GCSE OCR 21st century extension science: The workbook

This book is packed with practice questions for GCSE Science students. It's exactly what you need if you've already got CGP's Core and Additional Science Workbooks and you're about to do OCR 21st Century Separate Sciences. The topics match those in CGP's Extension Science Revision Guide (9781847623294) and it contains a range of questions on every topic to test your knowledge ready for your exams. The answers come in a separate book (9781847623379).