1. Food, Agriculture
2. Year 400: Event - Invention of the plow; Why it affected growth - Increased agricultural efficiency allowed for more food production, supporting larger populations.
3. Year 800: Event - Development of crop rotation; Why it affected growth - Improved soil fertility and yields, leading to more stable food supplies and population growth.
Year 1200: Event - Introduction of the heavy plow in Europe; Why it affected growth - Enabled farming in heavier soils, expanding arable land and increasing food output.
Year 1600: Event - Columbian Exchange; Why it affected growth - Transferred high-yield crops (like potatoes and maize) between continents, significantly boosting global food production.
4. The number of dots on the map increased over time, indicating population growth. The areas most populated in 1800 were China and India.
Parent Tip: Review the logic above to help your child master the concept of human population growth worksheet.
