Population
important facts, models, and vocab
Demography is the study of population.
By late 2011, the world population passed 7 billion.
Geographers ask three questions when studying population distribution
Neo-Malthusians support Malthus's theory and agree that the increased demand for food will lead to a decrease in population growth. On the other hand, anti-Malthusians disagree with Thomas Malthus's theory and agree that an increased demand for food will lead to better technology and stable food production.
People are unevely distributed around the world. People are leaving rural areas and clustering in cities and towns.
By late 2011, the world population passed 7 billion.
Geographers ask three questions when studying population distribution
- Where are people found?
- What places are growing and how fast?
- Why are population rates different in different places?
Neo-Malthusians support Malthus's theory and agree that the increased demand for food will lead to a decrease in population growth. On the other hand, anti-Malthusians disagree with Thomas Malthus's theory and agree that an increased demand for food will lead to better technology and stable food production.
People are unevely distributed around the world. People are leaving rural areas and clustering in cities and towns.
- Population density is the number of people that live in a given area of land.
- Arithmetic density is the total number of people divided by the total number of land area.
- Physiological population density is the number of people per area of arable land.
- Overpopulation is when the population exceeds the carrying capacity. Carrying capacity is the largest number of people an environment can support.
- Sustainability is how well a country can provide it's citizens with the proper needs.
![Picture](/uploads/2/5/1/7/25170109/8689688.gif?469)
A population pyramid is a model used to show the age and sex distribution of a particular population. Population pyramids are affected by level of health care, impact of war, birth control, cultural values, gender issues, and level of development.
Population clusters
A population cluster is an area where a large population settles and where many people migrate to.
A cencus is sent out every ten years to officially get statistics about a country's population.
A population cluster is an area where a large population settles and where many people migrate to.
- About 1/5 of all humans live in East Asia.
- About 1/5 of humans in South Asia
- 2/3 of the world's populatio is located in East Asia, South Asia, Southeast Asia, and Western Europe.
A cencus is sent out every ten years to officially get statistics about a country's population.
The demographic transition model(DTM) is a series of demographic changes in which a country moves through stages of high birth and death rates to low birth and death rates through time.
- Crude birth rate(CBR): Total number of live births per year per 1,000.
- Crude death rates(CDR): Total number of deaths per year per 1,000.
- Natural increase rate(NIR): The population increase calculated by the difference between the number of births and the number of deaths within a country.
- Total Fertility Rate(TFR): The average of number children a woman will have during her childbearing years.
- Infant Mortality Rate(IMR): The % of children who die before their first birthday per 1,000 live births in given population.
- Life expectancy: The average number of years a person is expected to live.
- Doubling rate is the amount of time needed to double a population.
- The Neolithic Revolution, the shift from hunting and gathering to the domestication of plants and animals, led to an increase in population .
- The Industrial Revolution began in England around 1750 and spread to North America in the 1800s. The Industrial Revolution was when many new factories and industries opened, causing a large rural-to-urban migration and a huge jump in population growth.The industrial revolution is the transition from stage 1 to 2.
- Urbanization
- Increased status of women
- TFR below 2.1 when going into stage 5.
- Neo-Malthusians support Malthus's theory and agree that the increased demand for food will lead to a decrease in population growth. On the other hand, anti-Malthusians disagree with Thomas Malthus's theory and agree that an increased demand for food will lead to better technology and stable food production.