All applicants must meet Idaho State University Graduate School admission requirements for doctoral programs. Additionally, applicants must have attained a master's degree in engineering, physics, chemistry, geosciences, mathematics, or a closely related field. Applicants must submit a one-page (only) statement of research interests, a one-page (only) statement of career interests, a resume, and at least 2 letters of reference along with their applications. In some special cases, a student with exceptional undergraduate academic record and aptitude for research, but without an M.S. degree, may be directly admitted to the Ph.D. program with the approval of the Ph.D. program committee. Toefl Internet-based test (iBT): a total score of 80 with a score of at least 20 on each Section , Computer-based test: a total score of 213 with a score of at least 21 on Section 1 (Listening Comprehension) on the computer test, Toefl Paper-based test: a total score of 550 with a score of at least 55 on Section l (Listening Comprehension) on the paper test. Satisfactory IELTS performance for Classified admission includes scoring 6.5 or higher on the total band score.