How well do you know Myra Levine's conservation theory? Play this informative quiz to find out. Myra Levine's theory is a highly popular nursing model that keeps patient's health at the center. Do you know the four principles of Levin's theory? What does conservation of energy mean? What do the critics say about the theory? Take this quiz and get answers to all these and much more. If you like this quiz, do share it with your friends.