POPULATION PYRAMIDS Objectives WHAT is a population pyramid

POPULATION PYRAMIDS

Objectives § WHAT is a population pyramid? § HOW to read a population pyramid? § Recognise SHAPES of population pyramids. § IMPORTANCE of population pyramids.

What is a population pyramid? § (COPY THIS SLIDE!) § It is a diagram that gives information about the proportion of males and females in each age group. § Also shows: - proportion of young people (0 -14 ) - proportion of working people (15 – 59) - proportion of elderly people (60+)

What is a population pyramid? Vertical Axis - Age Groups Elderly dependents Working population Young dependents Horizontal Axis – Percentage / number

How to read a population pyramid? § (COPY THIS SLIDE) § Step 1 - Read the title e. g. country or city or racial group § Step 2 - Comment on general shape of the pyramid § Step 3 - Note the proportion of people in various age groups § Step 4 Note the sex ratio § Step 5 - Interpret the data

Types of Population Pyramid (COPY THIS SLIDE) 1. Triangular-shaped 2. Beehive-shaped Pyramid 3. Rectangular-shaped Pyramid

Shape of Population Pyramid (COPY THIS SLIDE) Shape of pyramids is controlled by births, l deaths, & l migrations. l

Triangular-shaped Pyramid (Broad-based Pyramid)

Beehive-shaped Pyramid

Rectangular-shaped Pyramid

(Copy this slide) Each pyramid tells a story about the past, present & future of a country & its people.

Importance of Population Pyramids § Policy Planning ~ future housing estates ~ future schools ~ future jobs § Comparison with other countries ~ developed (US) vs developing (India)

How to Draw a Population Pyramid § Step 1 - Start with 0 -10 males § Step 2 - Look at the data. On the table draw a line at that percent § Step 3 - Draw a bar and color it in § Step 4 - Do the same for the females § Step 5 - Repeat steps 1 -4 for each age group