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Gaffney, Kelly

 
9781474792660: Simple Machines (On Topic)

Sinopsis

Ramps, screws, wheels, pulleys, wedges and levers are all simple machines. Learn about what these machines are and what makes them work. Also find out how to spot simple machines in action all around you!

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Acerca del autor

Kelly Gaffney is a former early childhood teacher who has written for Raintree since 2010. When not writing, Kelly works as an intervention specialist for primary and secondary school-aged children. She lives in Victoria, Australia.

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