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Ruler
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: The [[height]] of the [[Scientist|scientist's]] friends was found using a '''ruler'''.
: The [[Scientist|scientist's]] '''ruler''' was too short to [[measure]] the [[distance]] form the office to the [[laboratory]]
==Key Stage 2==
===Meaning===
A '''ruler''' is a [[Scientific Instrument]] used to measure distance between objects or the lenght, width and height of an object.