1. Demography
Demography is the study of Human Populations

2. Population Density

3. Population density is a way of describing how crowded a place is.
Population density = number of people living in an area
size of area (in km2)
Complete the following table for these places using a calculator:
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

4. Place Population Area Population
(km2) Density (people/km2)
Very rural ,
Megacity 17,500,000 1, ,667
Suburbia 160,
Rural 4,

6. 1. Write these questions in your book.
Is Canada’s population evenly spread out across the country? Why or why not?
What is the population density for most of Canada? (low, medium, high)
Do you think Canada is a crowded country? Explain.

7. Answer the questions
using the following map.

8. Time for some geomath!
Let’s say a country has a population of 30,000,000.
Births = 390,000 immigrants = 220,000
Deaths = 210,000 emigrants = 60,000
How can we figure out how fast their population is growing???

9. Birth Rate – the number of people born per year x 1000
population
For example:
BR = , x 1000
30,000,000
BR = (this country had 13 people born per 1,000 people in that country)
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

10. Death Rate – the number of deaths per year x 1000
population
For example:
BR = , x 1000
30,000,000
DR = 7 (this country had 7 people die per 1,000 people in that country)
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

11. 13 – 7 = 6 (per 1000) Natural Increase Rate = birth rate – death rate
Example:
13 – 7 = 6 (per 1000)
This means that the natural increase rate for this country is 6 people per 1000
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

12. Immigration Rate the number of immigrants per year x 1000
population
For example:
IR = , x 1000
30,000,000
IR = 7 (this country had 7 people immigrate per 1,000 people in that country)
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

13. Emigration Rate the number of emigrants per year x 1000
population
For example:
ER = , x 1000
30,000,000
ER = 2 (this country had 2 people emigrate per 1,000 people in that country)
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

14. Net Migration Rate = Immigration Rate – Emigration Rate
Example:
7 – 2 = 5 (per 1000)
This means that the net migration rate for this country is 5 people per 1000
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

15. Population Growth Rate =
Natural Increase Rate + Net Migration Rate
Example:
6 + 5 = 11 (per 1000)
This country is growing at a rate of 11 people per 1000.
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

16. Or you can simply move the decimal one spot to the left.
Always express the population growth rate as a percent!! X = 1.1 %
1000
Or you can simply move the decimal one spot to the left.
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

17. The Rule of 70 (Doubling Time)
Population Growth Rate (as a percent)
70 = years
1.1
What this tells us is that the population of that country will double in 63.6 years.
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

18. Example – The African country of Togo
Togo has a population growth rate of 3.6%
70 = years
3.6
The population of Togo will double in under 20 years.
Review the list of responsibilities students have in a week.
Are those responsibilities reasonable or not? Why?

19. Time to practice…. A country has a population of 1,807,242.
Births = 50,250 immigrants = 13,605
Deaths = 42,658 emigrants = 11,500
Do all the calculations (just like in the example we did)

20. Answers Doubling Time = 132.1 years Birth rate = 27.8 per 1,000
Death rate = 23.6 per 1,000
Natural increase rate = 4.2 per 1,000
Immigration rate = 7.5 per 1,000
Emigration rate = 6.4 per 1,000
Net Migration rate = 1.1
Population Growth rate (%) = = %
Doubling Time = years

21. Another practice question….
A country has a population of 726,000
Births = 12,500 immigrants = 3,605
Deaths = 6,100 emigrants = 1,500
Do all the calculations (just like in the example we did)

22. Answers Doubling Time = 60 years Birth rate = 17.2 per 1,000
Death rate = 8.4 per 1,000
Natural increase rate = 8.8 per 1,000
Immigration rate = 5 per 1,000
Emigration rate = 2.1 per 1,000
Net Migration rate = 2.9
Population Growth rate (%) = = %
Doubling Time = 60 years

23. The end….