I'm 3rd year undergraduate student at Brazil and I wish to apply for some USA universities,but I'm scared with GRE. I have good and knowed physicists for rec. letters, experience with research and good grades,what are my chances? I'm thinking in 4 uni : Stony Brook,Chicago,Cornell and Penn. Here in Brazil we have a different type of grades, how the universities will analyse this? Here "GPA" is CR and it goes from 0 to 10,for some long reasons there's not a linear proportion. Just one more : Some tip for GRE? By the way, before applying for PhD I'll do my master degree here. Sorry my poor english, i'm learning.