Raintree perspectives

Provides information about the properties of oil, explains where oil comes from, and looks at different types of oils and their uses. Includes a glossary.

Explores the various products and uses of wood including paper, fuel, furniture, buildings, and boats and explains the importance of wood in the environment.

Describes pathogenic microorganisms such as bugs, germs, bacteria, and viruses that cause illness in our bodies. Makes practical suggestions for coping with these tiny organisms.

Introduces microbes that live in soil and helps plants grow. Explains the role of microbes such as grubs in the cycle of life.

Introduces microbes that help people stay healthy. Describes microbes such as yeast and mold that are used in baking and making medicine.

Introduction to wheels, one of the simple machines.

Examines the various species of snakes, their habitats, movement and senses, how they hunt, and their life cycles.

Presents an introduction to the world of ancient Rome, providing information about the people, cities, food and drink, art, technology, religion, government, and other aspects of the civilization.