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Screws Chris Oxlade

Screws

Chris Oxlade

Published
ISBN : 9780431179001
Paperback
32 pages
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 About the Book 

Many simple machines are taken for granted. How would we manage without wheels, pulleys, ramps, wedges or screws? These are all types of machine. They make it easier to do something. This series explores a range of similar devices at a level suitableMoreMany simple machines are taken for granted. How would we manage without wheels, pulleys, ramps, wedges or screws? These are all types of machine. They make it easier to do something. This series explores a range of similar devices at a level suitable for children working at Key Stage One.