Ok, I am not the best man at math but would like to understand the principles behind these sciences. However these terms are really messing me up. Please someone out there help. 1.) Is there a difference between Quantum theory and Quantum Physics 2.) What is the difference between Quantum Field Theory and Unified Field Theory 3.) How do Unified Field Theory and String Theory fit together. I will love whoever responds to this with great answers. Thanks for your time and help. My mind is jumbled and I would love to get this slipknot lose.