Electrical principles. -- Electrial circuits. -- Energy consumption. -- The distribution of matter in space. -- Objects in space. -- Optical and radio telescopes. -- Physical and chemical properties of materials. -- Chemical reactions. -- Using the periodic table. -- Naming chemical compounds. -- Writing chemical equations. -- Variation. -- Reproduction and patterns of inheritance. -- Genes and cell division. -- Organisms and matter in their environment. -- Biological and chemical monitoring/acids and bases. -- Transfer of materials through the air, ground and water/biological impacts of hazardous chemicals.