•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
*Self-assessment through reflection
Introductory Physical Science, 7th edition, Haber-Schiam,Cutting, Kirksey, Pratt