This book is suitable for ages 7 to 8 years. Screws are everywhere! From the cap on a bottle to a farmer's combine, screws help us lift, grip, squeeze, and move. Come inside the book to learn all about this fascinating simple machine.
Get ready to learn all about inclined planes in this book from the series Get to know simple machines. See inclined planes at work in ramps, staircases, trails and roads, chutes and slides and funnels. Children learn the simple physics of force, friction, energy and gravity in this book suitable for p ...Show more
Levers play an important part in all our lives. Without them we could not row a boat, move a wheelbarrow, or open a bottle. This book from the series Get to know simple machines teaches children about the different kinds of levers. Simple and easy-to-follow layouts and diagrams explain how levers lift t ...Show more
Pulleys help make up some of the most complicated machinery, from car engines to cranes. You can see how pulleys lift and move heavy things, how pulleys work together, and the different kinds of pulleys in this book from the series Get to know simple machines. Includes instructions on how to build thre ...Show more
Wedges are used to separate, lift, or hold things in place. One of humankind's most ancient tools, the wedge has a place in almost everyone's daily life. Find out all about wedges in this book from the series Get to know simple machines. This book is suitable for ages 7 to 8 years.
Read all about wheels and axles and their many uses in this book from the series Get to know simple machines. Children will learn of the many uses of wheels and axles, from doorknobs to the insides of a clock. There are wheels that move, turn, steer, and serve as gears.