LESSON PLAN in SCIENCE
GRADE 7
QUARTER 2 WEEK 6
I. OBJECTIVES:
At the end of the lesson, learners should be able to:
a. identify and describe the ecological relationships among living things;
b. describe the effects of interactions among the organisms in their environment;
c. cite examples showing how living organisms depend on each other for their needs to
survive
II. SUBJECT MATTER:
a. Topic: Ecological Relationships
b. References: Science 7 Learners Material pages 127-131
c. Materials:
pictures, visual aids, activity sheet
III. LESSON PROCEDURE
A. Preliminary Activities
 Opening Prayer
 Greetings
 Checking of Cleanliness and Attendance
B. 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. (consumer)
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 interlinked of several food chains. (food web)
C. Motivation
Students will roam around the room to inspect the pictures (GALLERY WALK)
Questions:
1.
2.
3.
4.
5.
What pictures do you see around the room?
What does these pictures depicts?
Have you witnessed such situations?
What relationships do the organisms have?
How are the related to our lesson today?
III. LESSON PROPER
A. Activity
Group the students into five(5). Each group will analyze the situation given in the picture.
Then, answer the following questions. Group reporting will follow.
B. Abstraction
DISCUSSION/ANALYSIS
Symbiotic Relationships – are interactions wherein two organisms of different species
interact, with at least one of the species benefiting from the interaction while farming
the organism or affecting at all.
Mutualism– is the relationship where two organisms interact and benefit from each other.
Parasitism– is a relationship where one organism is negatively affected and oftentimes
harmed.
Parasite – organism that benefits from the interaction
Host– organism that is harmed in the interaction
Commensalism– is a relationship where one organism benefits from the interaction without
harming the other.
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.
Predation– is the interaction where the predator kills the prey for food.
Predator–organism that kills for food
Prey– organism that is being hunted
C. Application
Choose one (1) ecosystem below, write down 1 example per ecological relationship
that can be found in the ecosystem you have chosen.
D. Generalization
1. Why do living organisms need to interact with one another?
2. How do the interactions among organisms affect their lives and activities?
3. What will happen if there are no ecological relationships?
4. In your own opinion, do you think ecological relationship is important? Why or why not?
IV. ASSESSMENT
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.
_____1. What ecological relationship exists when the banana plants are planted on the
same area? a. commensalism
b. competition
c. predation
_____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
_____3. Which of the following is an example of organisms that show commensalism?
a. eagle and snake
b. seedlings in a pot
c. orchids on the branches of trees
_____4. Which of the following organism is NOT a predator?
a. eagle b. fly c. cat
______5. What ecological relationship exists between a lichen and a tree?
a. parasitism
b. predation
c. commensalism
V. ASSIGNMENT:
1. What are the ecological problems we experienced nowadays?
2. Give some conservation measures on improving the environment and preserving the
natural resources in your area.
Activity
Read and analyze the given situation on each group. Then, answer the following questions.
GROUP 1
The butterfly gets nectar from a flower, on the other hand, flower gets pollinated by the help of the
butterfly. They benefit from one another. The relationship that exists between them is called
mutualism.
Questions :
1. With the given example, define mutualism.
2. Give another example of mutualism and describe relationship
they have.
Group 2
The egrets eat the insects around the cattle as it moves around. The egret gets benefited from the
cattle yet the cattle is not affected at all. The egret is called commensal while the cattle is
called host. The relationship that exists between them is called commensalism.
Question:
1. What is commensalism?
2. What is the difference between commensal and host?
3. Give another example of commensalism.
Group 3
The mosquito sucks blood from the human. The human is called host because it is the one that is harmed
by the mosquito. On the other hand, mosquito is called parasite because it harms the host. The
relationship that exists between them is parasitism.
QUESTION:
1. What is the difference between parasite and host?
2. Given the situation above, give the definition of parasitism.
3. Give another example of parasitism.
Group 4
The two deers compete for their basic necessities like food, shelter, or mate. The
relationship that exists between them is called competition.
QUESTION:
1. What is competition?
2. Why organisms need to compete with other organism?
3. Give other example of competition.
Group 5
The tiger eats the deer. The tiger is called predator because it kills another organism for food. While the
deer is called prey because it is killed and haunted by the predator. The relationship that exists between
them is called predation.
Questions:
1. What is predation?
2. What are the differences between predator and prey?
3. Give other examples of predation.