Presentation is loading. Please wait. # SI Units.  Students know how to… ◦ convert between °C - °K ◦ Analyze situations/solve problems combining and applying concepts.

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SI Units

 Students know how to… ◦ convert between °C - °K ◦ Analyze situations/solve problems combining and applying concepts.

 In science we use measurements to observe.  Thus we need to assign the correct units in the numerical value to know what we are talking about.

 Most commonly used Units by chemists  Length – meter (m)  Mass – kilogram (Kg)  Temp. – Kelvin (K)  Time – second (sec)  Amount of a substance- mole (mol)  Volume – cubic centimeter (cm 3 )

K H D M D C M

 The space occupied by any sample of matter. ◦ Liter (L) is most commonly used measurement. ◦ Not part of the SI Unit  Volume = length x width x height

 The measurement of the quantity of matter  Weight is different. ◦ A force that measures the pull on a given mass by gravity.  Kg = mass of 1 L of liquid water at 4° C.

 Measured in Kelvin.  Comparison of Kevin to Celsius scales.

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