- Carbon has three isotopes with atomic mass number 12, 13, 14.
- Presence of water droplets at the outer surface of chilled glass water indicates the physical phenomenon of condensation.
- Contaminated water destroys aquatic life and reduces its reproductive ability.
- “Boiling of water” is an example of physical change.
- During a physical change the chemical composition of substance does not change.
- Cutting fruits and melting of wax are the example of physical change.
- The properties of physical changes are temporary and reversible.
- “Burning of page” is an example of physical change.
- The red color of rose turns brown. It is a chemical change.
- “Breaking of wood stick” is an example of physical change.