Unlike other subjects where the exact questions popped up, for sciences you will expect to see similar topics from the predicted paper. I suggest doing the paper the night before and correcting it to make sure to get full marks.
These were exactly what I needed when I was all out of ideas. The depth and range of material provided was enough on top of what I had already produced to get our student through to the end.
It was pretty accurate, and helped me know I needed to target photosynthesis and some other key topics. Compared with the actual paper I did today, it was similar and definitely a good preparation material!