1. No Cornell Summaries Today!
Population
Pollution
EQ:
Note
Video Reaction
Biological Magnification
EQ:
Note:
Human Population:
Human Growth
114
115

2. H.I.P.P.C.O Habitat Fragmentation Invasive Species Population
Intro: Read
H.I.P.P.C.O
Habitat Fragmentation
Invasive Species
Population
Pollution
Climate
Overexploitation

3. Population geographic distribution: where and how close
NBpg. 114 Top
Population
EQ: Understand the trend of human population growth, including all factors.
The scientific study of human populations is called demography, which examines the characteristics of human populations and attempts to explain how those populations will change over time.
Three important characteristics of a population are its:
geographic distribution: where and how close
population density: how many.
Individuals that enter (immigration)
Individuals that leave (emmigration)
growth rate: birth versus death.

4. Population Analyzing the Chart:
Read and Analyze
Population
Analyzing the Chart:
1. Determine the population increase from 1950 to 2010.
2. Does the 2050 prediction make sense and why?
World-O-Meter
Don’t draw:

5. Historical Overview
Read and Analyze
Like the populations of many other living organisms, the size of the human population tends to increase with time.
For the majority of human existence, the population grew slowly, very slowly.
Limiting factors kept population sizes low. (What factors?)
About 500 years ago, the human population began growing more rapidly. (What do you think happened?)
Life was made easier and safer by advances in agriculture and industry.
Death rates were dramatically reduced due to improved sanitation, medicine, and healthcare, while birthrates remained high.
With these advances, the human population experienced exponential growth.

6. Human Population Growth
Draw the Graph on NBpg. 114: Middle
Human Population Growth
How did we get big so fast?
World Population

7. Population (Cont.) Exponential Growth Logistic Growth
NBpg. 114 Bottom
Population (Cont.)
Exponential Growth
Logistic Growth
Under ideal conditions with unlimited resources, a population will grow exponentially. Species reproduce at a constant rate.
Logistic growth occurs when a population's growth slows or stops (carry capacity), as resources become less available.
(Draw)
(Draw)

8. Copyright Pearson Prentice Hall

9. Copyright Pearson Prentice Hall
Pollution images
Copyright Pearson Prentice Hall

10. NBpg. 115
Pollution
EQ: Understand the different types and consequence of pollutions.
Pollution is the process of making a natural environment dirty and unsafe or unsuitable to use by introducing a contaminant.
There are different types of pollution: (Draw an
Land: landfill wastes, soil contamination example)
Water: sewage, non-biodegradable material
Air: smog, acid rain, combustion of carbon
Noise: urban/city noises, sonic waves
Light: city lights

11. Watch: https://www.youtube.com/watch?v=JaSe85Mcwp0
After the video:
a. Identify 3 different types of pollution b. c.
2. Personally reflect of the video. (How did it make you feel? As a species, what do humans need to change?)

12. How bioaccumulation happens:
Read (5) and Analyze:
One of the most serious problems occurs when toxic compounds accumulate in the tissues of organisms.
“Di-chloro-di-phenyl tri-chloroe-thane”, or DDT, one of the first pesticides, is a good example of this. For a long time DDT was considered harmless, and it drained into rivers and streams in low concentrations.
However, DDT is non-biodegradable, which means that it cannot be broken down by organisms- being hazardous.
Once DDT is picked up by organisms, it cannot be eliminated from their bodies.
By the early 1970s, DDT was banned in the U.S. and in most other industrialized countries; as a result, affected bird populations have recovered.

13. A consequence to pollution, can be biological magnification
NBpg. 115 (TBpg152)
Magnification of DDT Concentration
A consequence to pollution, can be biological magnification
Where concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web.
Other Scenarios:
Mercury
Teflon
BPA
In the process of biological magnification, the concentration of a pollutant such as DDT—represented here by orange dots—is multiplied as it passes up the food chain from producers to consumers.
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