The document outlines a lesson plan focused on understanding and utilizing a compound microscope, including its main parts and functions, such as the eyepiece, objective lenses, and diaphragm. It details objectives for learners to identify microscope components, demonstrate proper handling, and enhance their observational skills. Also included are instructional strategies for preparing slides, adjusting focus, and managing illumination to improve clarity and detail in observations.

2. • Magnify the unseen world
• Intricate details unfurled
• Cells and Creatures, big and small,
• Revealed beneath the lens, we call
• Observing life in its tiny scope
• Scientific wonders, giving hope
• Concealed mysteries, now clear
• Optical marvels bring them near
• Patterns, structures, come alive
• Exploring realms that thrive

3. The Microscope
What I know What I wonder What I learned

4. SCIENCE 7
second QUARTER- lc 1
Matatag curriculum
Exploring the Compound
Microscope

5. Exploring the Compound
Microscope
CONTENT
Familiarity and proper use of a
compound microscope are essential to
observe cells.
LEARNING
STANDARD
Identify the parts and functions, and
demonstrate proper handling and
storing of a compound microscope
LEARNING
COMPETENCY

6. By the end of the lesson, the 80 percent of
the learners will be able to:
1. Identify the main parts of a compound microscope
and describe their functions.
2. Demonstrate the proper handling and storing of a
compound microscope.
3. Appreciate the compound microscope by
answering the reflection of learning.
OBJECTIVES

7. I. Activating Prior Knowledge
Short Review
Learners will identify the parts of compound microscope.
I. Activating Prior Knowledge
Eyepiece (Ocular Lens):
▪ Provides the final
magnification of the
image.
▪ Usually 10x
magnification.

8. I. Activating Prior Knowledge
Short Review
Learners will identify the parts of compound microscope.
I. Activating Prior Knowledge
Objective Lenses:
▪ Provide the initial
magnification of the
specimen.
▪ Typically come in 4x, 10x,
40x, and 100x
magnifications

9. I. Activating Prior Knowledge
Short Review
Learners will identify the parts of compound microscope.
I. Activating Prior Knowledge
Revolving Nosepiece:
▪ Holds the different
objective lenses and
allows the user to switch
between them.

10. I. Activating Prior Knowledge
Short Review
Learners will identify the parts of compound microscope.
I. Activating Prior Knowledge
Stage:
▪ Platform where the
specimen slide is placed.
▪ Usually has clips to hold
the slide in place.

11. I. Activating Prior Knowledge
Short Review
Learners will identify the parts of compound microscope.
I. Activating Prior Knowledge
Diaphragm:
▪ Controls the amount of
light reaching the
specimen.
▪ Adjusts the size of the
opening to regulate
illumination.

12. I. Activating Prior Knowledge
Short Review
Learners will identify the parts of compound microscope.
I. Activating Prior Knowledge
Coarse Adjustment Knob:
▪ Moves the stage up and
down to focus the image
roughly.

13. I. Activating Prior Knowledge
Short Review
Learners will identify the parts of compound microscope.
I. Activating Prior Knowledge
Fine Adjustment Knob:
▪ Provides precise focusing
of the image.

14. 1. Identify the main parts of a compound
microscope and describe their functions.
2. Demonstrate the proper handling and
storing of a compound microscope.
3. Appreciate the compound microscope by
answering the reflection of learning.
B. Establishing Purpose of the Lesson
1. LESSON PURPOSE

15. B. Establishing Purpose of the Lesson
2. Unlocking Content Vocabulary: Match Type Activity
Resolution
Illumination
Stage
is the measure of the sharpness and
clarity of an image produced by the
microscope.
is the process of providing adequate, even, and
controlled lighting to the specimen under observation in
order to obtain a clear, high-contrast image.
is a flat, horizontal platform located below
the objective lens of the microscope,
where the specimen slide is placed and
secured for observation.
Magnification
is the process of enlarging the appearance of an
object or specimen when viewed through an
optical instrument.

16. C. Developing and Deepening Understanding
⮚ Microscope is an optical
instrument used to observe
small objects or details that are
not visible to the naked eye.
⮚ It uses lenses to magnify the
image of the object being
examined, allowing the user to
see it in greater detail.
Parts of a Microscope and their functions

17. C. Developing and Deepening Understanding
▪ Eyepiece (Ocular Lens): The
lens at the top of the
microscope that you look
through, usually with a
magnification of 10x or 15x.
▪ The eyepiece, also called the
ocular lens, is the lens closest
to the user's eye when looking
through a microscope.
Parts of a Microscope and their functions

18. C. Developing and Deepening Understanding
▪ Arm: The part of the microscope
that connects the base to the
head and the eyepiece tube. It is
used to carry the microscope.
▪ The arm is typically made of a
sturdy metal material to ensure
the microscope remains stable
and secure during use and
transport.
Parts of a Microscope and their functions

19. C. Developing and Deepening Understanding
▪ Stage Clips: Metal clips on the
stage that hold the slide in place.
▪ Stage clips come in different
designs, such as spring-loaded
clips or screw-down clips. They
provide a stable platform to keep
the specimen centered and
focused as the user examines it
through the microscope.
Parts of a Microscope and their functions

20. C. Developing and Deepening Understanding
▪ Coarse Adjustment Knob: A
larger knob used for focusing the
microscope. It moves the stage
or the body tube up and down to
bring the specimen into general
focus.
▪ Turning the coarse adjustment
knob moves the objective lens a
larger distance, allowing for
faster focusing.
Parts of a Microscope and their functions

21. C. Developing and Deepening Understanding
▪ Fine Adjustment Knob: A
smaller knob used for fine-tuning
the focus of the specimen after
using the coarse adjustment
knob. It moves the stage slightly
to sharpen the image.
▪ The fine adjustment is essential
for getting the most detailed, high-
resolution observation of the
sample under the microscope.
Parts of a Microscope and their functions

22. C. Developing and Deepening Understanding
▪ Draw Tube: The tube that connects
the eyepiece to the microscope
body.
▪ The draw tube is the cylindrical tube
that connects the eyepiece (ocular
lens) to the main body or frame of
the microscope. This is an important
component that enables the user to
optimize the performance and
viewing experience when using the
microscope.
Parts of a Microscope and their functions

23. C. Developing and Deepening Understanding
▪ Revolving Nosepiece: The part
that holds two or more objective
lenses and can be rotated to
easily change power
(magnification).
▪ The revolving nosepiece is a
crucial part of the microscope that
gives the user the ability to easily
change magnification levels
simply by rotating the nosepiece.
Parts of a Microscope and their functions

24. C. Developing and Deepening Understanding
▪ Objective: The lenses closest to
the specimen, that are typically of
varying magnifications (e.g., 4x,
10x, 40x, 100x).
▪ The different objective lenses
allow the user to view the
specimen at different levels of
magnification. The objective
lenses are the lenses closest to
the specimen being observed.
Parts of a Microscope and their functions

25. C. Developing and Deepening Understanding
▪ Stage: The flat platform where
the slide is placed for observation.
▪ The stage is a fundamental part of
the microscope that enables the
user to properly prepare, position,
and focus on the specimen they
wish to observe and study. It's a
critical component for getting
high-quality, detailed images
through the microscope.
Parts of a Microscope and their functions

26. C. Developing and Deepening Understanding
▪ Diaphragm (Iris): A rotating disk
under the stage with different
sized holes. It is used to vary the
intensity and size of the cone of
light that is projected upward into
the slide.
Parts of a Microscope and their functions
▪ Illuminator: A light source
located at the base of the
microscope.

27. C. Developing and Deepening Understanding
▪ Base: The bottom part of the
microscope that provides stability
and support. It houses the
illuminator and other electrical
components.
▪ The base is the foundation that the
rest of the microscope structure is
built upon. Its sturdy design helps
keep the microscope steady and
prevents it from tipping or moving
during use.
Parts of a Microscope and their functions

28. C. Developing and Deepening Understanding
A. Preparing a Wet Mount Slide
1. Placing the specimen
▪ Use a clean microscope slide
▪ Add a small drop of water or
mounting medium to the center of
the slide
▪ Carefully place the specimen (e.g.
plant tissue, cheek cells) into the
drop
Microscope Operation and Techniques

29. C. Developing and Deepening Understanding
A. Preparing a Wet Mount Slide
2. Adding a coverslip
▪ Gently lower a coverslip at a
45-degree angle onto the drop.
▪ Avoid trapping air bubbles
under the coverslip.
Microscope Operation and Techniques

30. C. Developing and Deepening Understanding
B. Adjusting the Focus
1. Using coarse and fine adjustment
knobs.
▪ Start with the lowest power objective
lens
▪ Use the coarse adjustment knob to
quickly bring the specimen into view
▪ Switch to the fine adjustment knob
to refine and sharpen the focus
Microscope Operation and Techniques

31. C. Developing and Deepening Understanding
B. Adjusting the Focus
2. Achieving optimal sharpness
▪ Observe the specimen and make
small, incremental turns of the fine
adjustment
▪ Continue adjusting until the image is
as clear and detailed as possible.
Microscope Operation and Techniques

32. C. Developing and Deepening Understanding
C. Controlling Illumination
1. Adjusting the light source brightness
▪ Use the diaphragm or light intensity
control to adjust the brightness
▪ Aim for even, consistent illumination
across the field of view
Microscope Operation and Techniques

33. C. Developing and Deepening Understanding
C. Controlling Illumination
2. Using the diaphragm or condenser
▪ The diaphragm controls the size of
the light beam.
▪ The condenser lens focuses the
light onto the specimen.
▪ Adjust these components to
optimize contrast and clarity
Microscope Operation and Techniques

34. D. MAKING GENERALIZATION
Reflection on Learning
One Minute Paper: Using
the graphic organizer,
reflect on your learning
by creating a
one-minute paper by
answering the questions.

35. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING
Labelling. Identify the parts of the microscope by writing your answer on
the blank provided.

36. E. EVALUATING LEARNING
E. EVALUATING LEARNING
E. EVALUATING LEARNING

37. Reference :
•SCIENCE 7 LESSON EXEMPLAR
Textbooks:
"Textbooks on microscopy or general biology:
"Microscopy and Histology" by Louie C. Kerr
"Fundamentals of Light Microscopy and Electronic Imaging" by Douglas B. Murphy
Scientific journals and publications:
"Microscopy and Microanalysis" (published by Cambridge University Press)
"Journal of Microscopy" (published by Wiley-Blackwell)
Educational websites and resources:
Microscope manufacturer websites (e.g. Leica, Nikon, Olympus)
Science education portals like Science Direct, Khan Academy, or Exploratorium
Government or academic institution resources:
Microscope operation guides from university biology departments
Instructional materials from science museums or national labs