Other slides in this set

Slide 2

Preview of page 2

Here's a taster:

Progressive Type
· It has a wide base that quickly narrows upwards to
a point.
· It indicates a large birth rate, but poor conditions
mean people rapidly die off, hence the triangular
shape of the structure. The population is increasing.
Hemal BharadvaTM…read more

Slide 3

Preview of page 3

Here's a taster:

Stationery Type
· The shape of this structure is more "square." All
age groups are well represented.
· It indicates that the birth rate is moderate, and few
people die off as they get older. The population is
stagnant.
Hemal BharadvaTM…read more

Slide 4

Preview of page 4

Here's a taster:

Regressive Type
· The structure has a fairly wide top with a bulging
middle and narrow base.
· The birth rate is low, hence the low base, and there
are more adults than children. The population is
decreasing.
Hemal BharadvaTM…read more

Slide 5

Preview of page 5

Here's a taster:

The Dependency Ratio
· This is the ratio between the non-working
population (children and aged) and the workers
(adults).
· It is lowest in regressive populations and highest in
progressive populations.
· It is calculated using the formula (children + aged)
/Adults) * 100
· In developed countries, the DRs range from 50-70.
In most developing countries the DRs are over 100
Hemal BharadvaTM…read more

Slide 6

Preview of page 6

Here's a taster:

The Old Age Index
· This is the proportion of aged to adults.
· It is calculated using the formula: (aged)/(adults) *
100
Hemal BharadvaTM…read more

Slide 7

Preview of page 7
Preview of page 7

Slide 8

Preview of page 8
Preview of page 8

Slide 9

Preview of page 9
Preview of page 9

Slide 10

Preview of page 10
Preview of page 10

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all resources »