POPULATION

1
POPULATION

• DISTRIBUTION
• DENSITY
• Need to be able to
• 1.Define the terms.
• 2.Describe distribution/density _at_ differing
  scales.
• 3.Explain distribution/density _at_ differing
  scales,referring to
• PHYSICAL/HUMAN factors affecting them.
• 4.Draw and interpret LORENZ CURVES.
• 5.Identify ways of maping distribution/density
  (Dot and Choropleth Maps)
• 6.Reinforce understanding via CASE STUDIES _at_
  different scales.

2
DISTRIBUTION

• Where people live.
• SPATIAL arrangement of people across the earth.
• Describes the way people are LOCATED within an
  area.When plotted ion a map this can reveal areas
  of high/low populations
• (which maps of population DENSITY do not
  show)
• Can be shown by means of DOT MAP.

3
Density

• The number of people per unit area (eg,per sq
  km)
• Found by dividing the total population of a
  country
• (or any region) by the total area of that
  country
• (or region)
• IT CAN BE MISLEADING
• Because it averages out density across an
  area-it does
• not show very accurately the variations in
  density within
• an area.Often CHOROPLETH MAPS used to show it.

4
LORENZ CURVE (SKILL)

• A graph indicating the degree of uneveness
  (distribution) of population.
• Both axis show cumulative .
• A diagonal line added to show perfectly even
  population distribution can then be used to help
  show the degree,or otherwise,of uneven population
  distribution.
• It can also be used to show the uneven
  distribution,or otherwise,of inequality in a
  society.

5
LORENZ CURVE TASKS(SKILL)
6
FACTORS AFECTING POPULATION DISTRIBUTION AND
DENSITY

• Beware of oversimplification.A combination of
  factors are responsible.
• They may be
• CULTURAL
• PHYSICAL
• HUMAN

7
PHYSICAL/ENVIRONMENTAL

• Initially settlements occupied a supportive
  environment
• water supply
• fertile soil
• woodland-fuel (raw material)
• above floodplain level of flooding
• suitable growing season (climate/crops/raw
  material)
• egHEARTHS of settlement in Mesopotamia
• 
  N India
• 
  NW Europe
• BUT ALL LINKED TO PEOPLES ABILITIES TO
  SURVIVE
• egtools used (plough/use of iron)
• building materials
• raw materials

8
PHYSICAL/ENVIRONMENTAL

• Access to the SEA.
• Low ALTITUDE locations.
• WATER availability.
• Appropriate CLIMATE / VEGETATION.
• Appropriate SOILS.
• Access to RAW MATERIALS.
• EACH OF ABOVE LINKED TO
• PEOPLES ABILITIES TO EXPLOIT
• AND DEVELOP THE ENVIRONMENT.
• ( linked to their Human/Cultural abilities)

9
HUMAN /CULTURAL

• Technological changes.
• Social changes.
• Economic developments
• Political factors.
• ALL LINKED TO ENVIRONMENTAL/
• PHYSICAL FACTORS APPLYING
• AT THE TIME.

10
REVIEW

• Distribution
• Density
• Dot/Choropleth Maps used to..Advantages/Disadvan
  tages
• Lorenz Curve used to show..Advantages/Disadvant
  ages
• TERMS
• LEDC/W
• MEDC/W
• PHYSICAL
• HUMAN
• CULTURAL
• POLITICAL
• ECONOMIC
• ENVIRONMENTAL

11
REVIEW OF COMMANDWORDS

• Identify
• Describe
• Explain
• Examine
• State
• Give reasons
• Suggest
• Outline

12
EXAM QUESTIONSessay-style

• 1.Identify and explain the features which lead to
  large areas of the world having a very low
  density of population.(10)
• 2.Explain the relative importance of
  physical and human factors in determining
  variations in population density within one
  country or region(10).
• 2002

13
EXAM QUESTIONSstructured questions

• Describe patterns
• Suggest reasons for distribution of
• (2002)
• Complete the population distribution map.
• Describe the distribution (of wards) you can see.
• (2003)

14
KEY SKILLS REVIEW

• Communication
• Evidence of discussion?
• presentation to?
• synthesizing information?
• writing for different
  audiences?
• Number
• Evidence of planning/interpreting from data?
• multi-stage calculations?
• justifying choice/advantages/d
  isadvantages of data?
• I T
• Evidence of planning by/using IT for different
  purposes?
• explaining/describing/exchangin
  g information by IT?
• presentation using IT?