1. Population Growth Rates Density Trends
10/16/2017 3:36 PM
Population Growth Rates Density Trends
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2. Population World: United States: Texas: Harris County: Tomball:
7.1 Billion
United States:
330 Million
Texas:
26 Million
Harris County:
4.1 Million
Tomball:
10,800

3. Population Trends: World Population Growth 1700s – Present
Industrial Revolution led to population explosion
(better technologies = more food / better healthcare)
Urbanization begins
movement to urban (cities) areas from rural (countryside) areas
U.S. Movement
1840s – 1850s
California Gold Rush – causes U.S. population to move west
Westward Expansion – Manifest Destiny
1950s - Present
New technologies (air conditioning, etc.) cause population to move south
Population increases in TX, FL and most southern states

4. Population World Population Graph: Date Population 1500 450 million
1850
1.2 Billion
1550
462 Million
1900
1.6 Billion
1600
481 MIllion
1950
2.55 Billion
1650
500 million
2000
6 Billion
1700
600 million
2050
9 Billion
1750
700 million
2100
11 Billion
1800
1 Billion

5. Population
World Population Graph:

6. Population Population growth definitions: Birthrate: Death Rate:
number of live births each year per 1,000 people
Death Rate:
number of deaths each year per 1,000 people
Immigration:
number of people who move into a country
Emigration:
Number of people who move out of a country

7. Population Population growth formulas: World Population Growth:
World Birthrate - World Death Rate
Growth Rate of a Country:
(Country Birthrate + Immigration) – (Country Death Rate + Emigration)
Population Density Formula:
Population / Land Area