Here are some examples:
* Sight: Color, shape, size, texture
* Smell: Aroma, fragrance, odor
* Taste: Sweet, sour, salty, bitter, umami
* Touch: Temperature, texture, hardness, softness
* Hearing: Sound, pitch, volume
Important Note: Observable properties are often referred to as physical properties because they can be measured and described.
Let me know if you'd like me to expand on any of this!