Sally M. Walker

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!

"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...

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.

Describes the 1938 discovery of the coelacanth, a fish previously believed to be extinct, and subsequent research about it.

Introduces glaciers, including how they were formed, how they move, and their importance to the geography and ecology of the world, and discusses ways that we can reduce the deterioration of the glaciers before it is too late.