This document provides an overview of a webinar series on teaching science concepts related to light, sound, heat, and electricity for third grade students. It discusses key concepts such as light coming from natural and artificial sources, sound being produced by vibration, heat coming primarily from the sun, and electricity powering everyday devices. Examples of the uses of light, sound, heat, and electricity are also presented, along with safety tips for their proper use.

1. DIVISION WEBINAR SERIES ON SCIENCE
CONTENT AND TEACHING STRATEGIES
IN THE CONTEXT OF THE MOST ESSENTIAL
LEARNING COMPETENCIES (MELC) FOR
GRADE 3 - 3RD QUARTER

2. CONTENT STANDARD:
Apply knowledge of the sources
and uses of light, sound, heat and
electricity
TOPIC: LIGHT, SOUND,HEAT &
ELECTRICITY (3rd Quarter)

3. PERFORMANCE STANDARD:
Describe sources of light,
sound, heat and electricity.

4. Most Essential Learning
Competencies:
Describe the different uses of light,
sound, heat & electricity in everyday
life.

5. OVERVIEW
Light is a form of energy
that enables us to see all the
things around us.

6. OVERVIEW
Sound is another form
of energy produced by a
vibrating body.

7. OVERVIEW
Heat is a form of energy that
mainly comes from the
Sun. People, plants, and animals
use heat in different ways to
survive.

8. OVERVIEW
Electricity is a form of energy
that makes most appliances work.
Electricity may come from batteries
or from power stations.

9. SOURCES AND
USES OF LIGHT

10. Light helps us see the
beauty of God’s creation…
Plants
Animals
Human

11. SOURCES OF LIGHT
Natural Sources of Light
 These sources come to Earth through
natural means which man cannot control.
Artificial Sources of Light
 Artificial light comes from sources that man
produces and controls.

12. NATURAL SOURCES OF
LIGHT

13. SUN
The sun is a natural source of
light. It is also the primary source
of light. Earth gets light from the
sun.

14. MOON
The moonlight we see at night is
sunlight reflected from the surface of
the moon

15. MOON
The moonlight we see at night is
sunlight reflected from the surface
of the moon

16. STARS
The stars also light up the sky at
night. Some stars provide a very small
amount of light because they are very
far from us.

17. OTHER NATURAL SOURCES OF LIGHT

18. OTHER NATURAL SOURCESOF LIGHT

19. ARTIFICIAL SOURCES OF
LIGHT

20.  You see the world around you. Light helps
you play and work.
 You can see the colors of the traffic lights
to guide you when to stop, slow down, or
go.
 You can read newspapers, books, and even
email messages.
Uses of
Light

21. You can watch television programs
and movies, and play video games.
You can take pictures of your
friends using a camera.
Uses of Light

22. 1. Protect your eyes from too much
light.
2. If you are reading, use enough light.
3. Avoid looking directly at the sun or
at any bright source of light.
Proper and Safe Use
of Light at Home

23. 4. Inside the house, let the sunlight in.
5. Switch off any artificial light when nobody
is using it.
6. Do not put a lighted candle or alcohol or
gas
lamp near combustible objects.
7. Do not leave a lit candle or gas lamp
Proper and Safe Use
of Light at Home

24. Light comes from
the sun. It is the
primary source of
heat and light.
Key Concept

25. Light comes from
different sources
natural sources
and artificial
sources.
Key Concept

26. SOURCES AND
USES OF SOUND

27. Sound is created
when something vibrates and
sends waves of energy
(vibration) into our ears.

28. Sound can be produced by..
Plucking

29. Sound can be produced by..
Tapping an
object

30. Sound can be produced by..
Striking

31. VOLUME

32. PITCH

33.  Sirens and fire alarms produce sound
to warn people of danger and
emergencies.
Uses of Sound

34.  Some animals produce sound to attract
partners, warn other animals of
danger, and to communicate with each
other.
Uses of Sound

35. People use the sound of their voice
to share information with others, to
communicate with one another,
and to entertain people.
Uses of Sound

36. Musicians play musical
instruments to produce music.
Uses of Sound

37. Sound is produced by
vibrating objects.
Key Concept

38. Sound can be produced by
plucking, tapping, or striking an
object.
Key Concept

39. Sources and Uses
of Heat and
Electricity

40. Heat is a form of energy. It is the
result of the continuous motion
of small particles that compose all
matter.

41. SUN
Sources of Heat
The sun is our most
important source of heat. It
produces heat by nuclear
reaction.

42. EARTH
Sources of Heat
The earth itself contains
much heat deep inside.

43. Other Sources of Heat

44. 1. Heat is very important in our daily
lives. We need heat energy in many
different ways:
Uses of Heat
to cook our food
to dry our clothes
to boil water

45. 2. The heat from burning fuels in engines
makes cars, ships, and airplane run.
Uses of Heat
3. Heat is used to process foods,
iron, glass and many other
products.

46. 4. Heat plays an important role in
nature and the environment.
Uses of Heat
5. Human beings, plants and
animals need heat in order to
survive.

47.  The sun is the main source of heat.
People, plants and animals depend on it
to keep them warm.
Key Concepts
Other sources of heat are burning
woods, light bulbs, stoves, and other
electrical appliances. People use these in
doing their daily activities.

48. Electricity is one of the most
important forms of power and
energy that people use. It may
come from batteries
or an electric power plant or
power stations.

49. Fossil fuels (coal, natural gas, oil) are
burned to produce electricity.
Hydroelectric plants near waterfalls and
dams use water to run generators to
produce electricity.
SOURCES OF ELECTRICITY

50. Windmills use the force of the wind to
produce electricity.
Solar cells collect sun’s energy and convert it
to electrical energy.
Dry cells can also produce electricity.
Calculators and cellphone use electricity
from dry cells.
SOURCES OF ELECTRICITY

51. 1. If you see lighted candles and lamps which
are unattended or not used, put out the
flame.
Proper Use of Heat &
Electricity
2. Matches and candles must be kept in places
out of children’s reach.
3. Check if all the electric cords are properly
insulated.

52. 4. Unplug electrically operated appliances like
the stove and flat iron after each use.
Proper Use of Heat &
Electricity
5. Do not plug electrical appliances into an
outlet when your hands are wet.

53.  Electricity powers most of the things
we use in our daily activities.
Key Concept
 Safety measures should be practiced
when using heat and electricity to avoid
accidents.

54. “ Darkness cannot drive out
darkness, only light can do that.”
- Martin Luther King
Jr.

55.  DepEd, Most Learning Competencies 2020, Quarter 3
 Science 3, TG, pp 145-164
 Abracia, N.M., Joaban, G.B., Ramos, G.G., Science in
Our World, Vibal Publishing, pp.198-220
 Violeta, C.S, Ramos, E.A., The New Science Links,
Worktext in Science and Technology, REX Bookstore
Inc., pp. 251-280
 Google images
References