Question

Describe what is population growth and the factors affecting it. How do we express the population growth of a country?

Answer 1

Instructions:

• Describe population growth.
• Describe the factors affecting population growth.
• Explain how we can express population growth.

Solution:

• Population growth is the change in the number of inhabitants of a country or a territory during a specific period of time.
• Factors affecting population growth:
  • Birth rate
  • Death rate
  • migration
• Birth rate

The birth rate refers to the number of live births per 1000 persons in a year.

• Death rate

The death rate refers to the number of deaths per 1000 persons in a year.

• Migration

The movement of people across regions and territories. It impacts the population number and distribution of the population.

• Internal migration
  • Within the country
  • No change in the country’s population
  • Population distribution varies
• International migration
  • From one country to another
  • Changes the country’s population
  • Population distribution varies
• There are two ways of expressing population change:
  • Absolute change
  • and Percentage change
• Absolute change

The absolute increase is the magnitude of the increase in population for a defined period.

• Population change (absolute numbers) = (population at later date) – (population at earlier date)
• Population change in a place = (number of births + number of in-migrants) – (number of deaths + number of out-migrants).
• Percentage change

The amount of increase for every 100 people in the base population is called a percentage change in population.