Up, down, or open-moving machines
By: by Michele Spirn
Series: Macmillan McGraw-Hill leveled reader library. Informational nonfiction. Science. Forces in motion
Publisher: Macmillan/McGraw-Hill
Published: 2006
Place of publication: New York, N.Y
Language: eng
Number of pages: 20
ISBN-13: 9780021928385
Subjects: Simple machines; Juvenile literature; Machine design; History; Readers (Elementary); Readers (Primary); Machines simples; Ouvrages pour la jeunesse; Machines; Conception et construction; Histoire; Anglais (Langue); Lectures et morceaux choisis (Enseignement primaire)
Description: Discusses how simple machines work using drawbridges, escalators, and retractable roofs as examples.
Notes: "3.5 Week 3."

Includes index.

GR R, Benchmark 40, Lexile 820.