Both boiling and evaporation are processes where a substance changes state from a liquid to a gas. Which row in the table correctly describes a difference between boiling and evaporation?
| Boiling | Evaporation | |
|---|---|---|
| A | Occurs only at the surface of the liquid | Occurs throughout the entire liquid |
| B | No bubbles are observed in the liquid | Bubbles are observed rising to the surface |
| C | Occurs at a single fixed temperature | Occurs over a wide range of temperatures |
| D | Causes the temperature of the liquid to decrease | Keeps the temperature of the liquid constant |
Boiling: Occurs only at the surface of the liquid | Evaporation: Occurs throughout the entire liquid
Boiling: No bubbles are observed in the liquid | Evaporation: Bubbles are observed rising to the surface
Boiling: Occurs at a single fixed temperature | Evaporation: Occurs over a wide range of temperatures
Boiling: Causes the temperature of the liquid to decrease | Evaporation: Keeps the temperature of the liquid constant
313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.