A bachelors degree in geology biology chemistry physics or other science is required Applicants must have outstanding records in the relevant basic sciences and mathematics Qualified students may proceed directly toward the PhD although most obtain the MS degree in the process Exams GRE Types GRE Optional Subject test scores are optional and may be in any appropriate subject Letters of Recommendation 3 The general requirement for admission for a US student is a bachelors degree from a regionally accredited institution comparable in standard and content to a bachelors degree from the University of California Graduate admission through the regular process requires an overall scholastic average including any postbaccalaureate study of B 3.0 on a 4.0 scale or better or its equivalent if the letter grade system is not used. Your IELTS Academic overall band score should be at least 7.0. 7.0 is the minimum required. Your TOEFL score on the paper and pencil test must be at least 560 or at least 87 on the internet-based test. For the internet based TOEFL TOEFL iBT the following are the expected scores for each section Writing - 25 Speaking - 24 Reading - 21 Listening - 17