Sally M. Walker Ordre des livres (chronologique)

Soil can be found almost everywhere on Earth. Sand is a soft soil that is found in deserts. Loam is soil that is great for growing plants. But how are these types of soils different? And how are they made? Explore the amazing world of soil in this book.

This book delves into the principles of electricity, offering clear explanations of its mechanics. It includes a variety of hands-on experiments designed to enhance comprehension of electrical concepts, making it an engaging resource for learners seeking to explore the subject in depth.

Exploring the concept of simple machines, this book highlights the commonality of wheels and axles found in everyday objects like bicycles and doorknobs. It emphasizes how these mechanisms make tasks easier and invites readers to engage with hands-on experiments to test their understanding. The interactive approach encourages learning through play, making science accessible and enjoyable for all.

On February 17, 1864, the H.L. Hunley made history as the first submarine to sink a ship in battle. Soldiers on the shore waited patiently after seeing the submarine's return signal. But after several days, the ship had failed to return. What had gone wrong? In 1995, after over 130 years of searching, the H.L. Hunley was finally found buried off the coast of South Carolina. Follow author, Sally M. Walker on a fascinating journey through the workings of the famous submarine, its voyages, and the difficult obstacles that were overcome to recover, excavate and conserve the ship.

Describes the basic physics behind work and simple machinery.