Cheatsheet Content
### Population Distribution - **Definition:** The way people are spread across the Earth's surface. - **Uneven Distribution:** More than 90% of the world's population lives in about 10% of the land area. - **Densely Populated Areas:** River valleys, fertile plains (e.g., Ganga plains, Nile valley). - **Sparsely Populated Areas:** High mountains, deserts, equatorial forests. - **Factors Affecting Distribution:** - **Geographical Factors:** - **Topography:** Plains preferred over mountains/plateaus. - **Water:** Areas with fresh water preferred. - **Climate:** Moderate climates preferred over extreme hot/cold. - **Soil:** Fertile soils for agriculture attract people. - **Social, Cultural & Economic Factors:** - **Social:** Better housing, education, health facilities. - **Cultural:** Places with religious or cultural significance. - **Economic:** Industrial areas offer employment opportunities. ### Population Change - **Definition:** The change in the number of people during a specific time. - **Key Factors:** - **Birth Rate:** Number of live births per 1,000 people. - **Death Rate:** Number of deaths per 1,000 people. - **Migration:** Movement of people from one place to another. - **Immigrants:** People arriving in a new country. - **Emigrants:** People leaving a country. - **Natural Growth Rate:** Difference between birth rate and death rate. - **Population Explosion:** Rapid increase in population due to high birth rates and declining death rates (improved food supply, medicine). ### Population Composition - **Definition:** The structure of the population, including age, sex, literacy level, occupation, income, and health conditions. - **Population Pyramid (Age-Sex Pyramid):** - A graphical representation showing the age and sex composition of a population. - **Base:** Represents younger age groups (birth rates). - **Top:** Represents older age groups (death rates). - **Shape:** Indicates population characteristics: - **Broad Base:** High birth rates, young population. - **Narrow Base:** Low birth rates, aging population. - **Tapering Top:** High death rates among older people. - **Significance:** Helps understand the number of dependents (young and old) vs. working-age population. ### Human Resources - **Definition:** People are considered a resource because they can make the best use of nature to create more resources when they have the knowledge, skill, and technology to do so. - **Importance:** Healthy, educated, and motivated people develop resources as per their requirements. - **Government Role:** Governments play a key role in developing human resources by providing education, healthcare, and training.
