1. UMI July 14, 2015 Metrics 素材风暴： http://www.sucaifengbao.com/ PPT 模板： http://ppt.sucaifengbao.com/ AE 视频： http://ae.sucaifengbao.com/ PSD 素材： http://www.sucaifengbao.com/html/psd/ 矢量素材： http://www.sucaifengbao.com/html/vector/ Flash 素材： http://www.sucaifengbao.com/html/flash/ 图片素材： http://www.sucaifengbao.com/html/photo/ PS 插件： http://www.sucaifengbao.com/html/pschajian/

2. Commonly used metric system units and symbol Quantity measuredUnitSymbolRelationship Length, width, distance, thickness, girth, etc. millimetermm10 mm=1 cm centimetercm100 cm=1 m meterm kilometerkm1 km=1000 m Mass (“weight”)* milligrammg1000 mg=1 g gramg kilogramkg1 kg=1000 g metric tont1 t=1000 kg Timeseconds Temperaturedegree Celsius°C Areasquare meterm² hectareha1 ha=10 000 m² square kilometerkm²1 km²=100 ha VolumemillilitermL1000 mL=1 L cubic centimetercm³1 cm³=1 mL literL1000 L=1 m³ cubic meterm³ Speed, velocitymeter per secondm/s kilometer per hourkm/h1 km/h=0.278 m/s Density kilogram per cubic meter kg/m³ ForcenewtonN Pressure, stresskilopascalkPa PowerwattW kilowattkW1 kW=1000 W EnergykilojoulekJ megajouleMJ1 MJ=1000 kJ kilowatt hourkW·h1 kW·h=3.6 MJ Electric currentampereA

3. Two Metrics 1.Linear Measure 2.Mass

4. The Metric System: NameThe NumberPrefixSymbol trillion1,000,000,000,000teraT billion1,000,000,000gigaG million1,000,000megaM thousand1,000kilok hundred100hectoh ten10dekada unit1 tenth0.1decid hundredth0.01centic thousandth0.001millim millionth0.000 001microµ billionth0.000 000 001nanon trillionth0.000 000 000 001picop metric prefixes

5. Linear Measure: To measure the segment, such as length, width etc. Unit: 1.The Metric System 2.The English System

6. 1.Metric System: Metric prefixes, combined with the base unit meter, name different units of length UnitSymbol Relationship to Base Unit kilometerkm1000m hectometerhm100m dekameterdm10m metermbase unit 1m decimeterdm0.1m centimetercm0.01m millimetermm0.001m

7. Example: Complete each of the following 1.1.4 km = ______________ m 2.285 mm = _____________ m 3.0.03 km = _____________ cm

8. Solve:

9. Practice: Fill the Followings

10. Solve:

11. Practice: Fill the Following meter 23 m3.5 m millimeter1000 mm meter1 m23m3.5 m millimeter1000 mm23000 mm3500 mm

12. Solve:

13. Mass Measure: To measure Mass, Newton pointed out that in everyday life the word weight Is used for what is really mass Unit: 1.The Metric System 2.The English System

14. 1.Metric System: Metric prefixes, combined with the base unit gram, name different units of mass UnitSymbol Relationship to Base Unit ton (metric)t1000000g kilogramkg1000g hectogramhg100g dekagramdag10g gramgbase unit 1g decigramdg0.1g centigramcg0.01g milligrammg0.001g

15. Example: Complete each of the following:

16. Solve:

17. Thank you