Affect means to influence as in, “The rain affected Amy’s curly hair.”
(Sometimes “affect” is used as a noun to describe facial expression.)
Effect means a result as in, The rain had no effect on Emily’s silky hair.
(Sometimes “effect” is used a a verb that means to make happen or real.)
“Effective” is an adjective that means to produce intended results.
“Affective” is an adjective that means to be able to influence the thinking of someone.
Most of the time, “affect” is used as a verb and “effect” is used a noun.