1b) Make separate list of properties of objects that can be identified and cannot be identified by observation only.

Properties of Objects That Can Be Identified by Observation Only

(Using senses or tools directly without deeper analysis)

Physical Properties:

• Shape (e.g., circular, rectangular)
• Size (relative or measurable dimensions like small, large, tall)
• Color (e.g., red, blue, transparent)
• Texture (e.g., smooth, rough, sticky)
• State of Matter (solid, liquid, gas)
• Luster (e.g., shiny, dull)
• Opacity (opaque, translucent, transparent)
• Smell (e.g., sweet, pungent)
• Sound (e.g., loud, soft, pitch)
• Temperature (relative warmth or coldness felt by touch)
• Motion (whether it is moving or stationary)

Quantifiable Properties with Instruments:

• Length or Height (measurable with rulers or similar tools)
• Volume (observable using containers or water displacement)
• Weight (observable using scales)

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Properties of Objects That Cannot Be Identified by Observation Only

(Require additional testing, experimentation, or context)

Chemical Properties:

• Flammability (ability to burn in oxygen)
• Reactivity (how it reacts with acids, bases, or other substances)
• Toxicity (harmful effects on organisms)
• pH Level (acidic, neutral, or basic nature)
• Oxidation State (tendency to gain or lose electrons)

Intrinsic Properties:

• Density (requires mass and volume calculation)
• Melting/Boiling Point (needs controlled heating)
• Electrical Conductivity (testing needed with a circuit)
• Thermal Conductivity (ability to transfer heat)
• Hardness (requires scratching or resistance testing)
• Magnetic Properties (needs interaction with a magnet)

Behavioral/Functional Properties:

• Elasticity (requires applying force to observe deformation and recovery)
• Strength (needs testing under stress or load)
• Durability (requires observation over time or repeated use)
• Biodegradability (requires time to observe decomposition)

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Conclusion:

• Observable Properties focus on what is apparent through senses or direct measurement.
• Non-Observable Properties require additional experimentation or tools to identify specific characteristics.

                                    ✍👉 Prosperous team