Our restless earth

Describes why volcanoes and earthquakes occur, the chaos they cause, how they help to form mountains, valleys, and islands, and ways in which they are useful to people.

Describes the water cycle, erosion, environment, and ecosystems of rivers.

Discusses the nature, formation, environments, and ecosystems of mountains.

Discusses the characteristics of different types of coastlines and islands and describes how they are shaped and changed by water, wind, and volcanic eruptions.