1. Ecology Lesson 3 What causes populations to change in size?
What factors limit population growth?
How do limiting factors affect carrying capacity?

2. Do Now
What might happen to the size of particular population over time?
Why might populations leave or come?
Why might scientists want to monitor the size of the population?

3. Essential Question What causes populations to change in size?
What factors limit population growth?
How do limiting factors affect carrying capacity?

4. Vocabulary Immigration Emigration Birth rate Death rate
Population density
Limiting factors
Carrying capacity

5. Summarization Activity
Answer the EQ.
What causes populations to change in size?

6. Do Now
Use 4 words from your vocabulary list in a sentence.

7. Essential Question What causes populations to change in size?
What factors limit population growth?
How do limiting factors affect carrying capacity?

8. Assignment
Read pages
Complete the graphic organizer.

9. Determining population size -count all the members of the species -
Change in population size
Limiting factors

10. Do Now Papers are in your notebook. Read handout 56.
Complete Science explorer page 58.

11. -food Determining population size
-count all the member of the population
-observe signs of organisms
-estimate a small area and multiply it to find the number of a larger area
-mark and recapture
Change in population size
-births
-deaths
-Immigration
-emigration
Limiting factors
-food
-water
-space (shelter)
-weather conditions

12. Answer the essential questions.
What causes populations to change in size?
What factors limit population growth?
How do limiting factors affect carrying capacity?

13. 3, 2, 1 3 limiting factors 2 ways populations can change
1 ways that populations are limited