For me, it felt like 50% was calculation. but i dont know. there were topic in physics such as waves, sound, pressure and things in chem such as electrochem, and redox. it wasn't as bad i thought it would be so as long as you know your basic material for phys science, i think youll be fine. its bio that id work on cause you never know when there a discrete that you couldve gotten right had you studied an extra bit on a certain topic.