"Describes how a submarine functions in the military with information on diving, surfacing, and navigating underwater. Contains facts and figures on specific submarine models"--Provided by publisher.
This book introduces the continent of Europe, describing its location, climate, geography, animals and plants, countries, people and languages, natural resources, cities, and famous places.
This book looks at batteries, examining what they are, the different types of batteries, and how we use them. The book considers a range of examples that will be familiar to young readers, and explains the scientific concepts behind batteries and electricity in clear, simple langauge.
Explains in basic terms the physical principles behind the use and operation of wheels and gears, with diagrams that provide several examples involving doorknobs, steering wheels, and pulleys.
Explains that screws are simple machines; describes their functions, including gripping, squeezing, connecting, and moving; and includes two hands-on activities.
Explains in basic terms the physical principles behind levers and shows with diagrams how several examples work, including wrenches, pliers, bolt cutters, and levers in machines such as tractors and bicycles.
