Fact 1: If gas is heated then that gas will expand.

Fact 2: Nitrogen gas is the most abundant gas in the atmosphere.

Given the two facts above, answer the question "What does nitrogen do when it's heated" with the following options: 
- Expands
 - boiling
 - moves
 - Solidifies
 - Melts
 - heat
 - burning
 - Condenses


 

 Expands        