School Don Eulogio De Guzman Grade 7

Memorial National High Level

Pre-service Janica H. Estepa Subject SCIENCE

Teacher

Date & Time March 19, 2024 QUARTER 3RD

7:50 – 8:30 AM, 9:20 – 10:00
AM
and 10:40 - 11:20

I. MELC and  Describe the different types of charging processes (S7LT-IIIj-13)

Objectives
At the end of the 1 hour and 30 minutes lesson, the students must be
able to:

 describe the different charges;

 explain the different types of charging processes; and
 appreciate how the movement of electrons affects our daily lives.
II. Content/Subject Charges and the Different Charging Processes
Matter
III. Skills/Values  Independent Thinking
 Active Listening
 Critical Thinking
 Objectivity
 Curiosity
IV. Learning References:
Resources
 Byju’s. (2022, July 4). The charge can be generated by conduction or
induction or friction -. https://byjus.com/question-answer/the-charge-
can-be-generated-by-conduction-or-induction-or-friction/
 Byju’s. (2022, July 4). Write the comparison of the properties of
Electrons- Protons and Neutrons.
https://byjus.com/question-answer/compare-the-properties-of-electrons-
protons-and-neutrons/

 Science- Grade 7 Learner’s Material (pp. 262-276) First Edition

2017
Materials:

 Laptop  Chalk
 TV monitor  Printed Materials
 Science Grade 7 Learner’s  Balloon
Material
V. Procedures Teacher’s Activity Students’ Activity

PRELIMINARIES Good morning, class! Hello ma’am! Good morning.

Before we begin our class, can I ask
a student to kindly lead a prayer?

Yes, Jendrix? Dear Heavenly Father, as we

gather here today, we invite
Your presence into this
classroom. Lord, bless each
student here and our teacher as
we embark on another day of
learning. Please give us clear
minds and open hearts to grasp
the knowledge and lessons.
Once again, good morning!
Good morning, ma’am!
Before you sit, kindly pick up the
scattered papers or trash under your
(Arranged their chairs and
chairs and arrange them properly.
picked up the scattered papers
Thank you, class. You may now take or trashes.)
your seats.
 Thank you, ma’am.
Okay, class Secretary, is everybody
present today?

Good! So, how are you class? None, Ma’am.

Good to hear that! Are you ready for

another journey into the world of A little hard up, but we’re fine,
science? ma’am.

A. ELICIT
Yes, Ma’am!
Before starting our lesson, let me
test if you remember what we
discussed last week.

Are you ready?

How does heat transfer? Yes ma’am.

Yes, Mica?

Heat can be transferred in three

Very good! ways conduction, convection,
and radiation.
What are the differences between
the three (conduction, convection,
and radiation)?
Yes, Shiela?

Ma’am, conduction occurs more

readily in solids. Convection is
the movement that transfers
heat within fluids and air (gas).
Very good! In short, conduction is a Radiation is the transfer of
direct contact, convection is done energy by electromagnetic
through the motion of air and water, waves.
and radiation is transferred in the
form of electromagnetic waves,
including light.

Can you give me some examples of

conduction, convection, and
radiation methods of heat transfer?

Yes, Paolo?

An example of conduction is a
lizard warming its belly on a hot
rock.

Correct! An example of convection is a

hot air balloon.
Is it clear, class?
An example of radiation is fire.
All right, you are already
knowledgeable about your last topic
and ready to proceed with our next Yes ma’am.
topic.

Please settle yourselves now as we

move on to our engaging activity.

Are you ready?

Okay, let’s start.

We’re ready, ma’am.
B. ENGAGE and To spice up our discussion, I
EXPLORE prepared an engaging activity Okay ma’am
entitled “4 PICS IN 1 WORD.”

Are you all familiar with this game? Yes ma’am.

Mechanics of the game: Observe

four images related to our next
topic, select one word that ties these
visuals/ images together, and share
your chosen word in class.

Are my instructions clear, class? Yes ma’am.

Let’s start!

1.

Very good!

2.

Correct!

3.

Nice idea!

4.

Very good!

For the last picture,

5.

Very good! This activity will be your

guide and warm-up as we go along
with our discussion later.

Class, from our last activity, what do

you think is our topic for today?
 Yes, Mica? Ma’am, I think our topic for today
is all about electricity and
Okay! charges.
Class, our topic for today is all about
electricity and different charging
processes.

So, before we proceed with our

lesson proper, what are we expected
for today?

Kindly read our learning objectives

for today’s lesson.

Yes, Jianna?
At the end of the 1 hour and 30
minutes lesson, the students
must be able to:

 describe the different

charges;
 explain the different types of
charging processes; and
 appreciate how the
movement of electrons
Thank you for reading.
affects our daily lives.
Settle down the class as we go along
with our class discussion.

C. EXPLAIN We will process all your ideas as we

go through our lesson for today, so
listen and participate.

Let’s start.

Have you ever wondered what Yes, ma'am, these machines are
makes these machines, gadgets, and powered by electricity.
appliances work?

Very good! Electricity is also known

as electrical energy. This energy or
region is from the motion of charges.
An electric charge is an electrical
property of matter that creates a
force between objects.

But how do objects get charged?

Objects get charged using
Yes, Krishna? positive and negative particles
called electrons and protons
ma'am.
Very good! As you already know, all
matter is made of atoms. Electricity
originates inside an atom. An atom
consists of subatomic particles.

Based on the illustration, can you

state the three subatomic particles?

Yes, Mark? Ma'am, the three subatomic

particles are proton, electron,
Thats right! Who wants to describe and neutron.
the charge of each subatomic
particle?
Yes, Mica? A proton has a positive charge.
An electron has a negative
charge, and a neutron has no
electric charge.

Correct! Protons and neutrons are

tightly held in the nucleus of the
atom. Meanwhile, the electrons are
found on the outermost part of the
nucleus that’s why they can transfer
to objects.

Going back to my question earlier,

objects are charged by gaining or
losing electrons. For instance,
rubbing two different materials can
cause the transfer of electrons from
one object to another.

When electrons are transferred or an

object loses an electron, the objects
become positively charged.

How about when an object gains or

acquires electrons, the objects
become? It becomes negatively charged
ma'am.
Yes, Patricia?

That’s right! To add when an object

does not gain nor lose electrons, the
object has a neutral charge.

All charges follow the law of

conservation of charge. What do you
mean by this law again? The law of conservation of
charge states that charges
Yes, Raiden?
cannot be created nor destroyed
but can be transferred from one
material to another ma'am.

Very good! When we rub two objects

from each other, they become
electrically charged. As stated, a
while ago, an object can be
positively charged, negatively
charged, or neutrally charged.

When charged particles come near

each other, there exists a force
between them.

A positively charged object

Can you describe the picture? repels another positively
charged object, and a negatively
charged object repels another
Yes, Lyra? negatively charged object. In
short, opposite charges attract
and like charges, repel.

Very good! This force can be a force

of attraction or a force of repulsion. A
force of attraction is a force that Yes ma’am.
pulls objects together. At the same
time, repulsion is a force that tends
to separate two objects. This is also
called the magnet rule.

Are we clear?

Let us now talk about the different

charging processes.

These are charging by friction,

conduction, and induction
ma’am.

From this picture, what are the three

types of charging processes?

Let us first take a look at charging by

friction.

Charging by friction can occur by

rubbing two different materials.
When objects are rubbed against
each other, the electrons from the
surface of one of the objects move to
the surface of the other. This gives a
positive charge to one substance and
a negative charge to the other.

A good example that demonstrates

charging by friction is rubbing a
balloon into the hair.

When the balloon is rubbed into

her hair, the balloon becomes
negatively charged due to
Who wants to explain the transfer of
excess electrons. Meanwhile, the
electricity in this picture?
hair becomes positively charged.
Yes, Anne? Moving the balloon close to the
hair makes the hair stand up
because the oppositely charged
objects are attracted.

Very good! We don’t know ma’am.

But how would you know if an object

will either gain or lose electrons?
Which one becomes positively
charged and which one becomes
negatively charged?

To predict this, we can use the

Triboelectric series.

The Triboelectric series is an

arrangement of materials or
substances according to their ability
to gain or lose electrons, materials
that are placed at the upper end of
the sequence will most likely give up
or lose electrons and become
positively charged. On the other
hand, materials found at the end of
the sequence gain electrons and
become negatively charged. The
strength of the electric force
between objects depends on the
distance between them. Ma’am, the farther the materials
are from each other in the series,
Class, what do you mean when you the stronger the electrical force
say the strength of the electric force of attraction.
between objects depends on the
distance between them?

Yes, Pauleen? Yes, ma’am.

Very good!

Are we clear about the charging by

friction?

The next process is charging by

conduction.

Charging by conduction happens

when electrons are transferred from
one material to another by direct
contact. It involves the direct
physical contact of a charged object
to a neutral object.

(No response)

Look at this example. We have here

a negatively charged rod and a
metal sphere that is neutrally
charged. Ma’am, it is called conductors.

What happened to the charge of the

metal sphere after the rod was in
contact with it?
Okay, it became negatively charged
during conduction. The same charge
is created in the neutral object. Some of these metals are silver,
copper, and aluminum. The best
Materials that allow electrons to flow conductor is silver.
freely are called? Yes, Arvin?

Very good! Metals are good

conductors of electric charge.

Can you give me examples of Ma’am, it is called insulators.

conductors?

Examples are glass, wood,

diamond, oil, and hard rubber
ma’am.

That’s right! On the other hand,

materials that do not allow electrons
to easily flow through them are
called?

Nice idea! Can you give me

examples of insulators?

Good! This is the reason why electric

wires have rubber coating to prevent
electricity from flowing directly to
our hands, and to prevent electric
shock.

The last type of charging process is

called induction.

Charging by induction is a charging

process where an object can be
charged without actual contact with
any other charged object. You can
induce a charge in a neutral object
by moving a charged object close to
it. Induction creates a temporary and
opposite charge in that other object Ma’am, the electrons move on
with no contact. the other side of the metal
sphere.
Observe this picture. What happens
to the electrons of the metal sphere
when the negatively charged rod is
brought near to it?

Ma’am, because the rod has

Yes, Joshua? negatively charged particles or
electrons. That is why it repelled
Correct! The side that is closest to the electrons of the metal
the rod becomes positively charged, sphere.
but this charge is temporary. It is
temporary because electrons did not
transfer to or from the object charge.

Why do electrons of the metal

 sphere move on the other side or
away from the rod?

Yes, Julie?
None, ma’am.

That’s right! Remember, like charges

repel and unlike charges attract. Okay, ma’am.

And those are the different types of

charging processes.

So, after we discussed charges and

different types of charging
processes, do you have any
clarification or questions?

It's good to hear that. Settle

yourselves as we dig deeper into
your understanding of today's topic.

D. ELABORATE To spice up our discussion, I want Okay, ma’am.

you to focus on our last activity
which is entitled, “Correct Me If You
Care!” to further elaborate on the
different types of charging processes
in our daily lives.

I’ve prepared a table here with three (Students are listening to the
columns for conduction, induction, instructions)
and friction. You will place the
pictures in the appropriate column
based on the type of charging
process depicted in each picture.
We’re ready ma’am.
Are you ready?

Let’s start!

(After 6 students answered on the

board)

Settle down class, let’s check if you

put all the images in their
corresponding places.

(After checking their answers)

Very good, class. You already know

the different types of charging
processes and their examples in our
 daily lives.

Class, I have a question, how do

different charging processes, like
conduction and induction, benefit our Various types of charging, which
daily lives and contribute to the ease include conduction and
and advancement of technology? induction, help to make the
recharging process of our
Yes, John? devices more convenient.

Very good!
Conduction allows the fast and
What else? reliable transfer of power
through direct contact, and
Yes, Miya? induction promotes wireless
charging procedures. As a result,
the life of modern people and
their reliance on technology are
supported by the appropriate
methods.

Brilliant answer! All your answers

are about the importance of different
Yes ma’am.
types of charging processes.

Are we clear now class?

No ma’am.
Do you have any questions or
clarifications about our topic for
Okay, ma’am.
today?

Okay, let’s proceed to your self-

check to assess if you understood
our topic for today.

E. EVALUATE Let’s have your self-check to assess

if you understand our topic for today
by answering these questions. Bring
out ½ crosswise and keep all your
(Students are listening)
notes and cell phones. All I need to
see in your desks are ballpens and ½
crosswise. You have 7 minutes to
accomplish your self-check. Your
self-check is equivalent to 10 pts.
Yes ma’am.
Are my instructions clear, class?

Directions: Read each item carefully,

then write the LETTER with the
correct answer on your paper.

___1. Which of the following is an

example of a conductor?
A. copper B. rubber
C. glass D. wood
___2. What law states that charges
are neither created nor destroyed
but only transferred from one
material to another?
A. Electrostatic Law
B. Kirchhoff’s Law
C. Law of Charges
D. Law of Conservation on Charge
____3. How will you describe the
circuit when you turn the switch to
the off position? (Students answered their self-
 A. closed B. negative check quietly)
C. open D. overload
____4. Which of the following briefly
summarizes the law of electric
charges?
A. Charges always attract. KEY ANSWERS:
B. Charges always repel.
C. Charges that are opposite in MULTIPLE CHOICE:
nature attract; Charges that are the
same in nature repel. 1. A
D. Charges that are opposite in 2. D
nature repel; Charges that are the
same in nature attract. 3. A
____5. If you comb your hair and the
comb becomes positively charged, 4. C
what will happen to your hair? It will
____________________. 5. A
A. become negatively charged 6. D
B. become positively charged
C. be repelled by the comb 7. B
D. remain unchanged
____6. What will happen when two 8. C
like charges are brought together?
9. B
They will_______.
A. attract each other 10. D
B. do not affect each other
C. neutralize each other
D. repel each other
____7. When can a material become
positively charged?
A. by gaining electrons
B. by gaining protons
C. by losing electrons
D. by losing protons
____8. Which of the following is an
insulator?
A. aluminum foil
B. mechanical pencil
C. plastic bag
D. silver necklace
____9. What do you call the method
of charging an object by rubbing it
against another object? It is called
charging by____________.
A. conduction B. friction
C. induction D. static
discharge
____10. What energy transformation
occurs when the flashlight is on?
A. chemical→ electrical→ light
B. chemical→ magnetic→ light
C. heat → magnetic→ light (Students passed their self-check
D. mechanical→ electrical→ light in front quietly)

(After 7 minutes)
Okay, ma’am.
Okay, class, finish or not finish, pass
your paper in front, and I will be the
one who will check your self-check.

Let’s now proceed with your

assignment.

F. EXTEND Instructions: For your assignment,

you are tasked to illustrate different
methods of charging objects, such as
friction, conduction, and induction. (Students listening to the
Show the transfer of charges directions and rubric of their
between objects in each scenario. Be
 sure to include any accompanying assignments)
explanations or descriptions as
needed in not more than 3
sentences. You can pass your
assignments on to our next meeting.
Your assignment is equivalent to 16
points.

Here are the criteria for your drawing

homework.

Is it clear, class? Yes ma’am.

Do you have any questions or None ma’am.

clarifications?

If none, let’s call it a day. Goodbye Goodbye and thank you, ma’am.
and thank you, Grade 7.
VI. Remarks Number of Students Within Mastery
Level

Number of Students Needing

Remediation/Enrichment

VI. Reflection/
Journal

Prepared by:

JANICA H. ESTEPA
Pre-service Teacher’s Signature Over Printed
Name

Checked by:

CHRISTOPHER S. DE GUZMAN DANIEL E. FUNESTO

Cooperating Teacher’s Signature Over Printed Cooperating Teacher’s Signature Over Printed
Name Name