The document focuses on biodiversity and population density, aiming to help students understand patterns of population distribution and factors affecting population size. It includes objectives, review questions about biodiversity in the Philippines, and activities for calculating population density using mathematical formulas. Various limiting factors that impact population growth, as well as instructions for classroom activities, are also outlined.

1. SCIENCE 9- QUARTER 1
MODULE 5: BIODIVERSITY AND EVOLUTION
MEASURING
POPULATION DENSITY
Prepared by: Ms. Evelyn C. Bañas

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:

6. 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:

7. BANANA PLANTATION
WHICH PICTURE SHOWS BIODIVERSITY?POPULATION?
TUBBATAHA REEF

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

11. - is the number of
species/ individuals in
a population per unit
area.
Pop. Density= Number 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?

12. BIRDS

13. - Population can be of the same size, but
they may have different densities.
1. Birth Rate
2. Death Rate
3. 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:

14. 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.

15. 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

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

17. the population size an
environment can support.
-it is affected by changes in the
environment.

18. 01
02
03
04
05
06

19. 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.

20. 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.

21. 01
02
03
04
05
06

22. 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?

23. Direction: Determine Population Density.
1. If 40 flies occupy an area of 60 m2 of grass,
what is the Population Density of the flies?
A. 0.33 C. 0.67
B. 0.50 D. 0.75

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

25. Thank you !
For your active participation….