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# Measurements in science

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• ### Measurements in science

1. 1. Measurements in Science Mr Kremer’s Grade 9 Class Image: http://www.bjj.org/another-zombie-attack
2. 2. SI Units
3. 3. SI Units
4. 4. Dimensional Analysis
5. 5. Dimensional Analysis
6. 6. Dimensional AnalysisHow manyseconds in2.4 hours?
7. 7. Dimensional AnalysisHow manyseconds in2.4 hours? 2.4 hrs 60 min 60 s 1 hr 1 min
8. 8. Dimensional AnalysisHow manyseconds in2.4 hours? 2.4 hrs 60 min 60 s 1 hr 1 min 8640 s
9. 9. Dimensional AnalysisHow many days in5.9x106 s?
10. 10. Dimensional AnalysisHow many days in5.9x106 s? How many gigaseconds in 3.2x1012 nanoseconds?
11. 11. Dimensional AnalysisHow many days in5.9x106 s? How many gigaseconds in 3.2x1012 nanoseconds?How many dg in 1.2 kg?
12. 12. Dimensional AnalysisHow many days in5.9x106 s? How many gigaseconds in 3.2x1012 nanoseconds?How many dg in 1.2 kg? How many m2 in 100 cm2?
13. 13. Dimensional AnalysisWhat if there aremultiple units in the question?5.6 m 1 km 60 s 60 min s 1000 1 min 1 hr m 20.16 km/ hr
14. 14. Dimensional AnalysisWhat if there are Example:multiple units in How many the question? km/hr is 5.6 m/s?5.6 m 1 km 60 s 60 min s 1000 1 min 1 hr m 20.16 km/ hr
15. 15. Dimensional AnalysisWhat if there are Example:multiple units in How many the question? km/hr is 5.6 m/s?1st convert one unit. In this case, km ➜ m5.6 m 1 km 60 s 60 min s 1000 1 min 1 hr m 20.16 km/ hr
16. 16. Dimensional AnalysisWhat if there are Example:multiple units in How many the question? km/hr is 5.6 m/s?1st convert one Next convert the unit. In this other unit. In case, this case, s ➜ hr km ➜ m5.6 m 1 km 60 s 60 min s 1000 1 min 1 hr m 20.16 km/ hr
17. 17. Dimensional AnalysisWhat if there are Example:multiple units in How many the question? km/hr is 5.6 m/s?1st convert one Next convert the unit. In this other unit. In case, this case, s ➜ hr km ➜ m (5.6 x 1 x 60 x 60)5.6 m 1 km 60 s 60 (1 x 1000 x 1 x 1) min s 1000 1 min 1 hr m 20.16 km/ hr
18. 18. Dimensional Analysis60 km/hr in m/ s? PRACTICE THESE!
19. 19. Dimensional Analysis60 km/hr in m/ s? 90 km3 in m3? PRACTICE THESE!
20. 20. Dimensional Analysis60 km/hr in m/ s? 90 km3 in m3? PRACTICE THESE! 52 Mm/hr2 in m/s2?
21. 21. Dimensional Analysis60 km/hr in m/ s? 90 km3 in m3? PRACTICE THESE! 52 Mm/hr2 in 19 mg μm/ m/s2? hr2 in kg m/ s2?