Worksheet designed to help students distinguish between physical and chemical properties by analyzing descriptions and marking the correct category.

Let's go through each item on the Physical vs. Chemical Properties Worksheet and classify it as either a physical property or a chemical property, based on the definitions provided:

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🔹 Definitions Recap:

- Physical Property: Can be observed or measured without changing the substance’s chemical identity (e.g., color, density, melting point).
- Chemical Property: Describes how a substance interacts with other substances to form new substances (e.g., flammability, reactivity with acid).

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Now, let’s analyze each statement:

| Property Description | Physical Property | Chemical Property |
|----------------------|-------------------|-------------------|
| 1. sulfur is a yellow color | ✔ | |
| 2. density of Al is 2.70 g/cm³ | ✔ | |
| 3. wood is flammable | | ✔ |
| 4. solubility (dissolving) of food coloring in water | ✔ | |
| 5. metals react with acid to form hydrogen gas | | ✔ |
| 6. oxygen supports combustion | | ✔ |
| 7. bases taste bitter | ✔ | |
| 8. the melting point of water is 0°C | ✔ | |
| 9. metals can react with water to form a gas | | ✔ |
| 10. acids can react with a base in neutralization | | ✔ |
| 11. diamonds (made from C) are very hard | ✔ | |
| 12. water’s boiling point is 100°C | ✔ | |
| 13. non-metals do not conduct heat or electricity well | ✔ | |
| 14. metals are lustrous (shiny) | ✔ | |
| 15. methane gas is odorless until a chemical is added to it | ✔ | |
| 16. volume of water in a water balloon is 100 mL | ✔ | |
| 17. rust can form on the metal spokes of a bicycle | | ✔ |

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✔ Explanation for Each:

1. Sulfur is a yellow color
→ Observed by sight; no change in substance → Physical

2. Density of Al is 2.70 g/cm³
→ Measurable without changing aluminum → Physical

3. Wood is flammable
→ Involves burning (combustion), which changes wood into ash, CO₂, etc. → Chemical

4. Solubility of food coloring in water
→ Dissolving doesn’t change the chemical identity (just mixes) → Physical

5. Metals react with acid to form hydrogen gas
→ A chemical reaction occurs (e.g., Zn + HCl → ZnCl₂ + H₂) → Chemical

6. Oxygen supports combustion
→ Oxygen reacts with fuels during burning → Chemical

7. Bases taste bitter
→ Taste is a sensory observation; though tasting is risky, it’s still physical → Physical

8. Melting point of water is 0°C
→ Phase change (solid to liquid), but H₂O remains H₂O → Physical

9. Metals can react with water to form a gas
→ Example: Na + H₂O → NaOH + H₂ → New substances formed → Chemical

10. Acids react with a base in neutralization
→ Forms salt and water; chemical reaction → Chemical

11. Diamonds are very hard
→ Hardness is a physical characteristic → Physical

12. Boiling point of water is 100°C
→ Phase change without chemical change → Physical

13. Non-metals do not conduct heat/electricity well
→ Conductivity is a physical property → Physical

14. Metals are lustrous (shiny)
→ Appearance; observable without change → Physical

15. Methane is odorless until a chemical is added
→ Odor is a physical property; adding chemicals changes smell → Physical (the original property is odorless)

16. Volume of water is 100 mL
→ Measurement of space occupied → Physical

17. Rust can form on metal spokes
→ Iron oxidizes to form iron oxide (rust); new substance → Chemical

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✔ Final Answer Table:

| Property Description | Physical Property | Chemical Property |
|----------------------|-------------------|-------------------|
| 1. sulfur is a yellow color | ✔ | |
| 2. density of Al is 2.70 g/cm³ | ✔ | |
| 3. wood is flammable | | ✔ |
| 4. solubility of food coloring in water | ✔ | |
| 5. metals react with acid to form hydrogen gas | | ✔ |
| 6. oxygen supports combustion | | ✔ |
| 7. bases taste bitter | ✔ | |
| 8. the melting point of water is 0°C | ✔ | |
| 9. metals can react with water to form a gas | | ✔ |
| 10. acids can react with a base in neutralization | | ✔ |
| 11. diamonds are very hard | ✔ | |
| 12. water’s boiling point is 100°C | ✔ | |
| 13. non-metals do not conduct heat or electricity well | ✔ | |
| 14. metals are lustrous (shiny) | ✔ | |
| 15. methane gas is odorless until a chemical is added to it | ✔ | |
| 16. volume of water in a water balloon is 100 mL | ✔ | |
| 17. rust can form on the metal spokes of a bicycle | | ✔ |

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✔ Summary:
- Physical Properties: 1, 2, 4, 7, 8, 11, 12, 13, 14, 15, 16
- Chemical Properties: 3, 5, 6, 9, 10, 17

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