@Srfp_23 13 answers, 12 votes
I have taken both courses in the past. AP Physics was harder than AP Bio; that is a common opinion among most students. It all comes down to how these courses are taught.
1. AP Physics: This class is formula oriented, which means you are dealing with a lot of math. There's also a logical and visual aspect woven into the course, which will be noticed by doing labs. I think overall, how you learn this subject can either make your understanding of it harder or easier. My teacher didn't start reviewing until a week before the AP exam, and we never did AP style questions. Regardless, if you want to take this course and want to make sure you are doing your best, watch videos on College Board (teacher needs to unlock them), look at old AP exams, especially the frqs, and look at websites catered to AP courses, such as Khan Academy.
2. AP Bio: The labs in this course are really fun, and these experiments are sometimes asked in question form (maybe even on an AP exam). This course takes standard bio into a different level. You will start off with the basics of each topic and dive further into it. I really enjoyed learning all about DNA and the cell cycle (that along with ecology are possibly the easiest units). College Board and Khan Academy are great sources and so is Bozeman Science.
Typically, high school students start taking AP sciences during junior year because they will take bio and chem for the former half of the four years. However, starting these courses depends on how advanced you are in science. If you are a math person, I would suggest giving AP chem a try instead of AP physics. It's a hard course, but I prefer it over AP physics because the math isn't that complex and some things you will learn are more based on logic.
