Semi-detailed Lesson
Plan
Teacher
Subject
Grade
Science( Biology)
Vlll
I. OBJECTIVES:
At the end of the lesson, learners should be able to:
a. Identify the ecological relationships among living things.
b. Perform different activities related to the lesson.
c. Appreciate the importance of ecological relationships in an ecosystem.
II. SUBJECT MATTER:
a. Topic: Ecological Relationships
b. References:
 Science Links
 Science Health, Technology, and Environment
c. Materials:
Illustration, chart, activity sheet, power point presentations
d. Process Skills:
Observing, Analyzing, Describing
III. LESSON PROCEDURE
A. Preliminary Activities
1. Daily Routine
 Opening Prayer
 Greetings
 Checking of Cleanliness and Attendance
2. Review
 The students will search the answer of the following questions on the word hunt.
1. It is the sequence of food transfer from producer to the
decomposer. (food chain)
2. These are the heterotrophic organisms that depend in other
organisms for nourishment and for the supply of energy.
(consumers)
3. These are autotrophic organisms that are capable of making
their own food. (producers)
4. It is the food making process of the plants. (photosynthesis)
5. It is composed of several food chains that are interconnected. (food web)
B. Lesson Proper
1. Engage:
 The students will observe the pictures posted on the board and answer the
following questions:
1. What is your understanding about the word “relationship”?
2. What relationships are depicted in the pictures?
3. What other relationships do you know of?
4. Is this relationship limited to human beings only?
 Unlocking of difficulties:
The students will arrange the following jumbled letters correctly.
1. glyocoe – study of how organism interact with their environment.
( ecology )
2. Eoolgsitc - scientist who study the relationships of organism with their
environments. ( Ecologist )
3. Itnrecaiton – is a kind of action that occurs as two or more objects
have an
effect upon one another. ( Interaction )
4. Itrnepedncednee - mutual reliance between two or more organism
( Interdependence )
5. Sspeeci – a group of related animals or plants that is smaller than a genus.
( Species )
2. Explore:

The teacher will group the class into five. They will be given 5 minutes to do the
activity. One representative will present their work.
3. Explain:
Ecological Relationships
Symbiotic Relationships – are interactions wherein two organisms of different
species interact, with at least one of the species benefiting from the interaction.
 Mutualism – is the relationship which two organisms interact and they
benefit from each other.
 Parasitism – is a relationship wherein one organism is benefited while
the other one is harmed.
Parasite –organism that benefits from the interaction
Host – organism that harmed in the interaction
 Commensalism – is a relationship wherein one organism benefits from
the interaction without harming the other organisms.
Commensal – organism that benefits from the interaction
Host – organism that is unharmed and provides help
 Competition - is a relationship in which organisms compete for the same needs
such as food, shelter, or mate.
 Intraspecific competition – competition happens between organisms
of the same species
 Interspecific competition – competition happens between organisms
of different species
 Predation – is the interaction where the predator kills the prey for food.
 Predator – organism that kills for food
 Prey – organism that is being hunted
a. Discussion/Analysis
1. Why do living organisms need to interact with one another?
2. What are the effects of interaction among organisms?

b. Generalization:
*What have you learned from today’s discussion?
*Are these ecological relationships important in our ecosystem? Why?
*What example of symbiotic relationship do you think we should
practice when interacting to others?

4. Elaborate:
The class will be group into three and they will work on the activity
assign to their group.
Group 1= Create comic strips about the benefit or harm
caused by each ecological relationship.
Group 2 = Classify the relationship that exists to the given organisms.
Group 3 = Create and recite a poem to explain the ecological
relationships.
5. Evaluate:
 Multiple Choice. Read and answer the questions on the interaction of living
things. Choose the letter of the correct answer and write your answer on the
blank before the number.
_____b____1. What ecological relationship exists when four banana
plants are planted on the same area?
a. commensalism
b. competition
c. predation
_____a____2. A worm lives on the leaves of the calamansi plant.
Which of the two organisms is the parasite?
a. worm
b. calamansi plant
c. leaves
_____b____3. Which of the following is an example of organisms that
show commensalism?
a. eagle on snake
b. egret to a carabao
c. fishes and plants in the aquarium
_____b____4. Which of the following organism is NOT a predator?
a. eagle
b. goat
c. lion
______c___5. What ecological relationship exists on the butterfly and
flower?
a. parasitism
b. predation
c. mutualism
IV. ASSIGNMENT:
1. List down the ecological relationships that exist between organisms that
can be found on your backyard or around your community.
2. What are the ecological problems we experienced nowadays?
3. Give some conservation measures on improving the environment and
preserving the natural resources.
Ref. Science Links pp. 234-236
Group ! Activity
Directions: Form the given puzzle. Tell something about the relationship of
two species in front of class.
Group 2 Activity
Directions: Form the given puzzle. Tell something about the relationship of
two species in front of class.
Group 3 Activity
Directions: Form the given puzzle. Tell something about the relationship of
two species in front of class.
Group 4 Activity
Directions: Form the given puzzle. Tell something about the relationship of
two species in front of class.
Group 5
Directions: Form the given puzzle. Tell something about the relationship of
two species in front of class.