GCSE Exam GCSE Physics
                    
                        4.1.1.1 Energy stores and systems
                    
                                    
                
                    
                        4.1.1.2 Changes in energy
                    
                                    
                
                    
                        4.1.1.3 Energy changes in systems
                    
                                    
                
                    
                        4.1.1.4 Power
                    
                                    
                
                    
                        4.1.2.1 Energy transfers in a system
                    
                                    
                
                    
                        4.1.2.2 Efficiency
                    
                                    
                
                    
                        4.1.3 National and global energy resources
                    
                                    
                