LEVEL 3 – READING ALONE WITH SOME HELP (orange) Sentences will become more varied and longer and some more formal vocabulary will be introduced. Includes glossary and index. Starting with the essential question, "What is a volcano?" this book covers all aspects of volcanology, including the anatomy of an eruption, contemporary and ancient volcanoes, underwater volcanoes, and the scientists who study them. Amazing photographs draw readers in, and throughout the book "Red-hot fact!" boxes dish out fascinating information to keep it interesting. ey vocabulary within the text and a glossary and index at the back help kids strengthen their new reading skills.