OCR 21st Century Science - COURSEWORK

sooo i've just started coursework for biology, chemistry and physics and I was wondering if anyone elsee is in the same boat and can help me out a bit?
doing trip sci, and for chem we're investigating energy/temperature change in Zn + CuSO4, i'm looking at the factor mass of zinc, for bio we're investigating a factor that affects simple animal behaviour (simple animal is woodlice) andd for physics it's a factor that affects light intensityy, im looking at how distance from a source affects light intensity.
i dont know if anyone elsee has posted a thread about this but yeahh, we started kind of late and im a bit confused about biology mainly..