Mood vs emotions

Mood and emotions are different. Mood is for a prolonged time. It's behaviour is depicted for a long period of time (days, hours or even months) mood is frequently repeated emotions. Emotions on the other hand last for a shorter period of time. It is unexpected and it fades away. If it does not, it turns to a mood. For example ' peter has been on a foul mood' this is his mood
Sandy who is a steady girl has been flying off the handle for no reason' that's is emotion.