What are physical changes? Give 5 examples.
The chemical composition of a substance does not change.
Most changes are reversible
No new substances are formed. For example,
Ice → Water → Steam
- Water evaporation and condensation
- Glowing of bulb when current flow.
- Recycling of plastic
- Recycling of papers
- Melting of wax
- Adding silica in water
- Recasting iron from one form to other form
- Adding table salt in water
- Use of solar energy
- Painting of walls