Spanning multiple topics, these Science Readers aim to develop content-area literacy in the sciences. An engaging layout with bright colors, large graphics, and informational sidebars invites readers to explore the text, which builds in concepts. The Four Spheres of Earth presents the makeup of the geosphere, hydrosphere, atmosphere, and biosphere and how they connect to make the planet a unique place for life. The book also relates the interdependence of ecosystems. Each volume includes a glossary and extends the discussion with concluding experiments and thought-provoking questions. Solid science basics for individual or classroom use.