Geography Paper 3

• Graph types:

  1. Radial graph
  2. Population pyramids
  3. Scatter graphs
  4. Bar graphs
  5. Line graphs
  6. Choropleth map
  7. Isoline graph
• Radial graph - Used to show data with numerous variables.

  Strength: Show several data sets at once

  Weakness: Hard to spot anomalies
• Population pyramids - Used to show number of people in a population

  Strength: Clear to see population structure

  Weakness: Only shows age and gender, nothing else
• Scatter graphs - Used to plot 2 sets of data to identify relationships

  Strength: Easy to see correlation or not

  Weakness: Only shows relationship between 2 variables
• Bar graphs - Size of bar is proportional to the value of the variable

  Strength: Easy to see data represented

  Weakness: Can only use discrete data
• Line graphs - Used to show general patterns of changes over time

  Strength: Easy to compare more than one data set

  Weakness: Can only be used with continuous data
• Choropleth map - A shaded map used to show different values in areas

  Strength: Easy to see clear patterns

  Weakness: Suggests everything within an area is the same
• Isoline map - A map which links places of equal value E.G. contours 


  Strength: useful to interpret general trends

  Weakness: Can be subjective depending on data