Question

physical science review: matter and change
classifying matter
all matter can be classified as either
a substance (element or compound)
or a mixture (heterogeneous or
homogeneous).
classify each of the following by placing a check in all categories that apply.

matter	mixture	hetero	homo	substance	element	compound
2. water
3. soil
4. sugar water
5. oxygen
6. carbon dioxide
7. chocoate chip ice cream
8. rubbing alcohol
9. pure air
10. iron
11. table salt
12. vegetable soup
13. gold
14. flat soda
15. whole milk
16. italian salad dressing

Explanation:

Step1: Define matter categories

• Element: Pure substance, single type of atom.
• Compound: Pure substance, 2+ bonded atoms.
• Heterogeneous mixture: Non-uniform composition.
• Homogeneous mixture: Uniform composition.

Step2: Classify each matter item

1. Chlorine: Pure element (Cl, single atom)
2. Water: Pure compound ($H_2O$, 2 elements bonded)
3. Soil: Heterogeneous mixture (non-uniform components)
4. Sugar water: Homogeneous mixture (uniform sugar + water)
5. Oxygen: Pure element ($O_2$, single type of atom)
6. Carbon dioxide: Pure compound ($CO_2$, 2 elements bonded)
7. Chocolate chip ice cream: Heterogeneous mixture (visible chips, non-uniform)
8. Rubbing alcohol: Homogeneous mixture (uniform isopropyl alcohol + water)
9. Pure air: Homogeneous mixture (uniform gas blend)
10. Iron: Pure element (Fe, single atom)
11. Table salt: Pure compound (NaCl, 2 elements bonded)
12. Vegetable soup: Heterogeneous mixture (visible veggies, non-uniform)
13. Gold: Pure element (Au, single atom)
14. Flat soda: Homogeneous mixture (uniform sugar + water + dissolved gases)
15. Whole milk: Heterogeneous mixture (undissolved fat particles, non-uniform)
16. Italian salad dressing: Heterogeneous mixture (separated oil + vinegar, non-uniform)

Answer:

Matter	Mixture	Hetero	Homo	Substance	Element	Compound
2. water				✓		✓
3. soil	✓	✓
4. sugar water	✓		✓
5. oxygen				✓	✓
6. carbon dioxide				✓		✓
7. chocolate chip ice cream	✓	✓
8. rubbing alcohol	✓		✓
9. pure air	✓		✓
10. iron				✓	✓
11. table salt				✓		✓
12. vegetable soup	✓	✓
13. gold				✓	✓
14. flat soda	✓		✓
15. whole milk	✓	✓
16. Italian salad dressing	✓	✓