Tell me why, tell me how

An introduction to the science of wind. Describes different kinds of winds and their speeds. Discusses when wind can be destructive.

Traces the twenty-nine day orbit of the moon around Earth and the different phases of its appearance because of its position from the sun.

Presents age-appropriate scientific explanations to simple questions about rain, accompanied by a hands-on activity that illustrates concepts within the text. Includes diagrams, charts, "Now I Know" quizzes, and illustrations.

Explains the science behind volcanic eruptions. Includes color photos, an activity, and a glossary.

Explains the four seasons and why they occur. Describes the Earth's revolutions around the sun and the tilt of the Earth's axis.

Explains how leaves change their colors in autumn and then separate from the tree as the tree prepares for winter. Features color photographs, answers to common questions, and an activity.

Explains why and how different kinds of bears hibernate. Includes many color photos and actions to help save bears.

Provides a basic examination of the phenomena and scientific principles behind plant growth. Includes color photographs.

Explains how fish get oxygen from water using their gills.

Examines how spiders around the world construct different kinds of webs to catch food, elude predators, and protect their eggs. Features full-color photographs and a glossary.