Discusses the basic scientific principle of gravity, including key concepts and how it is present in daily life.

Presents information on the scientific principles of solids, discussing the properties of solids and the different types, including metal, plastic, and crystals.

Presents basic information on the scientific principles of motion, discussing force, inertia, and friction, and offering examples from the physical world to explain these properties.

A simple introduction to what gases are, how they behave when heated or under pressure, and some other properties of gases.

Each book in this series provides readers with a deeper understanding of the world's biological communities, with each title focusing on a particular biome, biome type, groups of biomes or system. The books contain an introduction to the Earth's principal biomes with enough depth for project work. The atlas approach gives the series a relevance to the geography curriculum.

Text, photographs, and transparent pages reveal how parts of the human body work.

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