This worksheet helps students practice distinguishing between physical and chemical properties through various examples and scenarios.

Let's solve each section of the Physical and Chemical Properties Worksheet step by step.

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A. Identify the following as physical (P) or chemical (C) properties.

| Property | Type |
|--------|------|
| blue color | P (Physical) – Color is observed without changing substance’s identity. |
| density | P (Physical) – Mass per unit volume; measurable without changing composition. |
| flammability (burns) | C (Chemical) – Involves combustion, a chemical reaction. |
| solubility (dissolves) | P (Physical) – Dissolving is a physical change (no new substance formed). |
| reacts with acid | C (Chemical) – A chemical reaction occurs. |
| supports combustion | C (Chemical) – Involves supporting a chemical reaction (burning). |
| sour taste | P (Physical) – Taste is a sensory property, not changing the substance. |
| melting point | P (Physical) – Phase change from solid to liquid. |
| reacts with water | C (Chemical) – Often results in a chemical reaction (e.g., rusting). |
| hardness | P (Physical) – Resistance to scratching; no chemical change. |
| boiling point | P (Physical) – Phase change from liquid to gas. |
| shine | P (Physical) – Luster or reflectivity; observable without altering substance. |
| odor | P (Physical) – Smell does not alter the substance. |
| reacts with air | C (Chemical) – Oxidation or other reactions occur. |
| sublimates | P (Physical) – Direct phase change from solid to gas (e.g., dry ice). |

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B. State whether each of the following is a physical or chemical property and the type of property.

| Description | Physical/Chemical | Type |
|-----------|-------------------|------|
| 1. Copper nitrate is a blue crystal | Physical | Color |
| 2. Two colorless solutions mix to give a yellow solid precipitate | Chemical | Reactivity / Precipitation Reaction |
| 3. Copper can be stretched into a thin wire | Physical | Ductility |
| 4. Copper metal reacts with nitric acid to make a brown gas | Chemical | Reactivity with acid |
| 5. Salt, sodium chloride, is a white crystal that melts at 801 °C | Physical | Melting point & Color |

> Explanation:
> - Physical properties describe characteristics that can be observed or measured without changing the substance’s chemical identity.
> - Chemical properties describe how a substance interacts with others to form new substances.
> - The "Type" column refers to the specific kind of property (e.g., color, ductility, reactivity).

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C. Write whether the following physical properties are intensive or extensive.

| Property | Intensive or Extensive? |
|--------|-------------------------|
| Temperature | Intensive – Does not depend on amount of substance. |
| Area | Extensive – Depends on size/surface area (increases with amount). |
| Ductility | Intensive – Inherent ability to deform under stress; same for any sample. |
| Height | Extensive – Depends on size of object (more material → greater height). |
| Solubility | Intensive – Amount dissolved per unit solvent; independent of quantity. |

> Definitions:
> - Intensive properties: Do not depend on the amount of matter (e.g., density, color, melting point).
> - Extensive properties: Depend on the amount of matter (e.g., mass, volume, length, area).

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✔ Final Answers:

#### A.
- blue color → P
- density → P
- flammability → C
- solubility → P
- reacts with acid → C
- supports combustion → C
- sour taste → P
- melting point → P
- reacts with water → C
- hardness → P
- boiling point → P
- shine → P
- odor → P
- reacts with air → C
- sublimates → P

#### B.
1. Physical – Color
2. Chemical – Reactivity / Precipitation
3. Physical – Ductility
4. Chemical – Reactivity with acid
5. Physical – Melting point & Color

#### C.
- Temperature → Intensive
- Area → Extensive
- Ductility → Intensive
- Height → Extensive
- Solubility → Intensive

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✔ This completes the worksheet! Let me know if you'd like this formatted for printing or need explanations in simpler terms.