What is the difference between Effect and Affect?

Affect: Verb
Effect: Noun

English  language is grammatically  divided into 8 categeries:
1.Noun :name
2.Adjective :toward noun
3.Conjuction :join
4.Verb :action
5.Adverb:
6.Interjective:
7.Pronoun: for , in place of noun
8.Perposition :


so, solution lies in identifying whether your sentence need Verb( pivotal point of the  sentence) or Noun