This document outlines a science lesson on ecosystems and human impact on the environment using the 7E method. It includes learning areas that examine pictures and ask students to identify components of ecosystems like forests and deserts. Students are asked to consider the impacts of deforestation, pollution and climate change on animals. They are tasked with suggesting ways to minimize human effects like reducing energy use and protecting trees. Groups are assigned slogans, drawings or skits around environmental conservation themes. Rubrics assess cooperation and adherence to directions.

1. DEMONSTRATION TEACHING
IN SCIENCE 8
(7 E’s Method)
NIEL M. BAJAO
TEACHER

2. OBJECTIVES
Content Standard: The learners demonstrate an
understanding of the one-way flow of energy and the cycling of
materials in an ecosystem.
Performance Standard: The learners should be able to
make a poster comparing food choices based on the trophic
levels.
Learning Competency: Suggest ways to minimize human
impact on the environment S8LT-IVj-25

4. EARTH

6. ANIMALS

8. FOREST

10. DESERT

12. GARBAGE

13. LEARNING AREA 1
Directions:
1. Examine the picture.
2. What is the picture about?
3. Is Global warming real or not?
Explain your
answer briefly.
4. Give 3 things that can contribute
to
global warming.

14. LEARNING AREA 2
Directions:
1. Examine the pictures. What do you
think happened?
2. Cutting down trees to use the land for
something else rather than a forest is called
deforestation.
Give 3 reasons why people do this.
3. What will happen if we continue
cutting down our trees?
4. What can we do to save the trees?

15. LEARNING AREA 3
Directions:
1. Examine the pictures.
2. Global warming heavily affects the
lives of animals. Some species have a great
decline in population. Some are already
endangered.
Cite one reason why animals are
important.
3. Give 3 things that animals can
provide.

16. LEARNING AREA 4
Directions:
1. Examine the
pictures.
2. List down 5 ways to
lessen our use of energy at
home.

17. GROUP 1
Write a slogan about
saving energies in our
homes.

18. GROUP 2
Draw 3 activities that show people
taking good
care of the environment.

19. GROUP 3
Make a short skit about a family
saving energy and taking good
care of the environment.

20. RUBRICS
5 points 3 points 2 points
THEME
The output
followed the
directions
excellently.
The output
followed the
directions but with
minimal errors.
The output did not
follow the
directions
COOPERATION
All members
cooperated to
finish the activity
Most members
cooperated to
finish the activity
Few members
cooperated to
finish the activity

21. Directions: Choose the letter of the correct answer. Write the chosen letter on a separate
sheet of paper.
1. Which action can have the greatest impact on reducing the threat of global warming?
a. composting c. reducing
b. recycling d. planting a tree
2. Why should we care about the rainforests?
a. They provide or nurture biodiversity.
b. They are sources of food and other resources.
c. They are a source for medicines and other chemicals.
d. All of the above.

22. 3. How might products be designed so that they are more "environment-friendly"?
a. Less energy should be required for their use.
b. Less energy should be used in their manufacture.
c. Products should be designed to be recycled or reused.
d. All of the above make products more "environment-friendly".
4. Which of the following is not an effect of global warming?
a. extinction of animals
b. proliferation of trees
c. rise of sea level
d. melting of ice caps

23. 5. Which of the following leaves less human impact in the environment?
a. deforestation
b. heavy smoke emissions from factories
c. using energy-saving appliances
d. burning garbages

24. EXTEND
Recreate the habitat of an
endangered or extinct species in a
medium of your
choice. Use one of the media listed
below. Show the elements of the
ecosystem that
human activities have affected and
that are contributing to the decrease
of species.
You can create one of the
following (pictures from
www.yahoo.com images) or a drawing
or a writing that uses vivid imagery.