Chapter 5: Applications of Measurement Notes

Units and rates, measurement error and limits of accuracy, significant figures, areas of real shapes, surface area, volume and capacity, and the energy we pay for in kWh and eat in kJ.

Sections

  1. 5A Units, rates and conversions Mastered

    Metric units and prefixes, converting length, area, volume and mass, hectares and millilitres, speed and other rates, and using ratios and map scales.

  2. 5B Measurement error and limits of accuracy Mastered

    Precision of an instrument, absolute error, upper and lower limits of accuracy, percentage error, sources of error, and how errors grow when measurements are used in calculations.

  3. 5C Significant figures and scientific notation Mastered

    Which digits are significant, rounding to significant figures, writing very large and very small numbers in scientific notation, and calculating with them on a calculator.

  4. 5D Area of real shapes and the trapezoidal rule Mastered

    Areas and perimeters of sectors and annuluses, composite shapes made by adding and subtracting, and the trapezoidal rule for estimating the area of irregular land.

  5. 5E Surface area, volume and capacity Mastered

    Surface area and volume of prisms, cylinders, pyramids, cones and spheres, composite solids, open containers, and converting volume to capacity in litres.

  6. 5F Energy at home and in food Mastered

    Power in watts, energy in kilowatt-hours, the running cost of appliances, energy rating labels, and food energy in kilojoules and Calories.

Formula sheet