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Metrics Trix
The SI systemInternational systemSystème international d'unités
A measurement system provides quantitative dataQuantitative means a number is used. You
are measuring a quantity.
Qualitative data:It turned redIt is coldIt started steamingYou are measuring a quality
Basic unitsLinear measurement: meterMass: gram, but Kg is the standardVolume: literTime: secondTemperature: degrees CelsiusAbsolute temperature: Kelvins
Approximations 5 miles is about 8 KmMeter is about a yard2.54 cm = 1 inch1 paper clip is about 1 gram22 pounds = 10 Kg1 liter is about 1 quart3.7 L = 1 gal
KHD_dcm
Best unitsMost sensible numberBest accuracy
Types of measurementsDirectIndirect
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