CHEMICAL and PHYSICAL PROPERTies
Chemical properties
They are observed only after chemical change occurs. Examples: acidity, basicity, combustibility, resistance to corrosion |
Physical properties
They are measured or observed without changing the identity of material. Examples: colour, melting point, boiling point, density |
chemical or physical property?
TEST yourself
Physical change or chemical change?
- Boiled egg
- Cooking bread
- Dry ice "melting"
- Evaporating water from salt water to recover salt
- Fireworks exploding
- A mobile phone battery producing electricity
- Mixing ingredients to make a pancake batter
- Cooking the batter in a pan
- A candle burning
- Photosynthesis
- Dissolving sugar in a cup of tea
- Respiration