Urgent help needed for Core Science GCSE Ideas in context Watch
Secondly, here are some links I found that might help you out.
The first one is for the gcse bitesize revision site. For the second one, click on the one you're doing then go to key documents, from there you can download the specification as a PDF, which will tell you everything you need to know. There's also past papers and mark schemes available there.
Hope this helps