1. Color: The visual appearance of a substance, such as red, blue, or green.

2. Density: The mass of a substance per unit volume. This is a measure of how tightly packed the matter is.

3. Melting Point: The temperature at which a solid changes into a liquid.

4. Boiling Point: The temperature at which a liquid changes into a gas.

5. Solubility: The ability of a substance to dissolve in a solvent, such as water.

6. Hardness: The resistance of a solid to scratching or indentation.

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