We already said that the knowledge is under cognitive domain of blooms  taxonomy of learning skills

Now we can look into the taxonomy in deatail

BLOOM’S TAXONOMY

Bloom's taxonomy is a classification of learning objectives within education proposed in 1956 by a committee of educators chaired by Benjamin Bloom, who also edited the first volume of the standard text, Taxonomy of educational objectives: the classification of educational goals (1956). Although named after Bloom, the publication followed a series of conferences from 1949 to 1953, which were designed to improve communication between educators on the design of curricula and examinations. At this meeting, interest was expressed in a theoretical framework which could be used to facilitate communication among examiners. This group felt that such a framework could do much to promote the exchange of test materials and ideas about testing. In addition, it could be helpful in stimulating research on examining and on the relations between examining and education. After considerable discussion, there was agreement that such a theoretical framework might best be obtained through a system of classifying the goals of the educational process, since educational objectives provide the basis for building curricula and tests and represent the starting point for much of our educational research."

It refers to a classification of the different objectives that educators set for students (learning objectives). Bloom's taxonomy divides educational objectives into three "domains": Cognitive, Affecive, and Phsycomotor (sometimes loosely described asknowing/head, feeling/heart and doing/hands respectively). Within the domains, learning at the higher levels is dependent on having attained prerequisite knowledge and skills at lower levels. A goal of Bloom's taxonomy is to motivate educators to focus on all three domains, creating a more holistic form of education.

A revised version of the taxonomy was created in 2000.