PSB-PN Exam advice, help..PLEASE!

[MissLonnieLee]

Hi everyone :)

I'm taking the PSB PN exam on April 14th (I'm hoping to get into the Career Tech Center At Lackawanna County). I've been studying the Mometrix Exam Secrets for PN. I've also been watching videos on youtube in conjunction with the book for an extra study boost. I could really use some advice. I took the test for the fist time in November but I failed. I didn't really study for it and it was hard! I did really well on everything but the math and science. The math wasn't too bad but I did really really bad on the science. My question is, for those of you who took the test and remember, what categories does the science portion of the test cover? I really don't remember. Is there any organsim classification and astronomy questions on it? I've been studying Chemistry HARD! The peridoic table, electrons and all of that but I'm wondering if I'm studying it too hard. I hope someone can help me. I want more than anything to pass and get in. I'm currently a CNA and would love to be a nurse. Also, if you don't answer a question, do they mark it wrong? I'm thinking about just skipping the question if i'm stuck but I want to make sure they don't mark it wrong. Any advice would be a huge help. Thank you!!