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Discusses why earthquakes happen, what their sometimes devastating effects can be, where the danger zones are, and what measures people can take to safeguard themselves.

Describes the characteristics of snow, its usefulness to plants and animals, and the hazards it can cause.

Describes the various properties of air and shows how to prove that air takes up space and that there is air dissolved in water.

Explains how volcanoes are formed and how they affect the earth when they erupt.

Explains the phases of the moon--the changes that seem to happen to it as it goes around Earth.

Explains basic facts about the Big Dipper, including which stars make up the constellation, how its position changes in the sky, and how it points to the North Star.

Explains how the water cycle leads to different types of weather patterns.

Discusses some of the ideas and misconceptions about life in outer space and speculates on the existence of such life in light of recent space explorations.

Introduces the solar system and its nine planets. Includes directions for making two models, one showing relative sizes of the planets and the other their relative distances from the sun.

A simple explanation of how the rotation of the earth causes night and day.

Describes various scientific theories which explore the extinction of the dinosaurs.