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Topic: Screw

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Simple machine

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	SMART96 Screw
		SCREW : A screw is a simple machine that is like an inclined plane.
		Take the screw with the second least number of grooves.
		Screw the second screw into the block of wood.
	www.ed.uri.edu /SMART96/ELEMSC/SMARTmachines/screw.html (84 words)

	Dirtmeister: Simple Machines -- Screw
		Screws are used in many different places to hold things together.
		Basically, a screw is like the ramp —; and the width of the thread is like the angle of an inclined plane.
		The wider the thread of a screw, the harder it is to turn it.
	teacher.scholastic.com /dirtrep/simple/screw.htm (128 words)

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