Rocks are made of minerals and, as minerals are natural crystals, the geological world is mostly a crystalline world. This course, Minerals and the crystalline state introduce the study of minerals and crystal structures, using online text and interactive activities, including questions and answers, video clips, slide casts and a Digital Kit.

Both vitamins and minerals are essential in the diet in small quantities. Learn about the two main vitamin groups and the major mineral elements. This course, Nutrition: vitamins and minerals, looks at the two main groups of vitamins: the fat-soluble vitamins, A, D, E and K; and the water-soluble vitamins, the B group and vitamin C. It also examines the major mineral elements, and the importance of fluid balance in the body.