Biology comes easily to me, because I'm good at thinking in terms of processes and a lot of it is processes. Physics, calculus.... Not so much. I scraped through physics, and dropped calculus altogether. Chemistry seems to be hit or miss. I did really well at Gen Chem I and II, but barely escaped O Chem I. I'm in O Chem II now, and trying really hard to stay on top of the mechanisms and the practice problems, and I think I'm doing well but I won't know for sure until the first test on Feb 11!
It's similar with me. I'm excellent biology student, but I do not do well at the other sciences and math. I think it has to do with having an excellent teacher in high school and that the subject genuinely interests me. I've taken everything from Natural History to Evolution to Animal Behavior to Cell and Molecular and all these different courses are so awesome.
As for math, I had difficulty memorizing equations and knowing when to apply them to the question... so I usually struggle with tests. Also, I had a HORRIBLE pre-cal prof in university (see the rant here thread), so I gave that up for statistics. I had a better prof for that. The course seems more relevant in the real word than calculus, and the problems are less complicated. Went from flunking pre-cal to getting an 86 in stats.
Chemistry and physics... I never grasped it for some reason. We started learning chemistry in grade 9. In an old blog post, I said that I got a 74 on the test for that unit. In grade 10, I got into the pre-IB science course (think quantum physics and aufbau order) and it just blew my mind. I got a 71 in that class and went on to take academic chemistry (physics wouldn't fit my schedule... I tried!). Grade 11, I had a horrible professor and grade 12, an extremely large, loud class... then I had two horrible profs for gen chem I, gen chem II and organic I with no access to a tutor. I find the material boring and the professors are overly difficult when it comes to tests and things. Right now, I'm trying to be more open minded and I'm seeking out the prof and my peers for help.
Physics... it's similar to math... pick an equation to solve a problem... I had an amazing professor. Won the physics award for my class at the Student Undergraduate Research Forum... did iffy in the course because I spent all semester sick. I wish I could take the upper level physics... but I need calculus to do that. I really enjoyed the course... and had a very dedicated and fun professor but with two assignments due each week, I fell behind when I started getting sick.
I kind of rambled on there... lol.
To summarize... biology is interesting to me, so I tend to grasp it better. Chemistry bores me and I've always had trouble grasping the concepts. Loved physics because the problems had relevance and the class was fun. Have difficulty grasping calculus because I never know what method to use when solving a certain problem.