# Volume and Mass

•What methods can we employ to measure matter?

•What are the shortcomings of volume as a measure of matter?

•What does mass measure?

•How is mass different from weight?

•What limits do our measuring devices impose on our confidence of results?

*Volume and mass are the two different ways in which we measure matter

*Volume is not best way to compare or measure matter due to its dependence on temperature and pressure

*Mass is amount of matter contained in an object,

*Volume is the amount of space an object occupies,

both mass and volume involve counting and comparing units of measure,

*Weight is force imposed upon an object by gravity

*Mass stays constant within normal ranges of temperature and pressure

*Measuring devices have certain and discrete sensitivities,

a measurement must contain a magnitude, units and uncertainty

*Work in a laboratory,

*Collect gas using liquid displacement

*Safely operate alcohol burners and micro-burners

*Read a scale accurately

*Determine the uncertainty of measuring devices

*Measure volume of regular and irregular solids

*Measure mass using single pan balance

*Compare objects using mass, volume

*Determine best mode of comparing matter

*Record data in clear organized manner

*Compare class data

*Formulate conclusions based on class data

*Lab notebooks

*Daily preparation

*Class participation

*Quizzes, tests

*Projects

*Self-assessment through reflection

Introductory Physical Science, 7th edition, Haber-Schiam,Cutting, Kirksey, Pratt