A simple introduction to the composition and functions of blood.

Explains how and why a thunderstorm occurs and gives safety steps to follow when lightning is flashing.

Read and find out about one of nature's most mysterious forces-the earthquake. Some earthquakes are so small that you don't even feel them, while others can make even big buildings shake! Learn why earthquakes happen, where they are most likely to occur, and what to do if one happens near you.

Discusses the importance of trees as sources of food, oxygen, and other essential things.

Explains how leaves change their colors in autumn and then separate from the tree as the tree prepares for winter.

Provides basic facts about the behavior of bats and describes how they benefit the environment.

Explores the mysteries of bird migration, including theories on how birds find their way and how scientists learn about migration.

"How does a magnet work? Why does a magnet pick up a paper clip but not a leaf or a penny? How can the whole world be a magnet? Read and find out more about how magnets work! Franklyn M. Branley's classic text is seamlessly updated by NCTE Orbis Pictus Award Honoree Carolyn Cinami DeCristofano in this reissue. Now rebranded with a new cover look, this book features rich vocabulary, fascinating sidebars and diagrams by artist True Kelley, and a find-out-more...

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

Describes the physical characteristics, behavior, and life cycle of crickets while giving particular emphasis to how they chirp.