Transcript Human History

13.1 History Of The Human
Population
Objectives: Describe the major
events that have affected the rate of
human population growth throughout
history.
By: John and Tony
12 slides – 6 flashcards
Introduction
• In 1650, only 500 million people inhabited
Earth.
• Today there are over 5.5 billion people
living on Earth.
• The number of people increases by 80
million every year
• Scientists predict 8 billion people by 2017
and perhaps 12 billion by 2100.
Flashcard
13.1
13.1
geometric
progression
arithmetic
progression
1, 2, 4, 8, 16, . . .
the way the human
population has grown
since the
industrial revolution
1, 2, 3, 4, 5, . . .
Increase in Growth Rate
• Scientists estimate that the first modern humans
evolved on Earth about one-half million years
ago.
• About 20,000 years ago, some people established
permanent settlements.
• What is AGRICULTURAL REVOLUTION?
– When hunters and gathers begin to develop farming
techniques, and learn to masticate animals.
Flashcard
13.1
13.1
Agricultural
Revolution
The agricultural
revolution led to
occurred about 8000 BC
when hunter-gatherers
began to develop
farming techniques
and learned to
domesticate animals
an increase in the food
in excess of the population
leading to an
increase in the
population
Agriculture
• A second period of major population growth
occurred around 8000B.C.
• Farming provided an increased food supply,
which led to an increase in size of the
human population
• The human population grew to nearly 5
million, food availability accounted for
much of the growth
Industry
• The third major period of population growth
has occurred during the past 300 years
• Technological advancements have improved
food production and distribution
• Reduced the length of the work day and
provided people with safer work
environments
Health Care
• The germ theory of the disease occurred at
about the same time as the industrial
revolution
• What is the GERM THEORY? Disease
identified in bacteria and other
microorganisms as the agents responsible
for many diseases
• The biomedical revolution of the 20th
century has resulted in an increase in
population growth
Flashcards
13.1
Germ
Theory
of Disease
developed about 300
years ago, it identified
bacteria and other
microorganisms as the
agents responsible for
many diseases
13.1
The germ theory
which developed
during the industrial
revolution led to
population
growth
Declines in Growth Rate
• The decline in population growth started in the
mid 14th century
• The decline resulted in the Black Death which
struck some of Europe and Asia
• So devastating was the Black Death that within
several years it claimed 25 percent of the
population of Central Europe and Asia
Famine
• In the 1840s the Irish Potato Famine
resulted in the death of more than one
million people
• At this time the potato was the main staple
in Ireland
• When the disease called potato blight
destroyed the crop and caused severe
starvation
War
• Wars have caused a large decrease in the
human population in a short time
• Many lives have been lost in tribal and civil
wars throughout Africa, South America,
India, China, and the United States
• World War I claimed 10 million lives where
World War II claimed 17 million lives