Build your child's reading confidence at home with books at the right level Join the experts on their field trip and discover how the rocks, fossils and soils are a vital part of our planet. Topaz/Band 13 books offer longer and more demanding reads for children to investigate and evaluate. Text type - An information book. The book is organised into short chapters to help children practise the skills of locating and identifying important information. The glossary and index on pages 30 and 31 can be used to develop children's information retrieval skills further. Curriculum links - Science - Rocks; Geography - Natural resources.