Explore estimation theory and geophysical predictions by learning about seismologists, volcanologists, and meteorologists! This exciting title showcases the importance of predicting and preparing for disasters in order to save lives. Volcanologists test gases on a volcano to predict eruptions! Meteorologists use Doppler radars to predict tornadoes! These data collectors use estimation in order to do this. Readers can use sample problems to practice estimation with the help of easy-to-read text, clear mathematical charts and diagrams, and an accessible glossary. This title encourages children to improve their problem solving and STEM skills.