Transcript Population growth separated by economic status Why do you think population is rapidly increasing in less developed countries and slowly increasing in.

Population growth separated by economic status
Why do you think population is rapidly increasing in
less developed countries and slowly increasing in more
developed countries?
Source: United Nations Population Division, World Population Prospects: The 2010 Revision, medium variant (2011).
Rather than viewing the following slides, all of the
subsequent interactive maps can be found at
www.prb.org
World Population in 2011
What countries are the most populous? least?
Life Expectancy
What regions of the world have the highest life expectancy? Why
do you think that is? What factors increase your life expectancy?
Births per 1,000 people
Where is the highest number of births per 1000 people?
Why do you think that is? What factors may affect how many
children a woman might have?
Poverty: % of people living on less than $2 per day
What regions of the world are the poorest? How does that
compare with the graph of the number of births per 1000 people?
What Comparisons Can You Make?
world population in 2011
life expectancy
births per 1,000 people
poverty: living on < $2 per day
Countries’ annual population growth rate in percent
as listed in the CIA World Factbook (2011 estimate)
Where is the population growing the fastest?
Where is population growing the slowest?
Are there any countries where population is decreasing?
Population Growth Rate
Population Growth Rate: Population change over time
Population growth is determined by four factors:
+ Births (B)
- Deaths (D)
+ Immigrants (I)
- Emigrants (E)
Using the formula: Population Change = (B-D) + (I-E)
What happens to the population if the growth rate is positive?
What happens to the population if the growth rate is negative?
Calculating Population Growth Rate
Population
growth
is determined
four
factors:
In the next
slide
you willbybe
calculating
the growth
rate of a fictional city
+ Births (B)
- Deaths (D)
+ Immigrants (I)
- Emigrants (E)
City Population from 2000 to 2007
City Population (# of Persons)
311,000
309,000
=
ΔY
305,000
303,000
301,000
299,000
2000
Slope
ΔX
307,000
rise
run
=
2001
ΔY
ΔX
2002
=
2003
2004
2005 2006
Year
change in population
change in time
2007
=
2008
2009
2010
306,800 – 305,600
2008 - 2007
2011
=
1200 people
1 year
The Population growth rate between 2007 and 2008 is 1200 people per year
To get the Population Growth Rate
PERCENT, divide the change in population
(1200 people) by the population at time 1
(305,6000) and multiply by 100.
1200
305, 600
x 100
=
.39 %
The population
increased by
.39% between
2007 and 2008