September 23, 2010

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DRILL: LETTER YOUR RESPONSES ON A SEPARATE SHEET OF PAPER. RESPONSES WILL BE COLLECTED

Answer these questions in complete sentences.1) What are the consequences of coming late to class without a

pass.2) What are the consequences of talking in class when the

teacher is talking.3) Why should you not talk when the teacher is talking?4) What are the consequences of talking in class when another

student is speaking to the class.5) Why should you not talk when other students are speaking to

the class.6) What are the consequences of having more than two

detentions?

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METROLOGY is the science of measurement, based on the Greek word ‘metron’.METROLOGY should not be confused with meteorology.

Yesterday, with a partner, you were to discuss and make a list of the following:1.Why do we measure?2.What do we measure?3.How do we measure?4.When do we measure?5.Where do we measure?6.Who measures?

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INTRODUCTION TO METROLOGY

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Measuring instruments

• Ruler• Thermometer• Barometer• Clock• Scale• Voltmeter• GPS• Hydrometer• Viscometer

• Graduated Cylinder• Radar Gun• Speedometer• Tachometer• Accelerometer• Spectrometer• Protractor• Compass• Sphygmomanometer

What do we measure?

• Length – Length• Area – Length2

• Volume – Length3

• Time – Time• Speed – Length/Time• Acceleration – Length/Time2

• Mass• Density - Mass/Volume

Fundamental Measurements

• International System of Units has 7 basic units Length – meters

Time – seconds

Mass – kilograms

Amount of Material – moles

Light Intensity – candela

Electrical Current – ampere

Temperature - K

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We will now look at 3 of the 7 base units in the International System of Units (SI).

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LENGTH

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MASS

TIME

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"METROLOGY is the science and art of measurement. Measurement is extracting information from nature or from devices people have engineered. It is also about the uncertainty in the extracted data, communicating it to other people in a standard way, and making them confident in our measurements by establishing traceable measurement systems.“ Copyright © 1998-2006 Newton Metrology Ltd.

You will now receive a 4-sided concise summary of the International System of Units (SI).

Read and study this summary now, as it may help you to find some answers to the homework.

September 23, 2010

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HOMEWORK:

LETTER your answers. Use complete sentences.

Define the following 10 terms:

STANDARD, ACCURACY, PRECISION, CALIBRATION,

TRACEABILITY, DERIVED UNIT, BASE UNIT, ERROR,

PERCENTAGE OF ERROR, UNCERTAINTY

BRING YOUR RULER, PROTRACTOR, AND COMPASS TOMORROW.