Fact 1: Boiling means change from a liquid into a gas by adding heat energy.

Fact 2: Water is heated to the boiling point and changes to steam.

Given the two facts above, answer the question "What does water turn into after boiling?" with the following options: 
- gas
 - Dew
 - lake
 - solid
 - oxygen
 - liquid
 - oil
 - salt


 

 gas        