Human Population Dynamics A review of the CAPT Embedded Task GHS revised Greewich PPT

World Population Growth 1750-2000 (in millions)

Human Population Growth Although the human population as a whole is growing at an amazing rate, different populations of people are growing at different rates. We can compare different countries to see these differences.

In this activity we will compare three different countries… United States Afghanistan Italy

Population Pyramids To the right is a population pyramid based on a make-believe population. To compare different countries populations, we can use a population pyramid.

Population Pyramids can… Compare males vs. females in a population Compare different age groups in a population

Let’s review... What is the most populated age group in this population? 2. Predict what age group will be the most populated in 15 years. About how many children (what %) in this population are under the age of 5? How many are female?

Let’s review... What is the most populated age group in this population? The most populated age group is those between 20 and 24 years in age. Predict what age group will be the most populated in 15 years. Assuming that there is not a major growth period in this population in the next 15 years, the group that is currently 20-24 years old will be in the 35-39 age group.

Let’s review... About how many children in this population are under the age of 5? Approximately 12.5% of the population is 0-4 years old. How many of them are female? Looking on the left side of the pyramid in the 0-4 age bracket, about 6% of those under age 5 are female.

So back to our previous question. How do these three countries compare? United States Afganistan Italy

U.S. vs. Afghanistan Afghanistan United States

Now, let’s compare countries again… Rapid vs Slow Growth What do you notice about the populations from these countries? Do you notice that Afghanistan has more people in the lower age brackets? The U.S. has more people in the middle age bracket. Which do you think represents Rapid Growth? Slow?

RAPID GROWTH “Pyramid”

RAPID GROWTH Underdeveloped or developing countries Wide base, narrow top = young population High Birth Rates

SLOW GROWTH “Boxy” “Pear Shaped” “Middle Bulge”

SLOW GROWTH Developed Countries # young is less than # of middle aged Wide center portion “pear shaped”

Now, let’s compare countries again… Based on these graphs, what is one issue that each country will have to face in the future??

Now, let’s compare countries again… Based on these graphs, what is one issue that each country will have to face in the future?? Afghanistan: Afghanistan is clearly a growing country. It has proportionally many more younger people. The country will have to supply more and more resources like food and energy for its growing population.

Now, let’s compare countries again… Based on these graphs, what is one issue that each country will have to face in the future?? U.S.: The U.S. is a stabilized population with little growth. It will have an aging middle class in years to come. Because the average age in the U.S. continues to rise, it may have a difficult time supporting its large number of aging citizens.

Now lets look at Italy… To the right is a population pyramid from the year 2000 and a projected (predicted) pyramid for the year 2025. How does Italy differ from the first two countries? What is expected to happen it Italy in the next 16 years?

Now lets look at Italy… To the right is a population pyramid from the year 2000 and a projected (predicted) pyramid for the year 2025. How does Italy differ from the first two countries? Italy is a country who’s population is on a decline. What is expected to happen it Italy in the next 16 years? The number of young people in Italy is expected to continue to decrease over the next decade.

NEGATIVE GROWTH

NEGATIVE GROWTH Death Rate Exceeds the Birth Rate Middle Age Migration/Job Opportunities

What are some issues that Italians face in the future? Now lets look at Italy… What are some issues that Italians face in the future?

What are some issues that Italians face in the future? Now lets look at Italy… What are some issues that Italians face in the future? Italians face a declining population. That means a smaller work force and a shrinking population of the Italian culture and heritage.

Summary… test yourself To the right is a comparison of France and Kenya. Answer the following questions: 1. What is a potential concern for each country for the future? 2. What is a major difference between the two populations in terms of life expectancy? Predict why. 3. Label each country as “A growing country” or “A stable/declining country”. 4. One country is growing exponentially. Which one?

Summary… answers FRANCE What is a potential concern for each country for the future? France is a stabilized population with little growth. It will have an aging middle class in years to come. Because the average age in France continues to rise, how will the population support its large number of aging citizens? What is a major difference between the two populations in terms of life expectancy? France has many more people growing into their 80’s and even 90’s compared to Kenya. This may be because France has better health care for the sick and elderly. 3. Label each country as “A growing country” or “A stable/declining country”. This country has a stable/declining population. One country is growing exponentially. Which one? (Not this one.)

Summary… answers KENYA What is a potential concern for each country for the future? Kenya clearly is a growing country. It has proportionally many more younger people than France. The country will have to supply more and more resources like food and energy for its growing population. What is a major difference between the two populations in terms of life expectancy? Kenya has many fewer people growing into their 70’s and even 80’s compared to France. This may be because Kenya has poorer health care and fewer nursing programs for the elderly. 3. Label each country as “A growing country” or “A stable/declining country”. This country has a growing population. One country is growing exponentially. Which one? Kenya is definitely growing exponentially.

Human Population Pyramid: Make your own and analyze your data Be prepared to discuss your answers Open Note Quiz on Population Next Class Begin Population Pyramids Lab

You can research population pyramids, and other info having to do with population for any country worldwide. Visit the website below: http://www.census.gov/ipc/www/idb/