Final answer:
A judge who observes a living and changing Constitution is known as a liberal constructionist. Liberal constructionists believe that the Constitution should be interpreted in light of the changing times and society, allowing for flexibility and adaptation.
Step-by-step explanation:
A judge who observes a living and changing Constitution is known as a liberal constructionist. Liberal constructionists believe that the Constitution should be interpreted in light of the changing times and society, allowing for flexibility and adaptation. They are often associated with the philosophy of judicial activism and view the Constitution as a 'living document'.