What pulls a flag up a flagpole? How does a bicycle chain help the bicycle move? What makes an escalator move? Pulleys and gears are simple machines that can be used to make other machines work. When you take an escalator, ride in a car, use a fishing rod, or wear a watch you are using pulleys and gears. Pulleys and Gears explains what these machines are and how they help you do everyday things....
By Angela Royston
Age Range: 8 and up
Grade Level: 3 and up
Lexile Measure: 940L
Series: Machines in Action
Paperback: 32 pages
Publisher: Heinemann (July 3, 2003)
Language: English
ISBN-10: 1403440859
ISBN-13: 978-1403440853
Product Dimensions: 7.8 x 0.2 x 10.2 inches
Amazon Rank: 4921206
Format: PDF ePub djvu ebook
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