Human Population Growth PowerPoint, Sustainability

• Human Population Growth Over Time.
Copyright © 2010 Ryan P. Murphy
Learn more: Human Population
http://www.prb.org/Educators/TeachersGuides
/HumanPopulation/PopulationGrowth.aspx

• RED SLIDE: These are notes that are very
important and should be recorded in your
science journal.

-Nice neat notes that are legible and use indentations
when appropriate.
-Example of indent.
-Skip a line between topics
-Don’t skip pages
-Make visuals clear and well drawn. Please label.
Ice
Melting Water
Boiling Vapor
GasT
E
M
P
Heat Added 

• RED SLIDE: These are notes that are very
important and should be recorded in your
science journal.
• BLACK SLIDE: Pay attention, follow
directions, complete projects as described
and answer required questions neatly.

• http://sciencepowerpoint.comWebsite Link:

 Sustainability: Meeting the needs of the
present without compromising the ability of
future generations to meet their own needs.

• How many kids do you want to have?

 Human Population Growth Over Time.
This is the scariest graph
you will ever see because
it has a serious impact on
your future.

Learn more: Human Population
http://www.prb.org/Educators/TeachersGuides
/HumanPopulation/PopulationGrowth.aspx

 New Area of Focus: Human Population
Growth.

• Activity! Visiting the Human Population
Clock.
– http://math.berkeley.edu/~galen/popclk.html

This is called exponential
growth. We can see the
doubling occurring here

• Add a few of these into your graph, It’s a
question of the assessment and important.

• Human hominids have been around for
millions of years.

millions of years. Early Modern Humans
for 100,000 years.

millions of years. Early Modern Humans
for 100,000 years. Their total population
never rose above ½ a billion.
– What changed, let’s investigate?

• Human hominids

• Human hominids
– Australopithecus (5-1 million years ago).

• Human hominids
– Vegetarian resource extractors.

• Human hominids
– Vegetarian resource extractors.
– Little impact on environment.

• Homo habilis; 2 to 1 million years ago; first
tool users (cultural adaptation)- Africa

• Homo erectus (1.5 million years ago to
200,000 years ago)

200,000 years ago)
– More complex tools & control of fire.

200,000 years ago)
– Omnivorous resource extractors.

200,000 years ago)
– Omnivorous resource extractors.
– Increased capacity to affect environment.

• Early Modern Humans / Cro Magnon Man
(300,000 to 0 years ago)

– Better resource extractors.

– Expanded resource base.

– Expanded cultural capability.

– Expanded cultural capability.
– Expansion to all habitable regions.

• Hunter / Gathers (Food Collectors)

– No direct / purposeful interference with
resource supply.

– No direct / purposeful interference with
resource supply.
– Emphasizes integration with environment.

• The Dorobo of Tanzania spend a few
hours in the morning finding food and then
socialize and relax for the rest of the day.

• I work 70+ hours a week. It is very
stressful and I just want to see my kids.

• Both have their ups and downs. A happy
medium between work and leisure may be
the recipe…

• Life expectancy of the modern world is
higher.
– Daily life of the Dorobo appears more relaxed.

• Homo Sapiens Sapiens
• (100,000 to 0 years ago)
– Culturally determined.
– Ability to control environment.

• (100,000 to 0 years ago)
–

• (100,000 to 0 years ago)
– Ability to control environment.
“Yaaaaaaaaaah!”
“Homo Sapiens Rock!”

 Anthropogenesis: Humans shaping their
environment.

• Prior to agriculture, hunters and gathers
had to follow the animals.
– To survive meant you had to move around.

• Food Foraging to Food Production
(Agriculture) started 10,000 years ago.

• Agricultural Revolution, It…

– Allowed societies to grow food for surplus.

– Surplus allowed society to stay in one place.

– Surplus allowed society to stay in one place.
– Extra time to invent and improve practice.

• Domestication of animals vs. all of human
history.

history.
Human
History

history.
Domestication
of animals
Human
History

• Milk, It does the body good… or does it?
– No other mammal on the planet drinks milk
past infancy.

• Some people feel that humans haven’t
coexisted long enough with animals to
consume dairy.
– Our bodies can’t break down dairy well.
(lactose)

• Complex society (civilization); urbanism
started 6,000 years ago.

• Activity -Folding paper and understanding
exponential growth.

exponential growth.
– How many pages thick can you get your
paper,

exponential growth.
– How many pages thick can you get your
paper,
– What happens every time the paper is folded.

• If we could fold the paper 42 times, it would
equal the distance from the earth to the
moon. (384,403 km from core)

• Video – Human Population Model 1 A.D. to
2030.
– http://www.youtube.com/watch?v=4BbkQiQyaYc

• 1750 – Finding Borrowed Light

• Fossil fuels are borrowed light:
– They are the energy rich organic matter from
millions of years ago.

• Millions and millions of years ago, the sun
fueled growth as it does today.

– Plants and animals grew / built-up carbon
compounds.

compounds.
– When they died, some of those carbon bonds
stayed together.

compounds.
– When they died, some of those carbon bonds
stayed together. (Those became our fossil fuels)

• The carrying capacity of the earth without
fossil fuels is estimated to be about one
billion people.

billion people. Even less if our habits don’t
change drastically.

change drastically. Current world
population is getting close to 7 billion.

population is getting close to 7 billion. The
fossil fuel supply will decline rapidly within
50 years.

population is getting close to 7 billion. The
fossil fuel supply will decline rapidly within
50 years.
• What will happen to the other 7 billion
people?

• Answer! Doom and Gloom. You do the math.
6 billion – X = 1 billion.

• Answer! Doom and Gloom. You do the math.
6 billion – X = 1 billion.
• X= Death by war and starvation.

• Answer! Doom and Gloom. Unless…

• Answer! Doom and Gloom. Unless…
• The bright side is coming…, but not yet.

 Carrying Capacity: The amount of food
that an area of land will yield.
 -

 Carrying Capacity: The amount of food
that an area of land will yield.
 Therefore, the number of people that an area
of land will support.

• Humans are really good at increasing our
carrying capacity.

• Video Link! World Food Crisis
• http://www.youtube.com/watch?v=-
ihiicyWKm0

• Video Link! Food Production and Climate
Change.
– http://www.youtube.com/watch?v=UW1Z_FIS
9zY&feature=results_main&playnext=1&list=P
LD038F5E6047D6AD8

• Limiting Factors: A factor that causes a
population to decrease in size.
– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Dependent
Factors
(Other living things)
Density Independent
Factors
(Non-living / Abiotic)

– Sunlight
– Water
– Temperature

– Sunlight
– Water
– Temperature
Density Independent
Factors

– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Independent
Factors

– Which is density independent and which is
density dependent?

– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Dependent
Factors
Density Independent
Factors
Borrowed

– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Dependent
Factors
Density Independent
Factors
Borrowed
Dams

– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Dependent
Factors
Density Independent
Factors
Borrowed
Dams
Clothes
Climate
Control

– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Dependent
Factors
Density Independent
Factors
Borrowed
Dams
Clothes
Climate
Control
Vaccines

– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Dependent
Factors
Density Independent
Factors
Borrowed
Dams
Clothes
Climate
Control
Vaccines
Hygiene

– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Dependent
Factors
Density Independent
Factors
Borrowed
Dams
Clothes
Climate
Control
Vaccines
Hygiene
Weapons,
(tool use)

– Sunlight
– Water
– Temperature
– Disease
– Parasites
– Predators
– Competition
Density Dependent
Factors
Density Independent
Factors
Borrowed
Dams
Clothes
Climate
Control
Vaccines
Hygiene
Weapons,
(tool use)
This is a picture of food aid being
delivered to an area of the world that
needs it very badly.

• This is a very important limiting factor in
the human population.

• Are we a R Species or a K Species?
R Species K Species
Organism is very small size Large Organism
Energy to make a new organism is low Energy to make a new organism is high
Many babies made at once Low number of babies made at a time
Early maturity Long time for maturity
Short Life Long Life
Each individual reproduces once and
then dies
Individuals can reproduce many times
throughout life

• Are we a R Species or a K Species?
R Species K Species
then dies
throughout life
The key idea of r/K selection theory is that evolutionary pressures tend to
drive animals in one of two directions — towards quickly reproducing animals
who adopt as many niches as possible using simple strategies, and slowly
reproducing animals who are strong competitors in crowded niches and
invest lots of energy in their offspring.

• So what’s the problem.
R Species K Species
then dies
throughout life

• Video Link (Optional) Human Population
Crashcourse.
– https://www.youtube.com/watch?v=E8dkWQVFA
oA&list=PL8dPuuaLjXtNdTKZkV_GiIYXpV9w4W
xbX

• Video Link (Optional) Population Ecology
Crashcourse.
– https://www.youtube.com/watch?v=RBOsqmBQBQ
k&list=PL8dPuuaLjXtNdTKZkV_GiIYXpV9w4WxbX

• Conclusion

• Conclusion
– Carrying capacity was artificially increased by
the introduction of agriculture beginning
roughly 10,000 years ago.

• Conclusion
– Population increase was accelerated after
10,000 years ago, but not at modern levels.

• Conclusion
– Massively accelerated population growth is a
modern phenomenon.

• Conclusion
– Massively accelerated population growth is a
modern phenomenon.
– Human population growth is not a biological
imperative, but is culturally determined.

• Malthus Approach to Biological Population
and Carrying Capacity

– A biological population (including humans)
increases until carrying capacity is exceeded,
resulting in starvation and death.

resulting in starvation and death of millions.

resulting in starvation and death of maybe
billions.

• Boserups Approach to Human Populations
and Carrying Capacity:

• Boserups Approach to Human Populations
and Carrying Capacity:
– Human population will increase only if
carrying capacity is increased; human
population growth is culturally determined.

• What do you think the future will be?

• Human Footprint: A measure of human
demand on the earth's ecosystems.
.

– How much land is needed to regenerate the
resources needed for people each year?
.

– How much land is needed to regenerate the
resources needed for people each year?
– Where do we put the waste?
.

 Megalopolis: A very large urban complex
usually involving several major cities and
towns.

• Urban Sprawl: The uncontrolled or
unplanned extension of urban areas into the
countryside.

• Which will become the future?

“Your so
negative, it isn’t
like what your
saying, we don’t
have these
problems.”

• Field Trip! Touring the east coast from
Manchester NH to Washington DC.
• http://www.google.com/earth/index.html
• Record with a line IIII
– Green Space not G.C.
– Housing
– Industry
– Shopping / Parking
– Landfill
– Oil refinery
– Golf Courses

• Your Reaction’s
– What did you think?
– What did you see the most?
– What did you see the least?
– How does our town compare?

• No thought about sustainability here...

http://sciencepowerpoint.com/Energy_Topics_Unit.html
Areas of Focus within The Matter, Energy, and the Environment Unit.
There is no such thing as a free lunch, Matter, Dark Matter, Elements and
Compounds, States of Matter, Solids, Liquids, Gases, Plasma, Law Conservation of
Matter, Physical Change, Chemical Change, Gas Laws, Charles Law, Avogadro’s
Law, Ideal Gas Law, Pascal’s Law, Viscosity, Archimedes Principle, Buoyancy,
Seven Forms of Energy, Nuclear Energy, Electromagnet Spectrum, Waves /
Wavelengths, Light (Visible Light), Refraction, Diffraction, Lens, Convex / Concave,
Radiation, Electricity, Lightning, Static Electricity, Magnetism, Coulomb’s Law,
Conductors, Insulators, Semi-conductors, AC and DC current, Amps, Watts,
Resistance, Magnetism, Faraday’s Law, Compass, Relativity, Einstein, and E=MC2,
Energy, First Law of Thermodynamics, Second Law of Thermodynamics, Third Law
of Thermodynamics, Industrial Processes, Environmental Studies, The 4 R’s,
Sustainability, Human Population Growth, Carrying Capacity, Green Design,
Renewable Forms of Energy.

• Please visit the links below to learn more
about each of the units in this curriculum
– These units take me about four years to complete
with my students in grades 5-10.
Earth Science Units Extended Tour Link and Curriculum Guide
Geology Topics Unit http://sciencepowerpoint.com/Geology_Unit.html
Astronomy Topics Unit http://sciencepowerpoint.com/Astronomy_Unit.html
Weather and Climate Unit http://sciencepowerpoint.com/Weather_Climate_Unit.html
Soil Science, Weathering, More http://sciencepowerpoint.com/Soil_and_Glaciers_Unit.html
Water Unit http://sciencepowerpoint.com/Water_Molecule_Unit.html
Rivers Unit http://sciencepowerpoint.com/River_and_Water_Quality_Unit.html
= Easier = More Difficult = Most Difficult
5th – 7th grade 6th – 8th grade 8th – 10th grade

Physical Science Units Extended Tour Link and Curriculum Guide
Science Skills Unit http://sciencepowerpoint.com/Science_Introduction_Lab_Safety_Metric_Methods.
html
Motion and Machines Unit http://sciencepowerpoint.com/Newtons_Laws_Motion_Machines_Unit.html
Matter, Energy, Envs. Unit http://sciencepowerpoint.com/Energy_Topics_Unit.html
Atoms and Periodic Table Unit http://sciencepowerpoint.com/Atoms_Periodic_Table_of_Elements_Unit.html
Life Science Units Extended Tour Link and Curriculum Guide
Human Body / Health Topics
http://sciencepowerpoint.com/Human_Body_Systems_and_Health_Topics_Unit.html
DNA and Genetics Unit http://sciencepowerpoint.com/DNA_Genetics_Unit.html
Cell Biology Unit http://sciencepowerpoint.com/Cellular_Biology_Unit.html
Infectious Diseases Unit http://sciencepowerpoint.com/Infectious_Diseases_Unit.html
Taxonomy and Classification Unit http://sciencepowerpoint.com/Taxonomy_Classification_Unit.html
Evolution / Natural Selection Unit http://sciencepowerpoint.com/Evolution_Natural_Selection_Unit.html
Botany Topics Unit http://sciencepowerpoint.com/Plant_Botany_Unit.html
Ecology Feeding Levels Unit http://sciencepowerpoint.com/Ecology_Feeding_Levels_Unit.htm
Ecology Interactions Unit http://sciencepowerpoint.com/Ecology_Interactions_Unit.html
Ecology Abiotic Factors Unit http://sciencepowerpoint.com/Ecology_Abiotic_Factors_Unit.html

• The entire four year curriculum can be found at...
http://sciencepowerpoint.com/ Please feel free to
contact me with any questions you may have.
Thank you for your interest in this curriculum.
Sincerely,
Ryan Murphy M.Ed
www.sciencepowerpoint@gmail.com

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