Sally M Walker

Traces the history of the Mason-Dixon Line as reflected by family feuds, exploration, scientific advancement and the cultural conflicts between America's northern and southern states.

This book reports on the work of forensic scientists who are excavating grave sites in James Fort, in Jamestown, Virginia, to understand the people who lived in the Chesapeake Bay area in the 1600s and 1700s.

"Sibert Award winner Sally M. Walker crafts an engaging, middle-grade nonfiction narrative of the American Indian soldiers who bravely fought in the Civil War"--

Readers learn about minerals, their properties, and their uses.

Provides a history of Saint John's Freehold and offers details about the work of scientists and historians who have been excavating and restoring the property.

Electricity powers lights, computers, and television sets. But have you seen how electricity can make objects stick together? Or make other objects pull apart? Now you can! Explore electricity with the fun experiments you'll find in this book. This series sheds light on a key science question; How Does Energy Work? Hands-on experiments, interesting photos, and useful diagrams will help you find the answer!

Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments.

An introduction to the physical characteristics, habits, and natural environment of the common and the pygmy hippopotamus.

Henry Brown copes with slavery by singing, but after his wife and children are sold away he is left with only his freedom song, which gives him strength when friends put him in a box and mail him to a free state.

"The story of the near-extinction and recovery of the American Chestnut tree."-- American Chestnut trees were once plentiful in North America's eastern forests. They towered up to one hundred feet tall, providing food and shelter for people and animals alike. To many, life without the chestnut was unimaginable - until disaster struck in the early 1900s. What began in the bark of a few trees soon became an unstoppable killing force, traveling across...