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

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?

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

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

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

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

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

Assignment Read pages 14-20. Complete the graphic organizer.

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

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

-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

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

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