WordNet sense 1 (appearing as such but not necessarily so):

ostensible, seeming

WordNet sense 2 (being or affecting or concerned with a surface; not deep or penetrating emotionally or intellectually):

superficial

WordNet sense 3 (clearly revealed to the mind or the senses or judgment):

evident, manifest, patent, plain, unmistakable, patent

WordNet sense 4 (easily perceived by the senses or grasped by the mind):

obvious