Human

Key Definitions

• **Population**: The total number of people living in a given area.
• **Population density**: The number of people per unit of land area.
• **Birth rate**: The number of live births per 1,000 population in a year.
• **Death rate**: The number of deaths per 1,000 population in a year.

Factors Affecting Population Growth

• Fertility rates
• Mortality rates
• Migration (immigration and emigration)

Exam Tips

• Understand how population pyramids reflect population structure.
• Analyze the causes and effects of population change over time.