Measurement and Units

Mass

Mass

Objectives:State what mass is.State the SI unit of mass.Use instruments to measure mass.

Mass

Mass is the amount of matter in an object. The SI unit of mass is kilogram (kg).

Standard 1kilogram mass made from platinum-iridium alloy kept at Sevres at the International Office of Weights and Measures

Mass

Instruments to Measure Mass

Triple Beam Balance

Lever Balance

Electronic Mass Balance

Mass

Common MisconceptionsWeight vs Mass

Weight is the effect of gravity on mass. It changes from location to location.

Mass cannot be measured by a

spring balance, weight can.

Conclusion

Mass is a measure of the quantity of matter in an object.

It is measured in kilograms (SI unit)Mass is not weight.Mass is measured by lever, beam and

electronic mass balances