Changes of State

Science — Second Preparatory

Evaporation and boiling

Comparison aspect	Main idea	Keywords
Evaporation	happens only at the surface of the liquid at any temperature and it is slow	happenssurfaceliquidtemperature
Boiling	happens throughout the liquid with bubbles forming in it and it occurs at a fixed temperature called the boiling point which is 100 °C for pure water under normal atmospheric pressure	happensthroughoutliquidbubbles
•	This is why washing hung outdoors in cold weather dries slowly while water in a hot pan evaporates much faster	washinghungoutdoorscold

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