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Inclined Planes

Katie Marsico (author), Reginald Butler (illustrator)

Publisher: The Child's World ISBN: 9781614733409

Readers learn how this simple machine makes it easier to move things to different levels. They learn how flatter slopes use less effort than steeper slopes. By the end of the book, readers know the difference between complex and simple machines and how inclined planes are used in everyday life to make lifting and lowering objects easier.