- Boiling means a substance changes from a liquid into a gas by increasing heat energy
- Boiling happens when liquids are heated above their boiling point
- A liquid is a kind of substance
- Therefore, the substance will change from liquid to gas when it is heated over its boiling point

Hence, the substance will change from liquid to gas when it is heated over its boiling point
Question
What happens at the boiling point of a substance?

Context
- Boiling means a substance changes from a liquid into a gas by increasing heat energy 
- Boiling happens when liquids are heated above their boiling point 
- A liquid is a kind of substance