I remember that one, I did horribly in it which was a bit of a shock. Write up notes summerising everything that you've done so far and lern the points including the scientific laguage. The part where I went wrong is in the theory componant. Always take time to read the question Carefully consider your answer before you put it down, I didn't and I didn't answer the question properly resulting in one of the classes lowest marks. Just try to stay calm and pay attention is all that I'm trying to say.