Population Dynamics Natural change and Actual Change

Natural Change A change in the population due to the difference in # of births and the # of deaths. BIRTHS - DEATHS = NATURAL CHANGE BIRTHS > DEATHS = NATURAL INCREASE BIRTHS < DEATHS = NATURAL DECREASE

Which Natural Change? 6300 Births7800 Deaths Population had a NATURAL DECREASE of 1500 people Deaths5500 Births Population had a NATURAL INCREASE of 700 people.

Birth Rate The # of births per 1000 population. Calculation: # births in one year x1000 =Birth Rate Total Population

Death Rate The # of DEATHS per 1000 population. Calculation: # deaths in one year x1000 =Death Rate Total Population

Rate of Natural Increase (RNI) Difference between the Birth Rate and the Death Rate Formula: RNI=BR-DR Like before: –p–positive number (+) = naturally increasing population –n–negative number (-) = naturally decreasing population

Sample Exam Question

Sample Exam Question WITH Other Distracting Stats!

Sample Exam Question

Highly Developed Countries: Population, BR & DR Have a stable population! Birth Rates are generally low Death Rates are also generally low. WHY?

Highly Developed Countries – BR: The REASONS! Birth Rates are generally low because: Access to birth control Affordable birth control Women choosing careers (less kids, no kids, kids later in life) Lifestyles…leisure, travel, materialistic Education about family planning MUST STUDY!!!!!!

Highly Developed Countries – DR: The REASONS! Death Rates are also generally low: Advances in modern medicine and technology Access to health care Affordable health care Education & knowledge about healthy lifestyles & choices. Improved water and sanitation!!!! Better nutrition choices!!!!

Underdeveloped Countries: Population, BR & DR Have an EXPANDING population! Birth Rates are generally high. Death Rates are also generally high. Expanding because births are exceeding deaths at larger rates. WHY?

Underdeveloped Countries Birth Rates are generally high because: LITTLE to NO access to birth control Can’t Afford birth control..(food or birth control??) Children needed or used to contribute to the family (labor, money, food) Lack of education about family planning

Underdeveloped Countries Death Rates are also generally HIGH: Lack of modern medicine and technology Little or NO access to health care Unable to afford health care Lack of education & knowledge about healthy lifestyles & choices. Lack of clean water and sanitation Malnutrition

Actual Population Change & Migration Migration means the MOVEMENT of people from place to place. Immigration is the movement of people INTO a country. ADDS to the receiving countries population. Emigration is the movement of people OUT of a country…EXIT. TAKES away from the country of departure.

Actual Change While Natural Change only deals with births and deaths… Actual change recognizes ALL factors that can change a population. Births, deaths, Immigration and Emigration. AC = (B + I) – (D + E) AC = (Births + Immigration) – (Deaths + Emigration)

More on migration!! NET MIGRATION = the difference between immigration and emigration. MAP shows countries with +/- Net Migration.

More on migration!! INTERNAL MIGRATION refers to the migration of people within a country province or region. Newfoundland Labrador in the past 20+ years had been moving to Alberta & Ontario in search of jobs etc. OR Newfoundland Labrador experiences a fair degree of internal migration as people move from smaller outports to St. John's.

Sample MC Question