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

Fact 2: Heat is caused by vibrations of the atoms and molecules of substances.

Given the two facts above, answer the question "To identify that liquid 's boiling point requries" with the following options: 
- vibrations of the atoms
 - kinetic energy
 - degrees Celsius
 - The bending of a ray of light
 - degrees celcius
 - Evaporation of water
 - evaporative cooling
 - fissures of hot, acidic water


 

 vibrations of the atoms        