Free Printable Physical and Chemical Properties and Changes Worksheets - Free Printable

Here's the complete solution to the Physical and Chemical Properties Worksheet, with explanations for each section.

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

| Property | Type |
|---------------------------|------|
| blue color | P |
| density | P |
| flammability (burns) | C |
| solubility (dissolves) | 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 |

✔ Explanation:

- Physical properties (P) can be observed or measured *without changing the substance’s chemical identity*. Examples: color, density, melting point, odor, solubility, hardness, shine, sublimation.
- Chemical properties (C) describe how a substance *reacts or changes into a new substance*. Examples: flammability, reactivity with acid/water/air, supporting combustion.

> 💡 Note: “Sublimates” is physical — it’s a phase change (solid → gas), no new substance formed.

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

| Description | Physical/Chemical | Type |
|-----------------------------------------------------------|-------------------|-------------------------------|
| 1. Copper nitrate is a blue crystal | Physical | Color / Appearance |
| 2. Two colorless solutions mix to give a yellow solid precipitate | Chemical | Reactivity / Formation of precipitate |
| 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 |
| 5. Salt, sodium chloride, is a white crystal that melts at 801 °C | Physical | Color & Melting Point |

✔ Explanation:

1. Blue crystal → observable appearance → Physical → Color
2. Formation of yellow precipitate → new substance formed → Chemical → Reactivity/Precipitation
3. Stretched into wire → ability to deform without breaking → Physical → Ductility
4. Reacts with acid to form gas → chemical reaction → Chemical → Reactivity
5. White crystal + melting point → both observable without changing identity → Physical → Color & Melting Point

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

| Property | Intensive or Extensive? |
|--------------|--------------------------|
| Temperature | Intensive |
| Area | Extensive |
| Ductility | Intensive |
| Height | Extensive |
| Solubility | Intensive |

✔ Explanation:

- Intensive properties do NOT depend on the amount of matter.
- Example: Temperature, color, density, solubility, ductility — these are the same whether you have a gram or a kilogram.
- Extensive properties DO depend on the amount of matter.
- Example: Area, height, mass, volume — these change if you change the size/amount.

> 🧠 Quick Tip: If you cut the sample in half, does the property change? If yes → extensive. If no → intensive.

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## ✔ Final Answer Summary:

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
5. Physical – Color & Melting Point

C:

- Temperature: Intensive
- Area: Extensive
- Ductility: Intensive
- Height: Extensive
- Solubility: Intensive

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