The Ladder of Abstraction
It's also important to know what type of chunk you should present. Imagine one chunk as a ladder, with very general (or abstract) information at the top and very specific information at the bottom:
Fruit
Apple
Green or Red Apple
Macintosh Apple
Genus Malus
This is also known as the ladder of abstraction. Depending on the situation, you might want to chunk down information (get more specific) or chunk up information (create a broader overview).