NOTES: PRESENTING DATA

Scientific Notation  Expressing a value as the product of a number between 1 & 10 and a power of 10  Makes very large or small numbers easier  300,000,000  3.0 x 10 8   7.65 x  Decimal is placed after first non zero #  Spaces counted to give you the exponent  34,000     5.06 x 10 5   8.95 x 

SI Units  Units Describe a number  Base Units QuantityUnitSymbol LengthMeterM MassKilogramKg TempKelvinK TimeSecondS

SI Units  Derived Units QuantityUnitSymbol AreaSquare meter m2m2 VolumeCubic meterm3m3 DensityKilograms/ cubic meter Kg/m 3 EnergyJoule (kg. m 2 /s 2 ) J

Organizing Data  Using tables or graphs  Data Table  Lines different variables

Organizing Data  Line Graph  Shows changes that occur in related variables  X axis  Independent variable  Y axis  Dependant Variable  Slope  ratio of change  Direct proportion  Ratio is constant between two variables  Indirect proportion  Product of the two variables is a constant

Organizing Data  Bar graphs  Compare a set of measurements or changes  Circle Graphs  Show percentages relating to a whole