Population structures.

Question 1

Dependency ratio.

Answer 1

Shows the relationship between the economically active population and the non-economically active population.

Question 2

Support ratio.

Answer 2

This is the inverse of the dependency ratio.

Question 3

Juvenility index.

Answer 3

This shows the proportion of the dependency ratio.

Question 4

Old-age index.

Answer 4

This shows the proportion of elderly people in a population.

Question 5

Pyramids show….

Answer 5

• The results of births minus deaths in specific age groups.
• The effects of migration (if regional or local scale).
• The effects of events such as war, famine and disease (possibly).
• An indication of the overall life expectancy of a country.

Question 6

Stage 1 (high fluctuating).

Answer 6

• Birth rate is high so a wide base.
• Death rate is high so concave sides.
• Life expectancy is low so a short pyramid.

Question 7

Stage 2 (early expanding).

Answer 7

• Birth rate is still high so a wide base.
• Death rate is falling, so sides become more triangular and fill out.
• Life expectancy is slightly higher so the pyramid is a bit taller.

Question 8

Stage 3 (late expanding).

Answer 8

• The birth rate begins to fall, so the base is narrower.

* Death rates, including Infant mortality rates, continue to fall so the sides are more convex.

Question 9

Stage 4 (low fluctuating).

Answer 9

• Birth rates are low so the base is narrow.
• Death rates are low so the sides are more convex or vertical.
• Life expectancy is higher so the pyramid is taller.
• There is a more balanced age structure.

Question 10

Stage 5 (decline).

Answer 10

•As above, but the pyramid may now wider at the top and taller indicating an Ageing population structure and longer life expectancy.