The Inside Guide: Earth''s Four Spheres

The biosphere is the part of Earth where life exists or can exist. It includes all living things on Earth, as well as the nonliving systems that help them survive. Readers of this stimulating volume will learn how people affect the biosphere and how life and energy are maintained in the biosphere. Key elementary science curricula, including concepts such as food chains and life cycles, are reinforced through eye-catching graphic elements and age-appropriate text.