Introduces patterns and cycles of day and night, and describes the importance of daytime and nighttime, the length of a day, and more; and includes explanatory diagrams, glossary, and index.
Presents a children's study of animal hibernation and discusses where different animals hibernate and for how long, as well as the various animals who sleep through the winter such as bears, marmots, snakes, woodchucks, and others.
Explains the water cycle, how water evaporates from the sea, forms clouds, falls as rain or snow on the land, and flows into rivers and streams, which flow back to the sea.