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Population Density

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... and put them inside the lines of your United States map. ... Look at a population map of China and the United States. Is the population spread out evenly? ... – PowerPoint PPT presentation

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Title: Population Density


1
Population Density
Exploring the relationship between population and
land area
2
Population in 2005
  • The population of the world by the end of 2005
    will be approximately 6,464,750,000 people.
  • The population density of the world in 2005 is 48
    people per square kilometer.

3
Population in 2050
  • How old will you be in 2050?
  • Do you think you will havechildren of your own
    in 2050?
  • The projected population of the world in 2050 is
    9,075,903,000.
  • The projected population density is 67 people
    per square kilometer.

4
Population in Theory
2005
2050
  • If each of these boxes represent 1 square
    kilometer and each black dot represents a person,
    this is what the worlds population density would
    look like in 2005 and 2050.

5
Population in Reality
2005
2050
  • In reality, the population density much more
    dense in some places than others. Urban areas are
    more dense than rural areas, and some countries
    are more dense than others.

6
Purpose
  • This exercise helps students compare the relative
    population density of different countries and
    examine its effects.

7
The World
  • The total population of the world is
  • Approximately 6,326,005,560 people
  • The total land area of the world is
  • Approximately 510,072,000 sq km

8
World Population
  • The three most populous countries are
  • China - 1,273,111,290 people
  • India - 1,029,991,145 people
  • United States - 278,058,881 people
  • Their land areas are
  • China - 9,326,410 sq km
  • India 2,973,190 sq km
  • United States - 9,158,960 sq km

9
Lets Round the Numbers
  • Take these numbers and round them to the nearest
    hundred million.
  • China - 1,273,111,290

1,300,000,000
Hundred million place
1,000,000,000
India - 1,029,991,145
Hundred million place
300,000,000
United States - 278,058,881
Hundred million place
10
More Rounding!
  • Then round these numbers to the nearest million.
  • China - 9,326,410 sq km

9,000,000 sq km
Millions place
India 2,973,190 sq km
3,000,000 sq km
Millions place
United States - 9,158,960 sq km
9,000,000 sq km
Millions place
11
Land Resources in China and the U.S.
  • Take your rounded numbers for the areas of China
    and the United States and find the ratio of land
    area between China and the United States.
  • Do the figures you calculated seem to match the
    relative sizes of the countries on the two maps?

12
Population in China and the U.S.
  • What is the ratio of people in China to people in
    the United States?

13
Population in China and the U.S.
  • Take the candies and separate them into groups
    representing the ratio of people in China and the
    U.S.
  • It is easy to do this by taking the ratio and
    count that number for each pile until they are
    all gone.
  • For example If the ratio was 21, you would put
    2 in the first pile and then 1 in the second pile
    over and over until they are all gone.

14
How many people per candy?
  • Now count the number of candies that you have in
    the China pile. How many people are represented
    by each candy?
  • Example if you have 50 candies in the China pile
    and there are 1,300,000,000 people in China then

2
6
,000,000
50
1,300,000,000
-10 300
This means with 50 candies each candy represents
26,000,000 people.
-300 0
  • Now you can do the same with the United States
    numbers!

15
Putting It All Together
  • Now take the candies that are for China and put
    them inside the lines on your map.
  • Then take the United States candies and put them
    inside the lines of your United States map.

16
Discussion
  • Which country has more space per person?
  • How do you think this would change a persons
    experience living in that country?
  • Look at a population map of China and the United
    States. Is the population spread out evenly? Why
    or why not?

17
Maps
18
China
19
United States
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