Hot ash explodes into the sky. Molten lava pours down the sides of a once-quiet mountaintop. A volcano is erupting! Volcanologists monitor and study volcanoes to find clues about when they will erupt. Put science skills to work to help a city prepare for the next volcanic blast. Readers use charts, tables, and scientific diagrams to solve the same type of science problems experts face every day. Grades 3 and up. Save $1 per book when ordering 10 or more copies.