From the series Simple Machines Fun!
Wedges
Reading Level Grade 1Interest Level Grades K – 3Copyright 2020
Reviewed
From the series Simple Machines Fun!
Reading Level Grade 1Interest Level Grades K – 3Copyright 2020
ReviewedWedges were some of the first tools humans ever created! Today, these simple machines are found all around, from doorstops to our own front teeth. Diagrams and simple text explain how wedges work, while experiments allow readers test the machines for themselves. Move through the history of wedges, from hand axes to handsaws, in this fascinating title for beginning readers.
These titles describe simple machines to new readers who are eager to learn how they make life easier. Some of the machines are more basic than others, like wedges, levers, and inclined planes. Others, like pulleys, screws, and wheels and axles, require a little more engineering. Pulleys tells readers how rope, wheel, and axle can combine to lift a heavy load with less force and how adding more pulleys (creating a compound pulley) can reduce the effort even further. Bright colors and large text, complemented with illustrative photographs, make these books wonderfully educational. The history of simple machines is discussed in each volume. Perhaps the best part is that each book includes several experiment suggestions, teaching readers how to make a pulley, an Archimedes’ screw, and more with household objects. VERDICT: Fun, educational choices for every collection.
School Library Journal
