Demography Demography is the study of Human Populations

Population Density

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?

Place Population Area Population (km2) Density (people/km2) Very rural 50 1,000 0.05 Megacity 17,500,000 1,500 11,667 Suburbia 160,000 175 914 Rural 4,500 650 7

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.

Answer the questions using the following map.

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???

Birth Rate – the number of people born per year x 1000 population For example: BR = 390,000 x 1000 30,000,000 BR = 13 (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?

Death Rate – the number of deaths per year x 1000 population For example: BR = 210,000 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?

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?

Immigration Rate the number of immigrants per year x 1000 population For example: IR = 220,000 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?

Emigration Rate the number of emigrants per year x 1000 population For example: ER = 60,000 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?

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?

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?

Or you can simply move the decimal one spot to the left. Always express the population growth rate as a percent!! 11 X 100 = 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?

The Rule of 70 (Doubling Time) Population Growth Rate (as a percent) 70 = 63.6 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?

Example – The African country of Togo Togo has a population growth rate of 3.6% 70 = 19.4 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?

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)

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 (%) = 5.3 = 0.53% Doubling Time = 132.1 years

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)

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 (%) = 11.7 = 1.17% Doubling Time = 60 years

The end….