Tool&l measuremen(m4)t
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The document discusses units of measurement used in the metric system for length, mass, volume, and time. It explains that the metric system uses SI units which are based on meters, kilograms, seconds, and kelvins. It differentiates between mass, which is a measure of the amount of matter, and weight, which is the force exerted by mass due to gravity. Various tools for measurement are also introduced, such as balances, scales, graduated cylinders and thermometers.
Tool&l measuremen(m4)t
- 2. Recall (Recall (ทบทวนทบทวน)) UNITS OF MEASUREMENTUNITS OF MEASUREMENT UseUse SI unitsSI units — based on the metric system— based on the metric system LengthLength MassMass VolumeVolume TimeTime TemperatureTemperature Metre, mMetre, m Kilogram, kgKilogram, kg Seconds, sSeconds, s kelvins, Kkelvins, K Cubic metre ,mCubic metre ,m33
- 3. Mass vs. WeightMass vs. Weight • Mass: Amount ofMass: Amount of Matter (grams orMatter (grams or kilograms measuredkilograms measured with a BALANCE)with a BALANCE) • Weight: ForceWeight: Force exerted by the mass,exerted by the mass, only present withonly present with gravity (Newton,gravity (Newton, measured with ameasured with a SCALE)SCALE) Can you hearCan you hear me now?me now?
- 4. A BALANCEA BALANCE A ScaleA Scale
- 5. EqualitiesEqualities State the same measurement in twoState the same measurement in two different unitsdifferent units lengthlength 10.0 in.10.0 in. 25.4 cm25.4 cm
- 6. Instruments for Measuring VolumeInstruments for Measuring Volume Graduated cylinder Syringe Volumetric flaskBuret Pipet
- 7. Units of Measuring VolumeUnits of Measuring Volume 1 L = 1000 mL 1 qt = 946 mL Timberlake, Chemistry 7th Edition, page 3
- 8. Reading a MeniscusReading a Meniscus
- 9. Units for Measuring MassUnits for Measuring Mass 1 kg = 2.20 lb Timberlake, Chemistry 7th Edition, page 3
- 10. Quantities ofQuantities of MassMass Kelter, Carr, Scott, Chemistry A Wolrd of Choices 1999, page 25 Earth’s atmosphere to 2500 km Ocean liner Indian elephant Average human 1.0 liter of water Grain of table salt Typical protein Uranium atom Water molecule 1024 g 1021 g 1018 g 1015 g 1012 g 109 g 106 g 103 g 100 g 10-3 g 10-6 g 10-9 g 10-12 g 10-15 g 10-18 g 10-21 g 10-24 g Giga- Mega- Kilo-Kilo- base milli-milli- micro- nano- pico- femto- atomo-
- 11. Some Tools for MeasurementSome Tools for Measurement Which tool(s)Which tool(s) would you usewould you use to measure:to measure: A.A. temperaturetemperature B.B. volumevolume C.C. timetime D.D. weightweight
- 12. Learning CheckLearning Check MatchMatch L) lengthL) length M) massM) mass V)V) volumevolume ____ A. A bag of tomatoes is 4.6 kg.____ A. A bag of tomatoes is 4.6 kg. ____ B. A person is 2.0 m tall.____ B. A person is 2.0 m tall. ____ C. A medication contains 0.50 g____ C. A medication contains 0.50 g Aspirin.Aspirin. M L M V
- 13. Learning CheckLearning Check What are some U.S. units thatWhat are some U.S. units that are used to measure each ofare used to measure each of the following?the following? A. lengthA. length B. volumeB. volume C. weightC. weight D. temperatureD. temperature
- 14. Learning CheckLearning Check Select the unit you would use to measureSelect the unit you would use to measure 1. Your height1. Your height a) millimetersa) millimeters b) metersb) meters c) kilometersc) kilometers 2. Your mass2. Your mass a) milligramsa) milligrams b) gramsb) grams c) kilogramsc) kilograms 3. The distance between two cities3. The distance between two cities a) millimetersa) millimeters b) metersb) meters c) kilometersc) kilometers 4. The width of an artery4. The width of an artery a) millimetersa) millimeters b) metersb) meters c) kilometersc) kilometers
- 15. SolutionSolution 1. Your height1. Your height b) metersb) meters 2. Your mass2. Your mass c) kilogramsc) kilograms 3. The distance between two cities3. The distance between two cities c) kilometersc) kilometers 4. The width of an artery4. The width of an artery a) millimetersa) millimeters
- 16. 1. 1000 m = 11. 1000 m = 1 ______ a) mm b) km c) dma) mm b) km c) dm 2. 0.001 g = 12. 0.001 g = 1 ______ a) mg b) kg c) dga) mg b) kg c) dg 3. 0.1 L = 13. 0.1 L = 1 ______ a) mL b) cL c) dLa) mL b) cL c) dL 4. 0.01 m = 1 ___4. 0.01 m = 1 ___ a) mm b) cm c) dma) mm b) cm c) dm Learning CheckLearning Check
- 17. 1. 1000 m = 11. 1000 m = 1 ______ a) mma) mm b) kmb) km c) dmc) dm 2. 0.001 g = 12. 0.001 g = 1 ______ a) mga) mg b) kg c) dgb) kg c) dg 3. 0.1 L = 13. 0.1 L = 1 ______ a) mL b) cLa) mL b) cL c) dLc) dL 4. 0.01 m = 1 ___4. 0.01 m = 1 ___ a) mma) mm b) cmb) cm c) dmc) dm Learning CheckLearning Check
Editor's Notes
- #8: UNITS OF MEASURING VOLUME A measurement has two parts: a number and a unit. Note: NO NAKED NUMBERS
- #10: UNITS FOR MEASURING MASS Mass – amount of substance present. Does not change when going to the moon. Mass is measured on a pan balance. Weight – related to gravity. Your weight is about 1/3 on the moon and 3X on Jupiter. As gravity increases your weight increases. Pull of gravity on jet fighter planes – make your arms and legs very heavy and g-forces increase. Weight is measured on a scale.