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.
Text and color photos and diagrams present an overview of rivers, covering their sources, their flow, floods, waterfalls, river wildlife, and other related topics.
Provides a general introduction to birds, and looks at the variety of physical characteristics and abilities within the bird world, including beaks, feet, feathers, flying skills, and nesting and migrating behaviors.
Describes some of the ways in which humans communicate and presents activities which demonstrate the workings of such mechanisms as a printing press, telegraph, and microphone.
Photographs, illustrations, and simple text describes the concepts of light and dark, how light can travel at different speeds, how a lens works, and how special types of light can be used.
Looks at where wood comes from, and explains how it is processed for use as furniture, fuel, paper, and other products. Includes a glossary and activity.
Describes invertebrate animals which can be found in gardens, including insects, spiders, snails, and worms. Includes review questions and related projects.
