Population Dynamics

Population dynamics at a glance

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Population Dynamics by Mind Map: Population Dynamics

1. present population of the world is 7.6 billion

1.1. china -highest population followed by India

1.2. The annual growth rate of the world is 1.11%

2. Determinants of population change

2.1. crude birth rate - i.e. the number of live births per 1,000 people.

2.2. crude death rate ;i.e. the number of deaths per 1,000 people.

2.3. migration : is the movement of people in and out of the area.

2.3.1. Internal

2.3.2. International

2.4. population growth rate

3. Population Density

3.1. Areas of high density e.g. Ganga Plains, NW Europe, NA, SA & Africa

3.1.1. fertile soil

3.1.2. abundant rainfall

3.1.3. suitable for agriculture

3.1.4. development of settlement

3.2. Areas of moderate density eg. Deccan Plateau, central parts of the USA, Russia & W Africa

3.2.1. Hilly terrain

3.2.2. rocky terrain

3.2.3. less fertile soil and moderate rainfall

3.3. Areas of low density eg. parts of Africa (Namibia) and Australia

3.3.1. rugged relief

3.3.2. infertile soil

3.3.3. unfavorable climate

4. Population Composition

4.1. comprising ethnic characteristics, races, tribes, language, religion, literacy and education, age, sex, economically active population

4.1.1. Age-wise Children (less than 15 years -dependent Working -15 to 59 years - productive/ working Old age - above 59 years dependent

4.1.2. Sex ratio : number of females per 1000 males in a population

5. Population ;An interesting way of studying the population composition of a country is population pyramids, also called an age-sex pyramid

6. pattern of population distribution.

6.1. natural geographical & economic environment

6.1.1. Under population population that is less than the available resources of a country. Impact Positive impact - Negative Impact

6.1.2. Over Population : where a country has more people than its physical and human resources can support with adequate living standards Impact of over population Depletion of resources Unemployment Growth of slums Increase in demand will result in rise in cost Increase in environmental problems