Fact 1: Condensing means changing from a gas into a liquid by reducing heat energy.

Fact 2: Water can easily condense on the cold end of the probe.

Given the two facts above, answer the question "What can be a gas or a liquid?" with the following options: 
- Alcohol
 - ozone
 - water
 - vapors
 - heat
 - blood
 - NaCl
 - shale


 

   water      