Chapter 1 Exercises and Comments
Sect.	Comments	Practice Exercises
1.1	Explain what matter is.
1.2	Classify a property as physical or chemical. Classify a change as physical or chemical.	8, 10
1.3	Use key terms to describe molecules.	16
1.4	Classify matter using the key terms pure substance or mixture, homogeneous or heterogeneous, element, or compound.	18, 20, 22
1.5	Cover.
1.6	Do metric to metric conversions. Interconvert ºF and ºC;  ºC and Kelvin. Know the common prefixes kilo, deci, centi, milli, and micro on page 13. You don't have to memorize the conversions on page 17. Skip Learning Check (LC) 1.5 and 1.6 and Example (E) 1.5.	36
1.7	Interconvert regular numbers and numbers in scientific notation. Multiply and divide numbers in scientific notation.	46, 48, 54, 58
1.8	Determine the number of significant figures in a measurement. Multiply, divide, add and subtract, expressing answers in correct significant figures.	62, 64, 68, 70, 72
1.9	Use the factor-unit method of problem solving.	80, 86
1.10	Do percent calculations.	88
1.11	Do density calculations.	98