World: 7.1 Billion United States: 314 Million Texas: 26 Million Harris County: 4.1 Million Tomball: 10,800.

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Presentation transcript:

World: 7.1 Billion United States: 314 Million Texas: 26 Million Harris County: 4.1 Million Tomball: 10,800

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

World Population Graph: DatePopulationDatePopulation million Billion Million Billion MIllion Billion million20006 Billion million20509 Billion million Billion Billion

World Population Graph:

Population growth definitions: Birthrate: 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

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

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