Population dynamics：练习题

Which factor is a primary reason for the rapid increase in the world's population during the 20th century?

A country has an aging population and is implementing pro-natalist policies. Which set of conditions most likely describes this country's demographic situation?

In a country experiencing over-population, what is the most likely long-term effect on the natural environment?

In many countries, a high infant mortality rate is a significant factor affecting population growth. Which of the following is the most likely social consequence for a family in a country with a high infant mortality rate?

A government is concerned about a declining population and an aging workforce. Which of the following sets of population policies would be most appropriate to address these concerns?

A country has experienced a consistent decrease in its death rate while the birth rate remains high. Identify the likely effect on the country's total population size.

Explain how a high prevalence of HIV/AIDS can impact the death rate and the overall population structure of a country.

Compare the likely causes of low life expectancy in a country heavily affected by HIV/AIDS with one experiencing widespread food shortages.

(a) Define the term natural increase.
(b) If a country has a birth rate of \(22\) per \(1000\) and a death rate of \(9\) per \(1000\), calculate the annual rate of natural increase as a percentage. Show your working.

(a) Define the term over-population.
(b) Explain how a country with a large population size can avoid being classified as over-populated by making effective use of its resources.
(c) Suggest three consequences of over-population on the natural environment of a country.