1. Populations increase as individuals are born.
Populations decrease as individuals die
The number of births compared to the number of deaths helps to determine if a population is increasing or decreasing.

3. Checking understanding
Factors
Increase population size
Decrease population size

4. How natural equilibrium is maintained in an ecosystem
How natural equilibrium is maintained in an ecosystem? Which factors increase / decrease population size.

5. Objective (s)/ I can: Objective (s)/ I can:
Explain how biotic and abiotic resources can be limiting factors in an ecosystem.

6. Discuss the moral and scientific aspects of this picture and connect it to the objective of the lesson.

7. Each group will get a picture,
Activity 1: Analyzing visuals and predicting consequences---Cause/Effect. CCC
Each group will get a picture,
Analyze it by examining the effecting and affected factors, and then
Swap the pictures between the groups.

8. Limiting factors 3 1 2 5 4 6

9. 2 3 4 5 6

10. Limiting factor Case # Limiting factor Type /nature
Effect on the population

11. Limiting factor Case # Limiting factor Type /nature
Affect on the population
1-plant growing in a rock whole
Rock
Abiotic
Limits the growth of the plant population.
2- withered flowers in snow
3- Lion hunting a zebra
4- A disease affecting a leaf
5-people facing a flood
6- using insecticides for plants

12. Elaborate:
Find solutions to decrease the mosquito population in a large city with many people. Solve p:89 “Engineer it”

14. Objective (s)/ I can:
Students analyze graphical data to develop arguments for why a population increased or decreased.

15. Recall
The amount of resources in an area influences the size of a population.
A population may grow or shrink, depending on whether important resources are added to or lost from the environment.