Résultats de "Sally M. Walker" dans Toutes les catégories

You know that magnets hold pictures on a refrigerator. But have you ever found a magnet's north pole? Or turned an ordinary paper clip into a magnet? Now you can! Explore magnetism with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question: how does energy work? Hands-on experiments will help you find the answer!

What do flagpoles and some window blinds have in common? They use pulleys to perform work! Pulleys are simple machines. They help us to do jobs more easily. But don't take our word for it. Put pulleys to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - how do simple machines work? Hands-on experiments will help you find the answer!

What do hammers, wheelbarrows, and brooms have in common? All of them are levers! Levers are simple machines. They help us to do jobs more easily. But don't take our word for it. Put levers to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - how do simple machines work? Hands-on experiments will help you find the answer!

On December 6, 1917, two ships collided in Halifax Harbour. One ship was loaded top to bottom with munitions and one held relief supplies, both intended for war-torn Europe. The resulting blast flattened two towns, Halifax and Dartmouth, and killed nearly 2,000 people. As if that wasn’t devastating enough, a blizzard hit the next day, dumping more than a foot of snow on the area and paralyzing much-needed relief efforts. Fascinating, edge-of-your-seat storytelling based on original source material conveys this harrowing tale.