Re: A Level Sciences
As a couple of others have said, it depends on what you want to do at university. If you want to do a science-based course, Chemistry will unequivocally be useful.
I'm currently in the my first year of sixth form, doing Maths, Chemistry, Physics and Geography, and I would say that unless you uphold a strong work ethic then Chemistry is arguably the most difficult (along with Maths). It's quite a step up from GCSEs; initially you do the 'basics' (i.e. interaction between molecules, bonding, etc.) before moving onto organic chemistry (which is a BITCH) and reaction rates/equilibrium, etc.
Organic chemistry is horrible, as there is an enormous amount to learn, but the other topics aren't too bad. I wouldn't recommend doing it unless you get higher than an A at GCSE though, as you'll probably struggle.
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