im trying to learn all this stuff about metal oxides and displacement reactions like I CAN'T. so much content. also, do you think we'll need to know in-depth diagrams about skeletal and respiratory and circulatory systems and all that??
Try not to stress out so much about cramming all this scientific knowledge. The stuff on the scientific reasoning will probably only be very general things that require you to have some prior knowledge and be able to interpret the information given to you.
The scientific essays will give you a sufficient amount of information so that you are able to write it.
As for the body systems, you should try to learn the basics: learn what organs are in that system and what their functions are.
Even if you don't provide an incredibly detailed diagram of the body system, they probably won't mark you down on it.
I know that this kind of thing stresses us all out, but guys: try to relax for the remaining days.