GCSE higher combined science aqa

How long does it take to achieve a 6-6 GCSEs higher combined science and how long does it take to revise from scratch basically with very little knowledge of the course. I have a good memory but I make a lot of silly mistakes I can revise for 6 hrs a day effectively with breaks. What is the difference between combined science foundation and combined science higher

Hello ^^
I'm a Year 9 student right now, and we're doing combined science for GCSE (for now). We haven't divided in sets yet, but we will after Year 10 Christmas.
My current target grade is a 6-6, so in my perspective, basically to achieve a 6-6, you need to have a good grasp on the concept, and are able to develop your points clearly with the necessary key words/ phrases. Although I would say having good memory would help, the most important thing is to actually fully understand the concept, which I am working on right now.

I hope this actually helps :')

combined science higher go into more detail and more specific than foundation level. I have looked at past papers and they seem quite easy they just go into more detail. If I am wrong then please correct me. How long did you take you to learn the content?