2. 11/22/2015Mrs. Bauman Tools of a Scientist

3. 11/22/2015Mrs. Bauman Objectives 1.To identify different tools used in science. 2.To determine the appropriate units to use for particular measurements. 3.To convert from one metric unit to another.

4. Tools of the trade Would you use a hammer to tighter a bolt on a bicycle? Why not? A tool is anything that helps you do a task (BUT tools designed to perform specific tasks work better than a substitute) 11/22/2015Mrs. Bauman

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6. The International System of Units Scientists use a common language and system of measuring. This system is called the International System of Units or SI. (We sometimes call this the metric system) By having a common language scientists can easily compare their data. 11/22/2015Mrs. Bauman

7. Another advantage of SI units is that all units are based on the number 10! This makes it very easy to convert from one unit to another

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9. KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit CENTI 0.01 Unit MILLI 0.001 Unit Meters Liters Grams Conversions Using the Ladder Method How do you use the “ladder” method? 1 st – Determine your starting point. 2 nd – Count the “jumps” to your ending point. 3 rd – Move the decimal the same number of jumps in the same direction. 4 km = _________ m 1 2 3 How many jumps does it take? Starting Point Ending Point 4. 1 __. 2 3 = 4000 m

10. Try these conversions using the ladder method. 1000 mg = _______ g 1 L = ______ mL 160 cm = ______ mm 14 km = _______ m109 g = ______ kg 250 m = ____ km Conversion Practice Compare using, or =. 56 cm 6 m 7 g 698 mg

11. Try these conversions using the ladder method. 1000 mg = ____1___ g 1 L = ____1000___ mL 160 cm = ___1600____ mm 14 km = __14000_____ m109 g = ___0.109____ kg 250 m = __0.250___ km Conversion Practice Compare using, or =. 56 cm 698 mg

12. Write the correct abbreviation for each metric unit. 1) Kilogram _____ 4) Milliliter _____ 7) Kilometer _____ 2) Meter _____ 5) Millimeter _____ 8) Centimeter _____ 3) Gram _____ 6) Liter _____ 9) Milligram _____ Try these conversions, using the ladder method. 10) 2000 mg = __2_____ g 15) 5 L = ____5000___ mL 20) 16 cm = __160____ mm 11) 104 km = __104000_ m 16) 198 g = ___0.198____ kg 21) 2500 m = ____2.5___ km 12) 480 cm = __4.8___ m 17) 75 mL = _____ L 22) 65 g = _____ mg 13) 5.6 kg = _____ g 18) 50 cm = _____ m 23) 6.3 cm = _____ mm 14) 8 mm = _____ cm 19) 5.6 m = _____ cm 24) 120 mg = _____ g Metric Conversion Challenge

13. Compare using, or =. 25) 63 cm 6 m 27) 5 g 508 mg 29) 1,500 mL 1.5 L 26) 536 cm 53.6 dm 28) 43 mg 5 g 30) 3.6 m 36 cm T. Trimpe 2008 http://sciencespot.net