Physics/Chemistry Requirements Below are the most common courses that CSD students take to complete their physics and chemistry requirements. As noted below, PHYS 121 is one of the most popular with CSD majors as it has aspects that can be crossed over into Audiology. These courses are the ones that are available for all majors to take. Please note that most Graduate Schools do not accept ISCI courses due to ASHA Guidelines. A course title with PHYS or CHEM is what is needed for requirements. PHYS 121. The Physical Nature of Light and Sound (includes lab) Most CSD majors take this course Has aspects of sound that can assist with knowledge for Audiology PHYS 140. College Physics I (PHYS 140L required lab corequisite)* PHYS 215. Energy and the Environment* Prerequisites: One college course in science and one in mathematics. PHYS 240. University Physics I* ...