4. continuation
Words to know in the chapter:
Migration-movement of people from
one place to another.
Immigration-Moving into to live) an
area or country.
5. Continuation
Natural Change-net change in total
population of an area due to the balance of
birth rates and the death rates.
Migration Change-Net change in the total
of a population at an area due to migration.
Emigration-moving out of an area or
country to live in a new one.
6. Dynamics of Population Growth
Births, and Deaths have effect on the
growth and decline of a population.
There are 3 forces representing a
balance in any population on the earth
surface. Referred to as the population
dynamics.
7. Population Dynamics
oCrude Birth Rate-which is the
number of births over a period of
time divided by an average
population.
oCrude Death Rate-Is the number
of deaths per unit of time divided
by the average of population.
8. continuation
Crude Growth Rate- Describes the
difference between the number of births
and the deaths per units of time.
They are referred to as Crude because they
fail to take into account the factors such as
Age and Gender of the members of the
population.
10. Picture Analysis
Having studied the pictures above you did
get an understanding of how each factor
contributes in keeping the population in a
balance state. Now let us discuss step by
step.
To make it more simple we take the whole
box as a area (community)with its total
population (residence).
11. Continuation
The box is divided into 2 parts the
natural(left side) and migration
(right side), which are changes that
occur in a community and affect the
population.
There are incoming arrows showing
births and
12. continuation
immigrants, they show an inflow in
the population which results in
population increase in the community.
The out going arrows above death and
emigrants indicate an outflow in the
population which leads to a decrease in
the population of the community.
13. Why we experience these changes in
population (community)?
Immigration-could occur because the
area has enough food and security than
other area.
Birth- Parents can afford the baby, or
people do not have access to family
planning.
14. Continuation
Death-Natural causes like aging, or poor
services and equipments in hospitals.
Emigration-occurs when there is lack of
resources, food in an area, might due to over
population. People live the place to a more
resourced area.
17. Class Discussion
o Having looked at the pictures above .
o Tell me which areas would you
like/prefer to live in.
o Discuss what you think is happening to
the population in each of the
communities.
o Name factors/changes that you think
are affecting each communities.
18. Reference
1.Focus on Geography by G. Keats – 2007
2. Middle School Geography Curt L. Anderson, Bonnie
T. Meszaros, Mary Lynn Reiser – 2004
3. Introduction to Population by Dick Neal – 2003
