Demographic Concepts and Definitions

Birth Rate and Death Rate

• Birth Rate
    - Definition: The number of births per a thousand people per year.
    - Significance: Indicates population growth and reproductive health within a society.

• Death Rate
    - Definition: The number of deaths per a thousand people per year.
    - Significance: Indicates mortality trends and health outcomes within a population.

Natural Increase

• Natural Increase
    - Definition: The difference between birth rate and death rate.
    - Calculation:
      - Natural Increase = Birth Rate - Death Rate
    - Implication:
      - Population is growing if the birth rate is higher than the death rate.
      - An indicator of a demographic transition in society.

Population Density

• Population Density
    - Definition: The number of people living per square kilometer.
    - Importance: Reflects how crowded an area is and can have implications on resources and infrastructure.

• Population Distribution
    - Definition: How people are spread out over an area.
    - Factors Influencing Distribution:
      - Geography, climate, economic opportunities, and social factors.

Rapid Population Changes

• Population Explosion
    - Definition: A rapid increase in population size within a short period.
    - Causes:
      - High birth rates and improvements in medical care and sanitation.

Migration Factors

• Push Factor
    - Definition: Factors that drive people away from their current location.
    - Examples:
      - New jobs, war, poor climate conditions.

• Pull Factor
    - Definition: Factors that attract people to a new area.
    - Examples:
      - Good climates, job opportunities, educational institutions.

Population Descriptions

• Densely Populated
    - Definition: Areas where a lot of people live per square kilometer.
    - Implications: Higher demand for housing, transportation, and services.

• Sparsely Populated
    - Definition: Areas with few people living per square kilometer.
    - Implications: More land available, potentially less competition for resources, but may face challenges in service provision.