DPE 218
Building on module 118 the module looks at Types of rocks ; how the different types of rocks are formed; soil formation- types of weathering; soil types and their characteristics; soil minerals and their functions; soil organic matter; decomposers; soil structure; soil colour; physical properties of soil ; soil erosion and control; types of erosion; erosion problems; soil management; importance of soil and soil pollution. Importance of water; physical properties of water; functions of water; water retention; availability to plants; water cycle; rainfall; evaporation; ground water; soil water; drainage; water sources; demand for water; water conservation practices water pollution and environmental effects of contaminated water, Soil fertility; plant nutrition, photosynthesis producers; energy flow in an ecosystem; productivity of ecosystems; primary consumers, secondary consumers, and tertiary consumers; food chains and food-webs; carrying capacity; fertilisers; soil fertility management; air, soil and water pollution; environmental pollution and effects on ecosystems.