Progress IGCSE Energy Complete & Continue Next Lesson Learn More 1. Energy stores 2. Pathways and flow diagrams 3. Work done 4. Gravitational potential and kinetic energy 5. Efficiency 6. Fossil Fuels and alternatives 7. Water and energy 8. Solar energy 9. Conduction and convection 10. Radiation IGCSE Energy Complete & Continue Next Lesson Learn More 6. Fossil Fuels and alternatives