2. A.Content Standards
The learners demonstrate understanding of how
energy is transformed
B.Performance Standards
The learners should be able to appreciate the
transformation of energy.
C.Learning Competencies
Demonstrate how sound, heat, light and electricity
can be transformed
16. ENGAGE
What is the source of energy
of the flashlight?
01
What energy is present in
the battery of the
flashlight?
Turn on the flashlight) What
energy is shown when the
flashlight was turned on?
02
03
MYSTERY BOX
03
03
How many energies were
displayed by the flashlight?
Which comes first light
energy or chemical energy?
18. ENGAGE
1. The caterpillar
transforms into butterfly.
A. Becomes the same
B. Crawl on the ground
C. Travel to other place
D. Change into other form
2. Plants uses photosynthesis to
make their own food from
sunlight.
A. copy of usually printed material
B. a picture made using a camera
C. process by which a plant uses the energy
from the light of the sun to make its own food
D. a brand name for a computer program that
allows you to make changes to a digital image
01
02
PRE-LABORATORY
ACTIVITIES
27. ENERGY
TRANSFORMATION
Energy is usually identified by the way it helps
you do work. You use electrical energy to turn on
the light and to listen to the news on your radio.
These activities make use of energy that is changed
from one form to another. Electrical energy enables
the bulb to light up and the radio to produce
sounds. These changes in the form of energy are
called energy transformations. Energy is never
destroyed in the process of transformation: it is
also NOT created. It only changes form one from one
to another
28. ENERGY
TRANSFORMATION
Ehe law of conservation of energy states that energy can neither be created nor destroyed - only converted from
one form of energy to another. This means that a system always has the same amount of energy, unless it's added
from the outside. This is particularly confusing in the case of non-conservative forces, where energy is
converted from mechanical energy into thermal energy, but the overall energy does remain the same. The only way
to use energy is to transform energy from one form to another.
The amount of energy in any system, then, is determined by the following equation:
• is the total internal energy of a system.
• is the initial internal energy of a system.
• is the work done by or on the system.
• is the heat added to, or removed from, the system.
It is also possible to determine the change in internal energy of the system using the equation:
This is also a statement of the first law of thermodynamics.
While these equations are extremely powerful, they can make it hard to see the power of the statement. The
takeaway message is that energy cannot be created from nothing. Society has to get energy from somewhere,
although there are many sneaky places to get it from (some sources are primary fuels and some sources are
primary energy flows).
Early in the 20th century, Einstein figured out that even mass is a form of energy (this is called mass-energy
equivalence). The amount of mass directly relates to the amount of energy, as determined by the most famous
formula in physics:
• is the amount of energy in an object or system.
• is the mass of the object or system.
• is the speed of light, roughly .
r
29. ELABORATE
Write numbers 1-3 on the space provided.
Alarm clock
_____Mechanical
_____Sound
_____Chemical
Washing Machine
_____Mechanical
_____Sound
_____Electrical
Flat Iron
____heat
____Electrical
31. EVALUATION
1. What is energy transformation?
A. When an energy has been created.
B. When an energy has been
destroyed.
C. Change of form to another form of
energy.
D. Change of form with the same form
of energy.
01
02
03
. From electrical energy, this energy takes place in the
television EXCEPT:
A. Chemical
B. Heat
C. Light
D. Sound
. You have notice that flashlight lighted after putting the
battery and switching it on. Which energy transformation occurs?
A. Chemical to light
B. Chemical to heat
C. Chemical to sound
D. Chemical to mechanical
32. EVALUATION How is energy changed when you pluck
the strings of guitar?
A. Light to heat energy
B. Chemical to sound energy
C. Mechanical to sound energy
D. Radiant to mechanical energy
.
04
05
5. Why is energy needed to be transformed into another form?
A. for the animals to multiply
B. to produce more equipment
C. so that plants & animals survive
D. It has to be changed into usable form
33. EXTEND
Look around your home. List
down some devices or appliances;
then describe the transformation
or change of energy from one
form to another. You may draw or
paste pictures in a short bond
paper.
As a student how can you help in
minimizing electrical energy
consumption in your own house?
01
02
