Simple Machines by D. J. Ward

Let's-Read-And-Find-Out Science 2

Simple Machines

D. J. Ward with Mike Lowery (Illustrator)

40 pages paperback

2 editions

nonfiction childrens nature science technology informative lighthearted medium-paced
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Machines help make work easier, like when you need to lift something heavy or reach way up high. There are six simple machines: the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw. Can you adjust a seesaw to lift an eleph...

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