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Standards of Measurement

Standards of Measurement. Section 1.2. Measurement. Standard- exact quantity people agree to use for comparison Unit- description of what standard was used SI system- international system of units Allows easy communication between scientists

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Standards of Measurement

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  1. Standards of Measurement Section 1.2

  2. Measurement • Standard- exact quantity people agree to use for comparison • Unit- description of what standard was used • SI system- international system of units • Allows easy communication between scientists • g, m, L, s, A, K, mol - base units- unit by itself

  3. Metric Prefixes • Giga- 1,000,000,000 G • Mega- 1,000,000 M • Kilo- 1,000 k • Hecto- 100 h • Deca – 10 da • Base Unit • Deci- 0.1 d • Centi- 0.01 c • Milli- 0.001 m • Micro- 0.000001 μ

  4. Metric Conversions • Conversion factor- ratio equal to 1 that can be used to convert between units • Volume- space occupied by an object • Mass- amount of matter in an object • Density- mass per unit volume- reason same volume may have different mass • Derived unit- combinations of base units • g/ml

  5. Temperature • Temperature- measure of average KE of molecules • Celsius • Fahrenheit • Kelvin • 0 K = -273.15oC • K = oC + 273.15 • oC = K -273.15

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