Scientific Measurement

Questions to Ponder:Why is measurement important?What are the different types of measurement? What do you know already?What do you think we will focus on when studying measurement?

Types of Measurements

Types of Measurements

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Types of Measurements

Types of Measurement

Accuracy vs. Precision

Accuracy – how close to actual or true value

Accuracy vs. Precision

Accuracy – how close to actual or true value

Precision – how close measurements are to one another

Accuracy vs. Precision

Significant Figures

Important when making measurements in experiments

Significant Figures

Important when making measurements in experimentsAll digits known with certainty plus one estimated or uncertain digit

Length

Basic SI unit = meterCommon: millimeters, centimeters, kilometersRunning races: 5K, 10K

Volume

SI Unit = LitersCC’s = cubic centimeters1 CC = 1mL1 cubic dm = 1LVolumetric flasks, graduated cylinders

Mass

SI Unit = gramMeasured using a balance.

Temperature

SI Unit = KelvinCelsius – historyKelvin = -273.15 C = 0 K

Accounts for absolute zero (-273.15C)

Practice Temperature Conversions

170 Celsius to Kelvin87 K to Celsius

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Exit Slips - Feedback

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