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Questions and answers and activities explore the definition, cause, effects, and uses of sound.

Discusses art history, various styles of art, the motives for making art, and how art relates to people and nature.

Uses brief text, illustrations, puzzles, quizzes, and other activities to introduce some of the different kinds of structures in which people live, as well as their design, construction, and furnishings.

Questions and answers and activities explore the definition, causes, effects, and uses of energy.

Uses a question-and-answer format as well as quizzes and other activities to describe machines, present their history, explain how they operate, and discuss how they change the world.

Uses brief text, illustrations, quizzes, and games to explain the physical characteristics of earth, how life began on earth, and how people have interacted with the planet through history.