This book briefly describes the value of a tree.

Explains the theory of continental drift, describes how this movement causes earthquakes and volcanoes, and discusses famous eruptions and earthquakes of the past. --

"Enter the dark Antarctic winter, where a pair of emperor penguins share the task of keeping their young one alive--and discover how fighting climate change is key to their survival." --Book jacket.

Provides an overview of the history, geography, and people of the Silk Road region and presents twenty projects to help students learn more about the topic.

"This book takes a tour of the western region of the United States"--

Photographs and text explain the causes and effects of volcanoes and earthquakes and examine specific occurrences throughout history.

"Step into the world of ancient Rome and meet its emperors, gods, soldiers, and gladiators. Who were Rome's most famous emperors? What was everyday life like for a soldier in the Roman army? How did the citizens of ancient Rome live? Did gladiators really fight to the death in the mighty Colosseum? Find out the answers to all these questions, and many more, in Eyewitness Ancient Rome. Photographs of real artefacts and detailed illustrations will help...

Santa Claus frolicking with penguins and polar bears--do you know what's wrong with this picture? Actually, no penguin has ever lived at the North Pole, nor any polar bear at the South Pole. Using a wide range of disciplines from physics to geography to biology, award-winning science writer Elaine Scott explores some of the unique properties shared by the two ends of the Earth's axis, and other ways in which they are poles apart. Find out what makes...

Photographs and text depict the many different kinds of reptiles, their similarities and differences, habitats, and behavior.