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Mr. O’Rourke Technology Education
Measurement Mr. O’Rourke Technology Education
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History of Measurement
Ancient Egypt Measured with fingers, palms, arms, etc.
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US Standard Units Focusing on Length Also known as Inches Feet Yards
Miles Also known as English Units US Customary Units
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Measuring Length (standard”)
Dial Calipers Measure inches down to .001” Ruler Measure inches (usually 12”) Each inch broke into 16ths Yard Stick 36”=3’ Tape Measure Measure feet and inches (25’+)
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Metric System Based on the Meter and the number 10
Name The Number Prefix Symbol trillion 1,000,000,000,000tera T billion 1,000,000,000 giga G million 1,000,000 mega M thousand 1,000 kilo k hundred hecto h ten 10 deka da unit 1 tenth deci d hundredth centi c thousandth milli m 1 meter=39.38” millionth micro µ billionth nano n trillionth pico p
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