Measurements are quantitative observations SI base units and their definition Derived SI units Rules of using SI units Converting units 5.Density and Percent Composition:Their Use in Problem Solving Measuring and calculating density Calculating percent composition 6.Uncertainties in Scientific Measurements Definition of uncertainty Precision and accuracy 1-7 Significant Figures Definition of significant figures Significant figures in calculations 4. 教学方法 多媒体教学： Illustration ofscientific methods Illustration ofclassification of matters Illustration ofmatterat microscopic level ● Illustration ofdifferent types of measurements Illustration ofsignificant figure in calculations 互动教学： What kind of matter is...(air,oxygen,tap water,distilled water,soda,woods)? Why need to standardize units? How to achieve precision and accuracy? How to determine uncertainty in measurement? How to maintain the precision of measurement during calculation? 5. 教学评价 课后问题：Measurements are quantitative observations SI base units and their definition Derived SI units Rules of using SI units Converting units 5. Density and Percent Composition: Their Use in Problem Solving Measuring and calculating density Calculating percent composition 6. Uncertainties in Scientific Measurements Definition of uncertainty Precision and accuracy 1-7 Significant Figures Definition of significant figures Significant figures in calculations 4. 教学方法 多媒体教学： • Illustration of scientific methods • Illustration of classification of matters • Illustration of matter at microscopic level • Illustration of different types of measurements • Illustration of significant figure in calculations 互动教学： • What kind of matter is … (air, oxygen, tap water, distilled water, soda, woods)? • Why need to standardize units? • How to achieve precision and accuracy? • How to determine uncertainty in measurement? • How to maintain the precision of measurement during calculation? 5. 教学评价 课后问题：