* Density: This is a measure of how much mass is contained in a given volume. It's often expressed as grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

* Color: This is the way an object appears to our eyes due to the wavelengths of light it reflects. While this can be influenced by external factors like lighting, it's a fundamental property of the material itself.

Let me know if you'd like to explore other physical properties!