Life and living and processing. Photosynthesis -- Nutrients in food and nutrition -- Food processing -- Ecosystems and food webs -- Matter and materials and processing. Solids, liquids, gases -- Mixtures -- Solutions as special mixtures and dissolving -- Mixtures and water resources -- Processes to purify water -- Energy and change and systems and control. Electric circuits -- Electrical conductors and insulators -- Systems to solve problems -- Mains electricity -- Planet earth and beyond and systems and control. The solar system -- Movements of the earth, planets and the moon -- Systems for looking into space -- Systems to explore the moon and mars