What are asteriods and meteors made of?

Question: What are asteriods and meteors made of?
- Keywords:
  asteroid,
  meteor
Asked by danandcallum123 to Ed, Hayley, Jason, Nathan, Sophie on 13 Mar 2013.
- Hayley Evers-King answered on 13 Mar 2013:
  
  Rock (with different chemical compositions which can tell us a bit about their history) or sometimes Iron.

Question: What are asteriods and meteors made of?