-describe the conversion of iron into steel using basic oxides and oxygen -name the uses of aluminium: in the manufacture of aircraft because of its strength and low density; in food containers because of its resistance to corrosion -describe the idea of changing the properties of iron by the controlled use of additives to form steel alloys -name the uses of mild steel (car bodies and machinery) and stainless steel (chemical plant and cutlery) -name the uses of copper related to its properties; electrical wiring and in cooking utensils -describe the reasons for the use of copper and (steel-cored) aluminium in cables, and why plastics and ceramics are used as insulators [Metals: uses]