Changes

*[[https://keystagewiki.com/index.php?title=GCSE_Chemistry_Exam_Papers&action=edit&section=17 GCSE Science OCR Twenty First Century Combined Science P1F Specimen]Question Paper and Mark Scheme]*[[https://www.ocr.org.uk/Images/234668-unit-j260-08-combined-science-higher-tier-paper-4-sample-assessment-material.pdf GCSE Science OCR Twenty First Century Combined Science P1H Specimen]Question Paper and Mark Scheme]