I normally get my predictions right, I think that the six marker will be about the advantages and disadvantages of quarrying limestone. there could also be a 4 mark question about electrolysis and fractional distillation. you could also be asked about the environmental problems, especially sulphur dioxide and global dimming. You could also be asked for the test and result for unsaturated fats, which is that you add bromine water (1) and an unsaturated fat will decolourise (1) another extremely COMMON question will be on emulsions. Wegner's theory of tectonic plates could also come up. finally, you could be asked questions on the Miller-Urey experiment. the rest of the marks will come from interpreting graphs and investigations.
...for the 2nd time this year