Earth's spheres

Describes the physical characteristics, formation, and processes that shape Earth's mantle's uppermost layer, the lithosphere.

Photographs and text introduce students to the structure and function of the earth's hydrosphere, describing what it does, how it impacts the planet, and what role it plays in the universe.

Presents a brief study of the Earth's outer atmosphere and its importance in protecting and sustaining life on Earth.

Describes the characteristics and formation of Earth's core and mantle, explains how scientists learn about them, and examines the ways they affect Earth's other spheres.

Presents a brief study of the Earth's biosphere, discussing where life comes from and how life has changed over the centuries.