Environmental variation -- The mechanism of natural selection -- Adaptation to environment -- Examples from local habitats -- Woodland environments -- The intertidal zone: Rocky shores -- Key idea 2.5 summary -- Key Idea 2.6: The Transfer of Energy -- Concepts to support Key Stages 1 and 2 -- Photosynthesis -- Energy transfer -- Food chains and webs -- The food cycle -- Further concepts to support Key Stage 2 -- Cycles of matter -- The water cycle -- The carbon cycle -- The oxygen cycle -- The nitrogen cycle -- Energy transfer: Micro to macro -- Key idea 2.6 summary -- Biology: Schools National Curriculum Coverage and Progression -- Section Three: Chemistry -- Some key ideas in chemistry -- Key Idea 3.1: The Particulate Nature of Matter -- The kinetic theory -- The states of matter: Solid, liquid and gas -- Changes of state -- The compression of gas -- Elements, compounds and mixtures -- The structure of atoms -- The periodic table -- Atomic bonding -- Key idea 3.1 summary -- Key Idea 3.2: The Classification of Materials -- Introduction -- The origin of materials -- Concepts to support Key Stage 1 -- Natural and manufactured materials -- Concepts to support Key Stage 2 -- Natural materials from the physical environment -- Natural materials from the biological environment -- Manufactured materials -- Types of manufactured materials -- The physical properties of materials -- Concepts to support Key Stage 1 -- Questions about objects and materials -- Concepts to support Key Stage 2 -- Properties and characteristics of materials -- Density -- Hardness -- Strength -- Elasticity -- Stiffness (and flexibility) -- Toughness -- Compressibility -- Thermal and electrical conductivity -- Magnetic properties -- The characteristics of the main groups of materials -- The uses of materials -- Concepts to support Key Stage 1 -- Fitness for purpose