A bachelor's degree is required for ALL master's, C.A.S., Ed.S., and doctoral programs.
Official transcript of all previous college or university work
TOEFL iBT - 80, IELTS - 6.5
GPA
On a 4.0 scale, grades below 3.0 are cause for concern. What you took (how challenging) is also important, as is whether your grades showed an upward or downward trend through your undergraduate career. Good grades in mathematics and physics are clear assets. If it didn't happen during your undergraduate career, consider taking a summer or evening course on a tough subject to add to your portfolio.
GRE

Many applicants profess to do poorly on standardized tests under high pressure. What should the committee do, however, when some applicants have high scores and some have low? Consider retaking the GRE if you fared poorly, and pay close attention to the grading procedures. Members of the admissions committee share your distaste for working on a show of skills versus the skills themselves, but these standardized test scores are one way to level the playing field among applicants from schools that committee members may know poorly or not at all. And if you truly master the skills, you need pay less attention to the grading rules.

Letters

What constitutes a good recommendation letter? A letter that will be an asset shows through providing specifics of your interactions and performance that the writer knows you very well. A strong letter can counterbalance weakness elsewhere, especially if the writer knows you in a research setting (e.g., during an internship or work-study opportunity) or rigorous classroom laboratory setting. Things we look for include evidence of a strong work ethic, initiative and creativity.
Personal essay

What should you put in your essay? Again try to consider the perspective of the admissions committee. They are trying to use this letter to decipher whether you have realistic expectations of graduate school and know why you are choosing to apply here. Educate yourself on the institution at least through its web pages and by reading a few publications of its faculty. Don't focus on a specialty for which the program has no potential advisor. Dramatic writing has its place, but not in your essay. Saving the oceans and feeding the world from the oceans are not realistic graduate goals.