Unit 3 World Population Part 1

I. Population Growth Introduction About 6.2 billion people live on Earth But they only inhabit 30 % of the land Global population is growing rapidly…close to 8 billion by 2025!

I. Population Growth B. Growth Rates Look at graph on page 91, the number of people on Earth has more than doubled between the years of 1800 & 1950!!!

Global Population is growing so rapidly??? QUESTION??? Why do you think Global Population is growing so rapidly???

Global Population is growing so rapidly because birthrates ANSWER… Global Population is growing so rapidly because birthrates have not declined as fast as death rates. What does that mean???

Death Rate vs. Birth Rate Death rate is the number of deaths per year for every 1,000 people. Birth rate is the number of births per year for every 1,000 people.

Population growth occurs at different rates in various parts of the world…why??? Over the last 200 years death rates have gone down as a result of… Improved health care More abundant food supplies Advances in technology Better living conditions However, in other places like Asia, Africa, & Latin America the birthrate is high. Families in these regions traditionally are large because… Cultural beliefs about marriage, family, & the value of children.

I. Population Growth Challenges of Population Growth Can you think of some challenges of a rapid population growth?

Examples… Difficulty of producing enough food to feed them. War and/or severe weather conditions can bring widespread famine. Resources are depleted faster...water, housing, clothing, etc. Age: the majority of some countries’ populations being infants and young children who cannot contribute to food production.

Despite these challenges, however, the levels of technology and creativity will also rise! Scientists will continue to study and develop ways to boost agriculture productivity. Fertilizers can improve crop yields. Irrigation systems can help increase the amount of land available for farming. New variety of plants such as wheat & rice have been created to withstand severe conditions and yield more food!

I. Population Growth D. Negative Population Growth This is when the annual death rate exceeds the annual birthrate. This also creates economic consequences such as finding enough workers to keep the economy going.

World Population Part 2 (population pyramids) Unit 3 World Population Part 2 (population pyramids)

World Population – 6.8 Billion United States – 310 Million POPULATION FIGURES World Population – 6.8 Billion United States – 310 Million Texas – 25 Million Houston – 4 Million

The World’s Population If we could shrink the world’s population to a village of precisely 100 people, with all existing human ratios, it would look like this: There would be 57 ASIANS, 21 EUROPEANS, 14 from NORTH and SOUTH AMERICA (combined), and 8 AFRICANS … 51 would be FEMALE; 49 would be MALE … 70 would be NON-WHITE; 30 would be WHITE … 70 would be NON-CHRISTIANS; 30 would be CHRISTIANS … 50% of the world’s wealth would be in the hands of only 6 people, and all 6 would be citizens of the United States … 80 would live in SUBSTANDARD housing … 70 would be UNABLE to READ … 50 would suffer from MALNUTRITION … 1 would be near death, while 1 would be born … Only 1 would have a college education.

Population Pyramids

A POPULATION PYRAMID is special type of bar graph that shows the population of an area divided by age and gender.

The horizontal axis of the population pyramid shows the population in actual values or in percentages.

The vertical axis (sometimes it is on the side) shows you the age groups that are represented.

Rapid growth 20

Rapid growth pyramids Have a large base to show high birth rates Amount of people decreases as the ages goes up indicating a lower standard of living Associated with developing countries like Brazil, Uganda, China 21

Slow Growth 22

Slow growth pyramids Take on a more rectangular shape Indicates population is remaining fairly steady Birth rates and death rates are similar Associated with developed countries like the UK, Germany, Canada 23

Negative growth 24

Negative growth pyramids Looks like a reverse pyramid Indicates the population of the country is decreasing Death rates are higher than birth rates Associated with developed countries like Austria, Japan, Italy 25

How to figure Population % Population of the Age __________________ Population of the Country Then turn it into a % (move the decimal over 2 spots)

World Population Part 3 (population distrubution) Unit 3 World Population Part 3 (population distrubution)

II. Population Distrubution A. Intro… Dfn: the pattern of human settlement It is related to the earth’s geography, as we have already learned that only about 30% of the Earth’s land is livable. Why is this so???

Examples High mountain peaks Barren deserts Frozen tundra Look at map

A. Intro… As you have already demonstrated on the map we did in class, you can see that almost everyone lives on a relatively small portion of the plant’s land…a little less than 1/3! Most people live where fertile soil, available water, and a climate without harsh extremes make human life sustainable.

A. Intro… Of all the continents, Europe and Asia are the most densely populated. Asia, alone, contains more than 60% of the world’s people!

B. Population Density Geographers determine how crowded a country or region is by measuring population density. Dfn: the average number of people living on a square mile/kilometer of land. Equation: Total Population of the country Total land Area

B. Population Density Varies widely from country to country. Example…. Does not account for uneven population distrubution within a country. Example…

C. Population Movement Migration- the movement of people from place to place. Example…. The resulting growth of a city populations brought about by migration and the changes that come with this increase in population are called urbanization.

Population Movement Also occurs between countries… Emigrants Immigrants Refugees