (alcohol has lower boiling point and will be collected
separately)