8.3 Population structure Flashcards

1
Q

A population pyramid

A

a diagram that shows the proportion of the population that is male and female in different age groups

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2
Q

types of population structures

A
  • expanding (HIGH BR & DR) pyramid shape
  • stationary (HIGH BR, economically active, LOW DR)
  • declining (LOW BR & LOW DR, old dependant population)
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3
Q

Young Dependents:

A

The number or the percentage of the population under the age of 16.

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4
Q

Old Dependents:

A

The number or the percentage of the population over the age of 65.

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5
Q

economically Active:

A

People between the ages of 16 and 65. This is basically the working group, are independant

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6
Q

If a pyramid has a wide base it
indicates ________

A

high birth rates

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7
Q

If there are a lot of old dependents it indicates

A

high life expectancy

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8
Q

less economically developed country (LEDC) population pyramid

A
  • expanding population
  • wide base–>high birth rate
  • narrow top –>high death rate
  • short life expectancy
  • more young dependant than old dependant
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9
Q

more economically developed country (MEDC) population pyramid

A
  • narrow base–> low birth rate
  • broad shape at top–> high life expectancy
  • high econmically active population
  • straight/ rectangle shape
  • elderly dependents
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10
Q

ad and dis of youthful population

A

ad-
* large and cheap future workforce
* large tax base for the country

dis-
* increases pension costs
* puts strain on education and health services
* lack of available jobs
* puts strain on available accommodation

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11
Q

sudden change in population

A

wars
diseases
mass migration
natural disaster

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