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2. Why the metric system? decimal systems based on 10 (easy math!!) used in most of the world – cars, factories, building construction used everywhere by scientists (can’t use anything else in science!!) 2

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4. In the metric and SI systems, one unit is used for each type of measurement: MeasurementMetriccommon Lengthmeter (m)distance Volumeliter (L)liquids Massgram (g)weight Timesecond (s) TemperatureCelsius (  C)(Fahrenheit) Kelvin (K) 4

5. 5 makes units larger or smaller Pneumonic device!!! king henry died by drinking choc. milk k h da base d c m Kilo hecto deka (base unit) deci cent milli GRAM – g LITER – L METER - m  Note: if the m is first it is milli  Note: if the m is second it is meter mL = milliLiter dm = decimeter

6.  Mass of paperclip = 1 gram  Width of jumpdrive = 1 centimeter  Large pop bottle = 2 Liters  Width of wire of paperclip = 1 millimeter  Nickel = 5 grams  Penny = 2.5 grams  Doorknob height = 1 meter  CD diameter = 12 centimeter 6

7. What unit would you use to measure A. your height? B. your mass? C. the distance between two cities? D. the width of an artery? 7

8. An equality states the same measurement in two different units can be written using the relationships between two metric units Example: 1 meter is the same length as 100 cm and 1000 mm. 1 m =100 cm 1 km =1000 m 1 in = 2.54 cm (English to Metric) 8

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10. 10 1 mL = 1 cm 3

11. Several equalities can be written for mass in the metric (SI) system. Example: 1 gram is the same mass as 1000 mg and 0.001 kg. 1 kg = 1000 g 1 g = 1000 mg 1 kg = 2.2 lbs (metric to English) 11

12. How many Liters are equal to 1357 mL? How many kilograms are equal to 345 cg? 0.25 kg is equal to how many grams? How many mL are equal to 2.78 L? 147 mL is equal to how many Liters? How many mg are equal to 0.275 kg? 12

13. How many Liters are equal to 1357 mL? 1.357 L How many kilograms are equal to 345 cg? 0.00345 kg 0.25 kg is equal to how many grams? 250 g How many mL are equal to 2.78 L? 2780 mL 147 mL is equal to how many Liters? 0.147 L 13