Question

define a physical change

Answer 1

A physical change is a type of change that affects one or more physical properties of a substance without altering its chemical composition. During a physical change, the form or appearance of the substance may change, but its internal structure, identity, and chemical properties remain the same. Common examples of physical changes include:

- Melting of ice into water
- Boiling of water into steam
- Dissolving salt in water
- Breaking a glass
- Chopping wood

These changes can often be reversed, such as freezing water back into ice or evaporating steam back into water.