Vocab
Crude Birth Rate (CBR)
The total number of live births in a year for every one thousand people alive in a society.
Describe what the Stage 1 pop. pyramid looks like
Wide base, Skinny at top, etc.
What happens in DTM stage 1?
There is high mortality rates and birth rates
What is Malthus's Theory?
Malthusianism is a theory that population growth is potentially exponential. While the growth of the food supply or other resources is linear, which eventually reduces living standards to the point of triggering a population decline.
Total Fertility Rate (TFR)
The average number of children a woman will have throughout her childbearing years.
Describe Stage 2 of a pop. pyramid
Wide, looks like a pyramid,etc.
What happens in Stage 2 of DTM?
mortality falls, but birth rates are still high
What is the Cornocopian Theory
Cornucopianism is the idea that continued supply of the material needs of humankind can be achieved through continued advances in technology.
Physiological Density
The number of people per unit of arable land, which is suitable for agriculture.
Describe stage 3 of population pyramid.
Narrower, triangular shape
What happens in Stage 3 of DTM?
mortality is low, and birth rates begin to fall
Who is Paul Ehrlich?
He is a popular neo-malthusian, he famously stated: The battle to feed all of humanity is over. In the 1970s hundreds of millions of people will starve to death in spite of any crash programs embarked upon now. At this late date nothing can prevent a substantial increase in the world death rate.Helped encourage government policies
Natural Increase Rate (NIR)
The percentage growth of a population in a year, computed as the crude birth rate minus the crude death rate.
Describe stage 4 of the population pyramid.
a rectangular shape, with equal numbers of individuals in each age group.
What happens in Stage 4 of DTM?
mortality and birth rates are low
Who is Thomas Malthus
Thomas Malthus was an English economist and demographer best known for his theory that population growth will always tend to outrun the food supply and that betterment of humankind is impossible without strict limits on reproduction.
Epidemiology
The branch of medical science concerned with the incidents, distribution, and control of diseases that are prevalent among a population at a special time and are produced by some special causes not generally present in the affected locality.
Describe what a stage 5 population pyramid
Looks like a vase, really narrow base, etc.
What happens in stage 5 in the DTM
In Stage 5, countries the birth rates remain low, and the death rates go up
What is the Demographic theory?
The theory that societies progress from a pre-modern regime of high fertility and high mortality to a post-modern regime of low fertility and low mortality.