Preparing for TeasV! please help!

I am new to this website, but have been reading threads for a few weeks now and figured to just sign up and ask myself! I am going to take TeasV soon and am PETRIFIED!! I hear mixed reviews--some say it's not too bad, some say it's horrendous. I have the ATI test manuel, and finished with the math portion--now on science. That is my biggest fear! What does TeasV have as far as science? Will studying the manuel prepare me for atleast most of the science? If not--what can I get to prepare me?
Please any intake and suggestions will be GREATLY appreciated.