Amazing Science: Simple Machines

3 books in series
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Roll, Slope, and Slide Summary

Skateboards, roller coasters, and playground slides, all of these are ramps. From award-winning author Michael Dahl, this book provides an introduction to one of the most important machines humans rely on. With fun facts, find out how people use ramps every day.

©2021 Michael Dahl, Denise Shea (P)2013 Capstone Publishers, Inc.
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