1. Get to work…
In your ISN table of contents, fill in pages 60 and 61 as Population Density/Distribution.
On the top of ISN pages 60 and 61, put Oct 12 and Population Density/Distribution. (Remember: all the way in the top corner and box it in)
Yesterday’s worksheet is on page 61.
Start filling in the worksheet, starting on textbook page 104.

2. Reminders … Cell phones Backpacks, food/drink
There are zeroes in the gradebook. Office hours!
Wednesday PSAT (graphing)
Summative Friday
Lost and found: men’s bracelet, small key, reading glasses

3. Today …
We will read about and take notes on population size and density.
We will review the note for accuracy.
We will organize the information into an informational chart.
Time permitting, we will move on to population distribution.

4. Worksheet … What is the definition of Population Size:
It describes the number of individual organisms present in a given population at a given time.
When a population size __________________ or remains steady, this is often a sign of a healthy population.
If a population size begins to _____________ rapidly, this can be a signal that extinction is coming.
increases
decline

5. Worksheet …
Explain why the passenger pigeon, which was once the most abundant bird in North America, disappeared completely.
Cutting down forests made it easy to hunt the birds. Too many were killed and sold for food.

6. Worksheet …
Instead of counting each organism individually, ecologists use _______________ methods to estimate population sizes.
Describe how you could determine the population size of a specific type of plant in a large forest without counting all of the plants.
Count the number of plants in a small sample area. Then estimate how many would be in the larger area.
sampling

7. Worksheet … What is the definition of Population Density:
The number of individuals within a population per unit area.
How can high population density be helpful to a population?
It is easier to find mates.
How can high population density be harmful to a population?
There is a lot of competition for resources.
Diseases can spread faster.
Individuals are more vulnerable to predators.

8. Worksheet …
High Population Density

9. Worksheet …
Low Population Density

10. Notebook … Term Picture Example Good Bad High Population Density
XXX X XX
XXX XXX
XXXX XX
Easy to find mates
Low Population Density
Cheetahs, bears

11. Notebook … Term Picture Example Good Bad High Population Density
XXX X XX
XXX XXX
XXXX XX
School of fish, insects
Easy to find mates
Disease can spread fast
Low Population Density
Less competition for resources X
X X
Hard to find mates
Cheetahs, bears

12. How do changes in population size relate to environmental conditions?
Aha Connections
Aha Connections
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Aha 1: I can differentiate between the levels of ecological organization (pages 58 and 59).
Aha 2: I can describe the resources, biotic and abiotic factors, that organisms require to survive in a habitat (page 54).
Aha 3: I can explain how changes in population size can indicate the health of a population (page 61)
How do changes in population size relate to environmental conditions? 56 57

13. Get to work…
Attach the worksheet to page 61 under the other one that is already there (tape on one side only)
Start filling it in, starting on textbook page 107.