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# Population dynamics.g.p mhlawuli

Published on: Mar 4, 2016
Published in: Technology      News & Politics

#### Transcripts - Population dynamics.g.p mhlawuli

• 1. LESSON NUMBER 7BYG.P MHLAWULI17 APRIL 2013Geography Grade 11
• 2. PopulationDynamics
• 3. PopulationIt refers to the collection ofindividuals in an area.
• 4. continuationWords to know in the chapter:Migration-movement of people fromone place to another.Immigration-Moving into to live) anarea or country.
• 5. ContinuationNatural Change-net change in totalpopulation of an area due to the balance ofbirth rates and the death rates.Migration Change-Net change in the totalof a population at an area due to migration.Emigration-moving out of an area orcountry to live in a new one.
• 6. Dynamics of Population Growth Births, and Deaths have effect on thegrowth and decline of a population.There are 3 forces representing abalance in any population on the earthsurface. Referred to as the populationdynamics.
• 7. Population DynamicsoCrude Birth Rate-which is thenumber of births over a period oftime divided by an averagepopulation.oCrude Death Rate-Is the numberof deaths per unit of time dividedby the average of population.
• 8. continuation Crude Growth Rate- Describes thedifference between the number of birthsand the deaths per units of time. They are referred to as Crude because theyfail to take into account the factors such asAge and Gender of the members of thepopulation.
• 9. Diagram illustrating how the dynamics relateto keep a balance in an area.
• 10. Picture Analysis Having studied the pictures above you didget an understanding of how each factorcontributes in keeping the population in abalance state. Now let us discuss step bystep.To make it more simple we take the wholebox as a area (community)with its totalpopulation (residence).
• 11. ContinuationThe box is divided into 2 parts thenatural(left side) and migration(right side), which are changes thatoccur in a community and affect thepopulation.There are incoming arrows showingbirths and
• 12. continuation immigrants, they show an inflow inthe population which results inpopulation increase in the community.The out going arrows above death andemigrants indicate an outflow in thepopulation which leads to a decrease inthe population of the community.
• 13. Why we experience these changes inpopulation (community)?Immigration-could occur because thearea has enough food and security thanother area.Birth- Parents can afford the baby, orpeople do not have access to familyplanning.
• 14. ContinuationDeath-Natural causes like aging, or poorservices and equipments in hospitals.Emigration-occurs when there is lack ofresources, food in an area, might due to overpopulation. People live the place to a moreresourced area.
• 15. Study the pictures below (what comes tomind?)
• 16. Class Discussiono Having looked at the pictures above .o Tell me which areas would youlike/prefer to live in.o Discuss what you think is happening tothe population in each of thecommunities.o Name factors/changes that you thinkare affecting each communities.
• 17. Reference1.Focus on Geography by G. Keats – 20072. Middle School Geography Curt L. Anderson, BonnieT. Meszaros, Mary Lynn Reiser – 20043. Introduction to Population by Dick Neal – 2003