1. 1 Using Numbers in Science AND Metric System

2. 2 Scientific Measurements Made in metric units Referred to as the International System or SI units Based on the decimal system Related by powers of 10 Each type has a base unit Use prefixes to refer to a unit larger or smaller than the base by some power of 10

3. 3 SI (International System) units Lengthmeterm Masskilogramkg TemperatureKelvinK TimesecondS VolumeLiterL Centigrade or Celsius = ºC This is the unit we will use in lab for temperatures!

4. Prefixes for Metric Units <1 deci (d) = 1/10 = 0.1 centi (c) = 1/100 = 0.01 milli (m) = 1/1000 = 0.001 decimilli (dm) 10 -4 centimilli (cm) 10 -5 micro ( µ) 10 -6 = 1/100000 = 0.000001 4

5. Prefixes for Metric Units >1 deka (da) = 10 hecto (h) = 100 kilo (k) = 1000 5

6. 6 Kilometer

7. 7 Meter

8. 8 Centimeter

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13. 13 kilohectodecaBase Unit decicentimillimicro khdagram (g)dcmmμ 100010010liter (L).1.01.0010.000001 10 3 10 2 10 1 meter (m)10 -1 10 -2 10 -3 10 -4 10 -5 10 -6 Metric Unit Conversions (blue chart)

14. 14 Comparison Ideas equals

15. Class Activity What are the correct abbreviations? 15 ____ milligram____ milliliter____ liter_____centimeter ____ kilogram____ millimeter____ kilometer____ gram ____ meter____ millisecond____ microgram ____ micrometer____ microliter

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19. Review Questions 1. What does the prefix "milli" mean? A.millionth millionth B.thousandththousandth C.hundredthhundredth 2.A liter is a little more than a _______ A.pound pound B. gallon gallon C. quartquart 19

20. 3. What is a good height for a basketball player? A. 6 meters6 meters B. 2 meters2 meters C. 6 millimeters6 millimeters 4. Which is the longer distance to run ? A. 50 meters 50 meters B. 50 kilometers 50 kilometers C. 50 miles50 miles 20

21. 5. Which value would be right for the mass of a A. 17 mg B. 17 g C. 17 kg 6. Which value would be right for the mass of a A. 460 mg B. 460 g C. 460 kg