Holding a Door Open: Wedge vs. Wheels and Axles

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Holding a Door Open: Wedge vs. Wheels and Axles

From the Series First Step Nonfiction — Simple Machines to the Rescue

Which makes it easier to lift a large toy—a wedge or wheels and axles? Readers will see how a group of kids compares two simple machines and decides which one does a better job at lifting the… Read More →

  • Lexile: 410
  • ATOS: 1.5
  • Dewey: 621.8