Essays / I need help with ideas for applying for MSc [2]

Hello,
This is my first time on here, lol i really dont know how this things works.
Okay, i have a litlle challenge... for my 1st degree i majored in Industrial Physics (Electronics & IT Application), right now i'm planning to apply for an M.sc in Petroleum and minning engineering at the university of alberta. Im kinda confused with my essay, Since i practically majored in Electronics can i just switch to Petroleum engineering. I've been in a big fix trying to write my essay also, i really don't know how to relate my previous course to pet eng, since i didnt really study any geophysics related courses.

I just need a few ideas, PLS HELP