Emotions have physiological correlates, are expressed physically (gestures, facial expressions, etc.), result from specific events, often leading to more actions.
Moods last longer than emotions, perhaps a day or two. May not be expressed physically, may not come from an event.
Attitudes have more cognitive, conscious brain component.
LeDoux (2000) has sown that certain emotions activate certain parts of the brain.
The 7 emotions are shown by facial expressions and are universal.
If using pictures to communicate use one of the seven basic emotions to communicate more clearly.
People read emotions fairly well from photos.
Decide which emotions drive your target audience.