1. Growth and Changing Needs

2. Measuring Growth Rate Helpful for scientists, urban planners and others who have to anticipate the future population Helpful for scientists, urban planners and others who have to anticipate the future population Determined by subtracting Death rate (number of deaths per 1000 people from the birth rate (number of births per 1000 people Determined by subtracting Death rate (number of deaths per 1000 people from the birth rate (number of births per 1000 people

4. Measure the Growth Rate of the following: Birth rate= 29 births/1000 people Birth rate= 29 births/1000 people Death rate= 8 deaths/1000 people Death rate= 8 deaths/1000 people 29 – 8= 21 The population grew at a rate of 21 persons per year per 1000 people OR 2.1%

6. Doubling Time How long it will take a particular population to double its size How long it will take a particular population to double its size Illustrates negative potential of uncontrolled population growth Illustrates negative potential of uncontrolled population growth –Double housing, food supplies, jobs, education, water, energy, health facilities –Try to maintain or improve standard of living

7. Factors that determine growth rate Birth and death rate Birth and death rate Immigration- people moving into an area Immigration- people moving into an area Emigration- people moving out of an area Emigration- people moving out of an area * Immigration and emigration only factor in when studying population of a specific area (city, nation), not the worldwide popoulation.

8. Demography Does not only look at numbers but also the types of people that make up a certain population Does not only look at numbers but also the types of people that make up a certain population Can determine how the populations changing- older, richer, better educated? Can determine how the populations changing- older, richer, better educated? Can help make plans to accommodate the future needs of society Can help make plans to accommodate the future needs of society –Child care, care for the elderly

9. Which one has a faster growth rate? How can you tell?

10. Changing Needs Technology Technology Lifestyles Lifestyles Standards of living Standards of living All of these change consumption rates of a population Ex: energy use- increased use due to industrialization and modernization

12. 1. Why is knowing the rate of population growth important? 2. Who might use this information? 3. How are population growths determined? 4. What is meant by the doubling time of a population? 5. Other than birth and death rates, what other factors can affect the doubling time of a population? 6. What is demography? 7. Why do you think industrialized nations generally use more resources than developing nations?