Scientia is a singular feminine noun in nominative or accusative case. It means "knowledge" or "science" in a broad sense. For example:
>* Scientia est potentia. (Knowledge is power.)
>* Alma mater nostra scientiam nobis tradidit. (Our alma mater imparted knowledge to us.)
Scientifica is the feminine form of the adjective "scientificus" (masculine) and means "scientific" or "pertaining to science." It is used to describe something related to the field of science or scientific research. For example:
>* Methodus scientifica est modus ad cognitionem acquirendam. (The scientific method is a way to gain knowledge.)
>* Revista scientifica dedit nobis informationes de novis inventis. (The scientific journal provided us with information about the new discoveries.)
In summary, "scientia" is a feminine noun referring to knowledge or science, while "scientifica" is the feminine form of the adjective "scientificus" and means "scientific."