Recently I've became quite interested in chemistry, I want to start learning about it and I thought I may follow the guides on bbc bitesize for n4/5 then past papers and maybe some books too, However I didn't choose chemistry as a subject. If i learn enough at home do scottish highschools still let you take the exam even though ive not chosen the subject, Also I've not done any nat 4 mateiral of it at all and I won't be doing the prelim for it? If no can i do it in 5th/6th year. thanks