Physical and Chemical Changes and Properties worksheet with illustrations and questions for identifying types of changes and properties.

It looks like you've uploaded a worksheet titled "Physical and Chemical Changes and Properties" that includes two parts:

- Part A: Identifying whether given properties are physical or chemical.
- Part B: Determining if described changes are physical or chemical.

Since I can't view images directly, I’ll solve the problem based on the typical content of such worksheets. Below is a complete solution with explanations for each item, assuming standard examples commonly found in this type of worksheet.

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✔ Part A: Physical or Chemical Property?

A physical property can be observed or measured without changing the substance’s chemical identity (e.g., color, density, melting point).
A chemical property describes how a substance interacts with other substances to form new substances (e.g., flammability, reactivity).

Let’s go through common examples:

1. Color → Physical
*Explanation:* Color can be seen without changing the substance.

2. Flammability → Chemical
*Explanation:* Flammability involves burning (combustion), which creates new substances.

3. Density → Physical
*Explanation:* Density is mass/volume; no chemical change occurs.

4. Texture → Physical
*Explanation:* Texture (smooth, rough) is observable without altering composition.

5. Solubility → Physical
*Explanation:* Dissolving sugar in water doesn’t change its chemical identity (it's still sugar).

6. Ability to rust → Chemical
*Explanation:* Rusting is an oxidation reaction forming iron oxide — a new substance.

7. Odor → Physical
*Explanation:* Smell is a physical characteristic (molecules in air).

8. Boiling point → Physical
*Explanation:* Boiling changes state but not chemical identity.

9. Reactivity → Chemical
*Explanation:* Reactivity refers to how a substance reacts with others (e.g., sodium + water → explosion).

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✔ Part B: Physical or Chemical Change?

A physical change alters form but not composition (e.g., cutting, melting).
A chemical change produces new substances (e.g., burning, cooking).

Now, let’s analyze the listed changes:

1. Melting ice cream → Physical
*Explanation:* Ice cream changes from solid to liquid, but it's still ice cream.

2. Frying an egg → Chemical
*Explanation:* Heat denatures proteins; irreversible change; new structure formed.

3. Crushing a can → Physical
*Explanation:* Shape changes, but aluminum remains aluminum.

4. Cutting hair → Physical
*Explanation:* Only size/shape changed; no new substance.

5. Burning wood → Chemical
*Explanation:* Wood turns into ash, CO₂, and water vapor — new substances.

6. Dripping your lunch → Physical (assuming it's just liquid falling)
*Explanation:* If no reaction happens, it's just a physical movement.

7. Cooking your lunch → Chemical
*Explanation:* Cooking often involves reactions (browning, coagulation of proteins).

8. Freezing your vegetables → Physical
*Explanation:* Water inside freezes; no chemical change (unless over time).

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✔ Final Answer Summary:

#### Part A:
1. Physical
2. Chemical
3. Physical
4. Physical
5. Physical
6. Chemical
7. Physical
8. Physical
9. Chemical

#### Part B:
1. Physical
2. Chemical
3. Physical
4. Physical
5. Chemical
6. Physical
7. Chemical
8. Physical

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📌 Key Takeaways:

- Physical changes involve state, shape, size — no new substances.
- Chemical changes involve new substances, often indicated by color change, gas production, odor, or irreversibility.

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