1. The Scientific MethodSignificant Figures

3. Observations – hopefully quantitative measurements that appear to relate two or more concepts: heating time and temperature, pond depth and sound of splash, number of “skips” compared to “flatness” of rock, etc.

4. Law – Statement or equation showing the relationship between properties or concepts

5. Hypothesis – a proposal to explain the relationship between one concept or property on another

6. Experiment – set of controlled steps that are meant to determine whether or not the hypothesis is correct. Control for other variables is important

7. More Experiments/Evaluation of Hypothesis – Further tests to see if predicted behavior holds

9. An hypothesis is often changed as new kinds of data or methods of measurement become available.

12. Accuracy vs Precision

14. If you weigh 150 pounds, does that mean you weigh 150 + 0.1 , 150 + 1, or 150 + 10?

17. Determining Significant Figures

18. Rules for Using Significant Figures

19. Rules for Using Significant Figures

20. Using Significant Figures

22. A conversion factor is an equation that relates two different units to one another. Simple: 100 cm = 1 m More difficult: 1 in = 2.54 cm

23. Simple conversion

24. SI Base Units

25. Decimal Conversions

26. English to SI Conversions

27. Temperature Conversion Celsius/Fahrenheit Conversion Relation between degrees: 1 oC = 1.8 oF T(oF) = 1.8 x T(oC) + 32 Celsius/Kelvin Conversion Relation between degrees: 1 oC = 1 K T(K) = T(oC) + 273.15

28. Problems 1.15, 1.19, 1.22, 1.43, 1.49, 1.51, 1.53, 1.57, 1.60, 1.62, 1.67, 1.70, 1.72, 1.74, 1.75, 1.87