Lesson 3Measuring with SI and Metric

Units

SI Units

• There are two types of units:

–fundamental (or base) units;

–derived units.

Units of MeasurementUnits of Measurement

• Powers of ten are used for convenience with smaller or larger units in the SI system.

There are 7 Fundamental (Base) SI There are 7 Fundamental (Base) SI UnitsUnits

Common Non-SI Units

Physical Quantity Name of Unit Abbreviation

Volume Liter L

Temperature Celsius oC

Energy Calorie cal

SI and Metric System Utilize prefixesPowers of ten are used for convenience with smaller or larger

units.

Units of MeasurementUnits of Measurement

Selected Prefixes used in SI System

Linear Measurement

Linear Measurement

• Measurement of1.Distance from place to place2.Size• Measuring Equipment1.Ruler2.Meter Stick3.Tape measure4.LASER

Volume Measurement

Volume Measurement

• Measurement of1. How much space an object takes up2. How much capacity • Measuring Equipment1. Graduated cylinder2. Ruler

Volume

Units of MeasurementUnits of Measurement

Volume• The units for volume

are given by (units of length)3.– SI unit for volume is

1 m3.

• We usually use

1 mL = 1 cm3.• Other volume units:

– 1 L = 1 dm3 = 1000 cm3 = 1000 mL.

Units of MeasurementUnits of Measurement

Mass Measurement

Mass Measurement

•Measurement of How much matter something has

•Measuring Equipment Balance

Temperature Measurement

• A measurement of:

Average kinetic energy of the particles of matter• Measuring equipment

Thermometer• Three temperature scales:

Kelvin Scale

Celsius Scale

Fahrenheit Scale

TemperatureTemperature