Interactions and interdependencies. -- Nutrient cycles, energy flows and changes in ecosystems. -- Environmental impacts of human activities. -- The particle model of matter, temperature, heat and change of state. -- Heat transfer. -- Understanding heat and temperature in nature and technology. -- Life processes and structure of plants. -- Plant propagation and reproduction. -- Plant needs and growing conditions. -- Role of plants and controlling plant growth. -- Review of plant management. -- Forces on and within structures. -- Structural forms. -- Materials used in structures. -- Rocks, weathering and erosion - The rock cycles. -- Plate tectonics and related events. -- Fossils.