Explore the water, land, and air around us with this entertaining and informative look at our magnificent planet—and learn how your experiments, activities, a

This lively collection of fascinating facts and fables, colorful cartoons, and dynamic illustrations explains how everything on Earth is connected. Since its or

A ball drops to the ground. Leaves fall from a tree. Gravity is at work all around you. But what exactly is gravity? And how does it affect different objects? R

Soil contamination . . . public lands . . . surface and groundwater pollution . . . coastal erosion . . . global warming. Have we reached the limits of this pla

Did you know that there the Earth is home to so many kinds of landforms? This exciting book will take you to the deepest valleys and the highest mountains in ju