By inventing ways to travel on water, people have been able to see and trade with new lands, conquer new territories, fight great sea battles and enjoy new sports. This book will help you to understand why ships have played such an important part in human history. With the aid of cross-section illustrations and simple experiments to do at home, you will discover how vessels stay afloat, how a sail works, what keeps a submarine underwater, how a hovercraft skims on air, the elements of navigation, and much more.

This is a bumper collection of 150 experiments and projects that explain a wide range of scientific facts and processes, and demonstrate how machines work. The step-by-step instructions are easy to follow, and are demonstrated in over 1300 photographs. The projects are arranged thematically to reflect different areas of science and technology, such as earth sciences, the natural world, physics and technology, and transport.

This title comes with 20 easy-to-do experiments and 300 exciting pictures. It tells the story of technology, from simple gears and levers to high-tech gadgets and gizmos. It covers all the basics of how things work - with fascinating photographs of machines in action, plus accessible inside-view diagrams. Practical projects help you to make your own minimachines, including a windmill and a vacuum cleaner! It is ideal for 8- to 12-year-olds, for home and school use. The screw, the wedge, the lever and the sloping ramp are the foundations of much more complicated machines. This book explains...