This chapter describes the importance of accurate measurements and calculations in the study of chemistry. The chapter presents the International System of Units (SI) as the measuring system scientists use, and discusses measurement of mass, volume, density, specific gravity, and temperature. In chemistry, measurements are described by their accuracy, precision, and percent error, and are written using scientific notation. In this chapter, you will learn how to report the correct number of significant figures in measurements and calculations.

In this chapter, you will learn: to distinguish between quantitative and qualitative measures to distinguish among accuracy, precision and error to identify the number of significant figures to use SI units of measurement to distinguish between mass and weight to calculate the density of an object to convert between Celsius and Kelvin temperatures