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
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.