Title: The How and Why Wonder Book of
Subtitle: AIR and WATER
Description: **The How and Why Wonder Book of AIR and WATER** explains the scientific principles of gases and liquids by displaying simple experiments with air and water.

**Produced and approved by noted authorities, The How and Why Wonder books answer the questions most often asked about science, nature and history.** They are presented in a clear, readable style, and contain many colorful and instructive illustrations. Readers will want to explore each of these fascinating subjects and **collect these volumes as an authentic, ready-reference, basic library.**
Subjects: How and Why, Grosset & Dunlap, Children's, Juvenile, Books, Non-fiction, Literature, Experiments, Air, Water, Gases, Liquids, Juvenile literature
Time periods: 1969