Fact 1: Heating a liquid can be used to identify that liquid 's boiling point.

Fact 2: Boiling is the conversion of a liquid to a gas.

Given the two facts above, answer the question "What can be learned from heating a liquid?" with the following options: 
- The bending of a ray of light
 - When it becomes a gas
 - chemical equations
 - When it becomes a solid
 - kinetic energy
 - When its mass increases
 - When it condenses
 - matter vibrating


 

  When it becomes a gas       