Science for Grade-9-Quarter-1-MODULE 5.pptx

Biodiversity and Evolution

1. Science 9- Quarter 1 Module 5: BIODIVERSITY and EVOLUTION Measuring population density Prepared by: Ms. Evelyn C. Ba ñas

2. 1. Determine the pattern of population distribution. 2. Compare the distribution patterns of the different populations After going through this lesson you are expected to:

3. 1.What are sex-linked traits? 2.What are the examples of sex-linked trait diseases? REVIEW:

4. An article/Passage PHILIPPINE BIODIVERSITY Facts:

5. 1. Why is the Philippines considered one of the world's biodiversity hotspots? 2. Identify examples of threatened species mentioned in the passage? Processing Questions:

6. BANANA PLANTATION which picture shows biodiversity? P OPULATION ? TUBBATAHA REEF

7. SPECIES a group of organisms consisting of similar individuals capable of exchanging. genes or interbreeding.

8. Population Density - is the number of species/ individuals in a population per unit area. Pop. Density = N umber of Species Size of Area BIRDS Suppose 60 birds live in a 4 sq m plot of land. What would be the population density of birds ? What would the population density be if 100 birds lived in a 4 m2 plot of land?

9. BIRDS What causes the size of the population to change?

10. Population can be of the same size, but they may have different densities. Birth Rate Death Rate When new members moving into a population( Immigration )or When new members moving out of a population ( Emigration ) Changes in population aize may be attributed to many factors: 

11. In a community, there is always a population of different organisms and species. In an environment, the ecosystem needs to be balanced for them to survive. The size of population is always affected by different factors.

12. Limiting factors are environmental conditions that keep a population from increasing in size and help balance ecosystems.  Anything that limits the size of a population like certain environmental conditions are called LIMITING FACTORS

13. Examples of Limiting Factors: 1. Availability of food 2. Water and 3. Living conditions 4. Light Temperature 5. Soil Nutrients

14. CARRYING CAPACITY- the population size an environment can support. -it is affected by changes in the environment.

15. 01 02 03 04 05 06 Group Activity

16. Activity 1.2: Measuring Population Density Objective: Determine the population density using the mathematical formula; and compare the distribution patterns of the different populations. Materials: Manila paper, Marker, Calculator, Activity Sheets Procedures: 1. Study the pattern of population distribution in Figure 4. 2. Count the total number of assigned species. Record the number on the table provided on the board. 3. Using the given formula for computing population density, calculate the density of your assigned species.

17. Activity 1.2: Measuring Population Density Procedures: 3. Using the given formula for computing population density, calculate the density of your assigned species. Note: the species/organisms all occupy an area of 18cm x 20cm. 4. On a manila paper, provided on the board, write the calculated population density for the specific species. 5. Students will answer the guide questions.

18. 01 02 03 04 05 06 Answering of Guide Questions

19. ELABORATE: Since a large portion of the forest is already bald, many animals are losing their habitats and flooding is occurring in low-lying places as a result. As a student, what can you do to help solve this issue?  

20. EVALUATION: Direction: Determine Population Density. 1. If 40 flies occupy an area of 60 m 2 of grass, what is the Population Density of the flies? A. 0.33 C. 0.67 B. 0.50 D. 0.75  

21. Read and Study Activity 1.3 on your SLM Q1-Module 5 page 6.

22. Thank you ! For your active participation….