Population. Lesson Objectives  Students will be able to describe two main reasons why the world’s population is rapidly increasing.  Students will be.

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Human Population Describe factors that affect population growth

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Presentation transcript:

Population

Lesson Objectives  Students will be able to describe two main reasons why the world’s population is rapidly increasing.  Students will be able to explain some of the problems that rapid population growth is causing.

Counting People: Population  Population is the total number of people who live in a particular place.  Geographers study population to understand where people live and why they live there.

Demography  The study of population is called demographics.  Scientists who study demographics are called demographers.

How fast is the World Growing?  The world’s population increases by about three people every second. That’s nearly 200 people a minute, 10,000 people an hour, and 240,000 people a day.

Population Data Average Family Size The average number of children in a family in a particular culture group or region. The average number of children in a family in a particular culture group or region. Birth Rate The number of babies born per year per thousand people. Death Rate The number of people who die per year per thousand people. Doubling Time The time needed for a population to increase 100 percent (double)

Life Expectancy -The average number of years people live. Population Growth Rate -How quickly a population grows each year, measured by percentage.

Population Pyramid is a bar graph that depicts a total population by breaking it down into age groups and gender. Population Density Means how close together people live in a particular place. To find population density, divide the number of people in a place by the total area of that place.

Population Pyramid: Afghanistan  How many females in your age group?  How many males?

Population Pyramid: Denmark  How many females in your age group?  How many males?

Hong Kong –one of the most densely populated places in the world.

Population Density

Largest Countries By Area (sq. miles) Russia6,592,800 Russia6,592,800 Canada3,851,809 Canada3,851,809 China3,732,396 China3,732,396 USA3,691,795 USA3,691,795 Brazil3,286,470 Brazil3,286,470 Australia2,966,136 Australia2,966,136 By Population China1.3 billion India1.2 USA314 million Indonesia237 Brazil194 Pakistan181

distribution of the world's population

distribution of the world's wealth

global CO2 emissions

Doubling  Imagine that all the years from A.D. 1 to the year A.D took place in just 24 hours. Now you have an imaginary clock to measure how fast the world’s population is growing. The list below shows that the Earth’s population doubled several times in those 24 hours. 12:00 a.m.200 million people in the world 7:48 p.m.Population doubles to 400 million 10:12 p.m.Population doubles to 800 million 11:00 p.m.Population double to 1.6 billion 11:35 p.m.Population doubles to 3.2 billion 11:59 p.m.Population will double to 6.4 billion During the 24 hours, how many times has the world’s population doubled. How long did it take for the world population to double the first time? The last time?

B.C. to 2000 World Population What was the world’s population in 1800? A.1.5 BillionB.1 Billion C.3 Billion D..5 Million

Reasons for Population Growth  Farming methods have greatly increased the world’s food supply. Green Revolution – protect crops, less water, new fertilizers, and new varieties. Green Revolution – protect crops, less water, new fertilizers, and new varieties.

Reasons for Population Growth  Scientific Advancements in Medicine and Health. Surgery Surgery Vaccines Vaccines Preventative Preventative Antibiotics Antibiotics

The Challenges of Population Growth  Using resources faster  Shortage of fresh water  Shortage of energy  Scarcity of food  Not enough money to purchase food People of India spend 80% of money on food. People of India spend 80% of money on food. United States less than 10% United States less than 10%

The Challenges of Population Growth  People can’t find jobs. Perpetual Education Fund – LDS church  Not enough schools to educate the growing number of children  Public services like transportation and sanitation are inadequate.  Deforestation – India and Pakistan Lack of trees affect the supply of clean air.

How much grain do…  Americans consume? approximately 2,000 lbs/year.  poorer people like Indians consume? approximately 400 lbs/year.  Americans consume directly (food grains)? only 150 lbs. (most is fed to livestock)  Indians consume directly (feed grains)? almost all: little can be spared for animals.

 Some countries use more than their fair share of resources  It takes 5 times as much soil, water, & fertilizer to feed a person in the U.S. than in places like India!

Urban vs. Rural  Half of the earth’s people live in cities and towns. This is called urban.  The other half live on farms or in countryside villages. This is called rural.

Urban Words  City, or metropolis – a large or important town.  Megalopolis – very big city, having cities grow into each other. Wasatch Front, New York,  Suburbs – residential districts lying just outside a city. Referred to sometimes as bedroom communities. Eagle Mtn, Ranches, Saratoga Shores? Eagle Mtn, Ranches, Saratoga Shores?