If you look at image 5-18 in the PHAK Chapter 5 about leading edge lift devices you see this:
However the paragraph preceding it states
High-lift devices also can be applied to the leading edge of the airfoil. The most common types are fixed slots, movable slats, leading edge flaps, and cuffs.
So is this a typo? Should the image say 'movable slat' instead of 'movable slot'?
This leads into my main question which is, what are the differences between a slat and a slot? If I were to get asked this by an examiner what would a good response be?