Graduate School Financial Aid
Most Physics/Mathematics/Engineering/Biology Departments give
full support to 100% of their students (I can't think of any
exceptions). All you need to do is fill out the Financial Report (or
whatever it is called), which is included with your application,
which basically means putting "0"s in most fields.
If you apply to
Humanities or Social Sciences it is much harder but still possible
to get the financial aid, usually in terms of Teaching
Assistantship. Check the department web page or ask the department
secretary for the details.