How could oxygen gas be used as rocket fuel?

Question: How could oxygen gas be used as rocket fuel?
- Keywords:
  oxygen,
  rocket fuel
Asked by Niamh to Matt, Lauren, Josh, Jo on 7 Nov 2017.
- Jo Collins answered on 7 Nov 2017:
  
  Thrust in rockets is created by burning a fuel and an oxidiser together. Oxygen can be used as the oxidiser in this mixture

Question: How could oxygen gas be used as rocket fuel?