Final Answer:
A.
1. Physical property — Odor
2. Physical property — Density
3. Chemical property — Flammability
4. Chemical property — Reactivity with fungi (biological decay)
5. Physical property — State of matter
B.
- Silver spoons dull and black spots: Chemical change — Evidence: New substance (tarnish, silver sulfide) formed.
- Wire coiled into spring: Physical change — Evidence: Shape changed, but material is still the same metal.
- Food color in water: Physical change — Evidence: Color spreads, but no new substances; reversible by evaporation.
- Fireworks explode: Chemical change — Evidence: Light, heat, sound, and gases produced — new substances formed.
- Chewing food: Physical change; starch to sugars: Chemical change
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Parent Tip: Review the logic above to help your child master the concept of worksheet on chemical vs physical properties and changes answer key.
