uh right...
1) Its one of the five basic elements. It is common in konoha and is an affinity nature type of the uchiha.
2) It is the rapid oxidation of a material in the exothermic process of combustion.
3) Fire is strong against wind but, weak against water.
4) Sasuke, Jiraiya, and Hiruzen
5) lava release - fire + earth and boil release - fire + water