"Course notes" would be a generic phrase used by the bookshop to describe stuff you buy - whether it be prac/lab manuals, pre-printed Calc 1 slides or readings in the case of Arts subjects.
The lecturers for bio and chem will often add information to the slides last minute (maybe something relevant to the news or whatever), so they don't compile slides for the whole course at the start. Plus considering you will have upwards of 4 different lecturers during the semester it would be a nightmare for them to organise (and pay for) pre-bound slides for 2000 students.
For bio you will buy a lab manual and for chem you'll get a lab manual and tutorial workbook.
Yep, I think we're mostly on the same page (no pun intended). I assumed that the material that they teach from, in this case the lecture slides, pre-reading material and other bits and pieces would be compiled into a bounded book that we then buy. The annotations and other important things that get added by each lecturer we would then add ourselves, so it would make our lives a lot easier not having to print bit by bit each week. So we'd just bring it along to each lecture and annotate/add notes as each lecture progresses.
I do think that all the lecturers go off the same slides? I've already printed my slides for Calc 1, and flicking through some other subject's course notes in the bookstore, some of them had many pages of just slides. They do tell us that if you can't make it to one lecture, you can attend the later one and the presented content is the same, it's just that you may be slightly behind/ahead than the substitute you attend.