Name: ______Date: ______Period:____
WS Types of Matter
1. Classify the following as pure substances (p) or mixtures (m).
a) tap water ______d) vegetable oil ______
b) nitrogen gas (N2) ______e) table sugar (C12H22O11) ______
c) peanut butter ______f) orange juice ______
2. Identify the following mixtures as either a homogeneous (solution) or heterogeneous.
a) table salt dissolved in water ______
b) carbon mixed with sand ______
c) brass (alloy of copper and zinc) ______
d) fresh squeezed lemonade with pulp ______
e) vegetable soup ______
3. Read each of the following descriptions, then determine if the substance described in each case is
Element , Compound , Homogeneous Mixture , Heterogeneous Mixture. Explain your choice.
a) A cloudy white liquid is left to stand for several hours. At the end of this time, the top of the
liquid is clear and there is a clump of white solid at the bottom of the liquid.
______because ______
______
b) A clear, colorless liquid is heated. Some of it boils away (evaporates) at 25 oC, then the rest boils
away at 100 oC.
______because ______
______
c) When heated strongly, a pure green solid decomposes into a white solid and a colorless gas.
______because ______
______
d) A pure yellow solid appears cannot be broken down into other substances chemically.
______because ______
______
4. Complete the following table by putting ONLY 1 check mark for each sample of matter.
Hint: If a chemical formula is given, it’s a pure substance so choose element or compound.
If no formula is given, it’s a mixture so choose solution (homogeneous) or heterogeneous.
Matter / Chemical formula(if available) / Pure substance / Mixture
Element / Compound / Solution
(homogeneous mixture) / Heterogeneous mixture
Aluminum foil / Al
Carbon monoxide / CO
Air
Chalk / CaCO3
Chocolate chip cookie
Orange juice (no pulp)
Charcoal / C
Chlorine gas / Cl2
Copper / Cu
Diamond / C
Salad dressing
Iron / Fe
Rock
(like granite)
Lead / Pb
Salt water
Chocolate
Distilled water / H2O
Flat soda
Sodium / Na
Vinegar