This document contains the mark scheme for the May/June 2013 International General Certificate of Secondary Education (IGCSE) Physics exam. It lists the correct answers to the 40 multiple choice questions on the exam paper and provides guidance to examiners on how to apply the marking criteria. The mark scheme should be used along with the exam paper and examiner's report to ensure consistent evaluation of students' responses. Cambridge International Examinations publishes mark schemes for most exams to support accurate assessment.