Population dynamics understanding basics
- 1. Population Dynamics Class : 8 Chapter: 2 Session:1 Made by: Keneith Pereira1
- 2. What is Population • It is about where they live, how many people there are and why they live there. • It signifies the total number of people inhabiting a specific area at a particular time 2
- 3. is population fixed ? 3 No, it’s not static rather dynamic: Ever-changing
- 4. Population Dynamics • It deals with the study of how and why population change in size and structure over time 4
- 5. Distribution of Pop. in • The world pop is continuously rising and has tripled since 1950 • Mid of 2018: 59.5 % of global population was living in Asia Few Questions: • What were the reasons for this much growth rate of population? • Will the growth rate remain the same ? 5
- 6. Factors affecting the size of population The answers to all such questions are based upon: 6
- 7. Factors that affect the size of the population in the Fertility Rate or Birth Rate Death rate or mortality rate Immigration and emigration 7
- 8. eg: 16 students out of 220 answered = 7.27% response rate 8 Calculation of data/ Statistics
- 9. Fertility Rate or birth rate • Generally birth rate refers to the number of live births per 1000 person in given geographical area per year. • Some statistics(maths) applied: If the fertility rate is larger than 2 than the population shall rise as there are more children than their parents. (vice versa) 9
- 10. Mortality or Death rate o birth rate of new people increases the population, death rate decreases it. Death rate refers to number of deaths per 1000 people in an given geographical area per year. Things/factors that affect death rate: 1. Avalibility of healtcare facilities 2. Lifestyle habits 10
- 11. Immigration and Emigration Migration refers to the movement of people from one place to another because of varied reasons. 11
- 12. Emigrant and Immigrant Migration refers to the movement of people from one place to another because of varied reasons. 12
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- 14. Population change Is defined as the change in number of people during a specific time which is because of varied factors births, deaths and migration of people. Natural growth rate = Birth rate – death rate N.G.R of any country is the difference between the birth & death rate 14
- 15. Density Q. What is changing in the following 3 pictures? A: space between molecules/ no of molecules Q. What is static in the following three pictures? A: the container/ the beaker also it can be ? AREA 15 LOW average high
- 16. Density of population • Population density is the number of people for a given area. • Often given as how many people per square kilometer. • If places are densely populated, they will have a high population density • if places are sparsely populated, they will have a low population density. 16
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- 18. These countries on Map our office t 18
- 19. Density of population 19 Moderately Populated