3.2 Units of Measurement Do Now: Based off prior knowledge of math, convert the following: 6 meters to centimeters 0.008 milliliters to deciliters 1300.

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Presentation transcript:

3.2 Units of Measurement Do Now: Based off prior knowledge of math, convert the following: 6 meters to centimeters milliliters to deciliters 1300 kilogram to grams

Units of Measurement From last lesson, measurement consist of both a number and a unit Units are important to communicate a specific measurement to someone 28° – With no units, 28 degrees can either be really warm ( C ) or really cold ( F )

International System of Units (SI) Metric system, based of 10 so it is easy to convert Most countries goes by the metric system (like a universal language)

QuantitySI base symbolSymbol LengthMeterm MassKilogramkg VolumeCubic meterm3m3 TemperatureKelvinK DensityKilogram per meter cubed kg/m 3 TimeSecondss Amount of substanceMolemole Luminous IntensityCandelacd Electric CurrentAmpereA EnergyJouleJ

KiloHectaDekaUnitsDeciCentiMilli khDUnitdcm Metric Prefixes

Other Metric Prefixes Common in Science MegaMicroNanoPico Mµnp

Other units terms Liters- volume of a cube that is 10cm all around (used for liquids) Weight- force that measures pull on a given mass by gravity (mass x gravity) Temperature- measure of how hot or cold something is

Temperature Kelvin- SI unit for temperature – Freezing Point of water is K Celsius- also used in metrics – Freezing Point of water is 0°C Absolute zero- 0K or °C – This is where all matter stops moving

Converting Celsius to Kelvin – Add Kelvin to Celsius – Subtract

Try These Out Convert 28.7 °C to Kelvin Convert 118°C to kelvin Convert 137K to °C

Density mass volume

Example Problems The mass of a copper penny is 3.1g. The volume is 0.35cm 3. What is the density of copper? The density of mercury is 13.6g/cm 3. If the mass of the sample of mercury is 2.50g, what is the volume of mercury?