WEEK 4 Day 1
Investigating
Changes That
Happen In Materials
Due To Application
Of Heat
Based from : Science Exemplar of Science
PRECILAWriting
R. UMALI TeamJose Zavalla Memorial E/S
Batangas
JUNRIEL L. DAUG
BUGWAK ELEMENTARY SCHOOL
Engageme
nt
Distribute the pieces of scratch paper
to the class. Ask them to manipulate
it to show physical change through:
 Folding
 Cutting
 Crumpling
 Tearing
Engageme
nt
Perform a simple demonstration of
burning paper.
Note: Collect the papers after the activity.
Engageme
nt
1.What happened to the scratch paper?
2.What changes did you observe?
3.Can you return the ash into a scratch
paper?
4.Why or Why not?
Exploratio
n
Predict what will happen if we heat white
sugar in a pot. Fill up the chart below.
What happen to the sugar inside the pot when
heated?
What I know What I want to
What I
Know
learned
Exploration
Activity
What you need:
2 tablespoons of white/refined sugar
pot spoon,Stove/alcohol lamp/candle
Procedure:
1. Pour 2 tablespoons of sugar in a pot.
2. Turn on the stove and heat the sugar in low fire.
Caution: Be very careful when heating the sugar. The
teacher may assist on this part. Do not taste it.
3. Observe what happened.
4. Turn off the stove when the sugar is about to
melt.
5. Record your observations on the chart below.
Exploratio
Activity
n
Characteristics Before Heating After Heating
color
state/phase
odor
Explanation
Group Reporting
1.Did the sugar change its color?
Describe it.
2. Did its phase change?
3. What are the indications that the
sugar really underwent chemical
change?
4. Is there a new product formed?
5. What were the changes that occur in
sugar due to application of heat?
6. Are your predictions correct?
Elaboration
1.What is chemical change?
2.What are the indications of chemical
change?
A chemical change occurs to
materials when heat is applied.
Change in color, taste and odor,
production of smoke, ash, bubbles,
fire, new products and even heat
are the indications of chemical
change.
Elaboration
1.Is formation of bubbles
indication of chemical change?
an
2. When burning a paper, what are
the new products formed?
Evaluation
Write the letter of the correct answer
1. Aling Maring burns leaves early in the morning in their
backyard. Which of the following is the indication that
material formed into new form when heat is applied on it?
A.ash
C. heat
B. fire
D. smoke
Evaluation
Write the letter of the correct answer
2. Which of the following procedures in cooking
banana cue involves chemical change?
A. peeling the bananas
B. melting the sugar
C. putting the bananas on the sticks
D. selling the banana cue
Evaluation
Write the letter of the correct answer
3.Ash is a new substance formed when ________.
A. pyrite comes into contact with acid.
B. food is digested.
C. a fruit turns moldy.
D. wood is formed.
Evaluation
Write the letter of the correct answer
4. Which of the following activities showed
chemical change due to application of heat?
A. pancake making
B. cutting of wood
C. straightening of hair
D. rusting of nail
Evaluation
Write the letter of the correct answer
5. Which of the following is NOT an indication of
chemical change due to application of heat?
A. change in color
B. change in odor
C. change in taste
D. change in size
Thank You!
WEEK 4 Day 2
Signs When Materials
Undergo Physical And
Chemical Change
Due To Presence/Lack
of Oxygen
Based from : Science Exemplar of
Batangas
PRECILA R. UMALI
Jose Zavalla Writing
Memorial E/S
Science
Team-
JUNRIEL L. DAUG
BUGWAK ELEMENTARY SCHOOL
Engageme
Identify the materials that undergoes
nt as shown
change
chemical
Engageme
Identify the materials that undergoes
nt as shown
change
chemical
Engageme
Identify the materials that undergoes
nt as shown
change
Photosynthesis
chemical
Ripening of fruit
Exploratio
Activity
n : Give Me the Signs
What you need:






candle
candle holder
matchstick
glass
apple
bowl of water
Exploratio
Activity
n : Give Me the Signs
What to do:
1. Put the candle in a candle holder.
2. Light up the candle. After a minute, observe
the physical and chemical changes that happen
to the candle when air is present.
3. Cover the lighted candle with a glass.
4. Observe what happened to the candle after
covering it with a glass.
5. Slice the apple into halves.
6. Expose the first half of the apple into the air
for few minutes
7. Soak the other first half in a bowl of water
Exploratio
Recording the observation
n
Material
lighted candle
sliced apple
Change that Happen
to Material When
Oxygen is Present
(lighted candle
uncovered; sliced
apple exposed to air)
Change Happen to
Material When
Oxygen is absent
(lighted candle
covered; sliced apple
soaked in water)
Explanatio
Guide Questions
n
1.What have you observed from the burning candle when it is
uncovered and covered?
2. What helped the candle continue burning? Explain your
answer
3. What changes took place in the candle?
4. What happened to the sliced apple exposed to the air and
soaked in water?
5. What changes took place in both of the halves of the sliced
apple?
6. What physical change(s) occurred?
7. What chemical change(s) occurred?
8. What condition contributed to these changes?
9. Have you observed rusting of iron window grills, why do you
think this change occur?
10. To what elements are iron window grills exposed to?
11. What do you think are the reasons of rusting?
Elaboratio
n
 Can you enumerate signs when
materials undergo physical and
chemical change due presence of
oxygen?
 How about the signs when
materials undergo changes due
to lack of oxygen?
Elaboratio
n
Materials undergo chemical change in different
ways. During the change process, one or more new
materials with different compositions can be
formed. For the chemical reaction to happen heat
energy or other substances are needed to break
the bonds of molecules. The speed rate of
chemical reaction in different materials depend on
temperature, presence of light, pressure, and
presence of catalyst, and electricity.
Evaluatio
n
Identify
the sign when materials
undergo change in each of the
following situation below:
1. Aling Juana is a banana cue vendor.
One time, she asked her daughter to
help her peel the banana. It took them
an hour to finish the task. She found
out that all the peeled banana on the
plastic tray turned into brown.
Evaluatio
n
2. Father found a dead rat inside the
stock room. The decomposed body of
the rat produced unpleasant odor. He
disposed it by burying the remains into
the soil.
3. Yaya Meling left the glass of bottle of
milk on the table. The next morning
she found out that there were bubbles
formed.
Evaluatio
n
4.Gelyn went to Baguio for a vacation.
She forgot to place her plants outside
the garden. When she came back the
plants were wilted.
5.Leftover soup was placed on a
container for two days on the table.
Bubbles formed because it is already
spoiled.
Assignme
nt
Answer the following questions:
1.Aside from camote, what other
foods turns brown when exposed
to air?
2.What will you do to leftover
foods to avoid spoilage?
Thank You!
WEEK 4 Day 3
LESSON 18
Signs When Materials
Undergo Physical And
Chemical Change
Due To Application of
Heat
Based from : Science Exemplar of
Batangas
PRECILA R. UMALI
Science
TeamJose ZavallaWriting
Memorial E/S
JUNRIEL L. DAUG
BUGWAK ELEMENTARY SCHOOL
Analyze each picture. Tell whether the change shown is
physical or chemical change then enumerate the signs of
change.
1.
2.
Analyze each picture. Tell whether the change shown is
physical or chemical change then enumerate the signs of
change.
3.
4.
Analyze each picture. Tell whether the change shown is
physical or chemical change then enumerate the signs of
change.
5.
6.
Analyze each picture. Tell whether the change shown is
physical or chemical change then enumerate the signs of
change.
7.
8.
Analyze each picture. Tell whether the change shown is
physical or chemical change then enumerate the signs of
change.
9.
10.
Analyze each picture. Tell whether the change shown is
physical or chemical change then enumerate the signs of
change.
11.
Arrange the jumbled letters to form the words which we will use in out
activity later. The meaning of the words serves as your clue
1.OUBTSINCOIN
- igniting or fire
2.ERETUTMEPRA
- hotness or coldness
3.OOTS
- dirt
4.PERISPIATTE
- to become separated from a liquid
5.EVERRISLEB
– able to be changed back to original form
Activity
Group activities
Materials undergo change due to application of heat
Problem: What are the signs of physical and
chemical change due to application of heat?
Materials:
worksheet, matchstick, candles, empty tin can, ice,
holder
Procedure:
1. Light a matchstick until the half of the stick is
burned. Observe what happens.
2. Light a candle. Using a holder, place an empty tin
can over the flame of the candle. Notice what is
formed at the bottom of the can.
3. Go outside. Put an ice anywhere. Leave it for 5
minutes. Observe what happens.
Materials
Matchstick
Burning
candle and
tin can
Ice
What
causes
the
materials
to
change?
What is
produce
d?
What are
the signs
that the
materials
undergo
change?
Can it be
brought
back to
its
original
form?
REPORTING
1.What caused the materials to change?
2.What happened to the matchstick when rubbed on a rough surface?
3. What made the material continue burning?
4. Was there an energy released while the matchstick
is burning?
5. What energy was released?
6. Is there a new material formed? Can it be brought
back to its original form?
7.What was formed at the bottom of the can?
8. What changes happened to the candle?
9. Can it be brought back to its original form?
10. How would you describe the ice before placing outside?
11. What happened to the ice after placing outside?
12. Was there a change in taste and color?
13. What change took place? Can it be brought back to its original
form?
What are the signs of physical and chemical
change when heat is applied?
Physical change
Chemical change
When a matchstick is rubbed against a
rough surface, friction is produced. The
matchstick is kindled. Its color changes
into black. Smoke, heat and ashes are
produced. These are new substances
formed
during
combustion.
They
become irreversible. Soot or dirt is
formed under the can when it is placed
over the lighted candle. Heat is also
transferred through conduction. Both
the burned matchstick and ash on the
heated tin can are products of chemical
change.
In placing the ice outside, its solid
phase and shape becomes liquid. But no
new material is formed. It is physical
change.
When heat is applied to materials that
undergo physical change, they change
in
shape,
texture,
phase
and
temperature. On the other hand, when
heat is applied to materials that
undergo chemical change, color, odor
and temperature also change.
Identify the signs of change that are evident in
each picture
1.Rough wood
Identify the signs of change that are evident in
each picture
2.Finished wood
Identify the signs of change that are evident in
each picture
3.Painting a car
Identify the signs of change that are evident in
each picture
4.Hot pan
Identify the signs of change that are evident in
each picture
5.Lighting a fireworks
Draw pictures that
exhibits
signs
of
physical and chemical
change.
WEEK 4 Day 4
LESSON 19
When Materials
Become Harmful
To The
Environment
Based from :
Science Exemplar of Science Writing TeamBatangas
JUNRIEL L. DAUG
BUGWAK ELEMENTARY SCHOOL
Engagement
Arrange the jumbled phrase to form the science
ideas. Paste your work on the manila paper.
where a
new
substance
Chemical Change
is a change in
the
composition
may be formed.
and
characteristic
of matter
Engagement
Let’s check it.
Chemical Change is a change in the composition
and characteristic of matter
where a new substance
may be formed.
Engagement
Arrange the jumbled phrase to form the science
ideas. Paste your work on the manila paper.
is a change
only in the
state of
matter and
is formed.
no new
material
Physical
Change .
Engagement
Let’s check it.
Physical Change is a change only in the
state of matter and no new material
is formed.
Engagement
FACT OR BLUFF
1. Liquid freezes into solid such that you
can hold water. FACT
2. Due to physical change, the sweet
sugar may turn sour or bitter. BLUFF
3. To dry clothes, liquid evaporates into
gas called water vapor. FACT
4. There is no new substance formed
when carbon dioxide and water become
food in the plant. BLUFF
5. Melting of candle is a change from
solid to liquid. FACT
Exploration
Activity
Where do I belong?
Problem:
Which situations show chemical change and physical
change?
Materials:
table, chart
Procedure:
1.Study the following situations. Classify in the proper table.
2.Classify changes that occur as to physical and chemical
changes
Exploration
Activity
Where do I belong?
a. stretching a rubber band without breaking it.
b. vegetable infected with pests.
c. tissue paper being burned.
d. breaking barbecue stick into 3 pieces.
e. cutting a sheet of cardboard into 4.
f. combining ammonia and vinegar.
g. smoke produced while heating the sugar.
h. food left outside the refrigerator gets spoiled.
i. pounding a teaspoon of peanuts.
j. bending a piece of wire to form a circle.
Explanation
Activity
Record your answers in the table/chart below
Physical Change
Chemical Change
Elaboration
What is physical change?
What is chemical change?
Evaluation
Classify the following changes in materials as to
chemical or physical.
___1. Fruit juice becomes alcoholic drinks.
___2. A liquid turns into gas when it is heated.
___3. Banana turns sweet.
___4. Mother bakes your favorite cookies.
___5. Plastics and nylon stockings are made from
organic material
Thank You!
WEEK 4 Day 5
LESSON 20
Specific Changes
That Occur As To
Physical And
Chemical Change
Based from :
Science Exemplar of Science Writing TeamBatangas
JUNRIEL L. DAUG
BUGWAK ELEMENTARY SCHOOL
Engagement
Write “P” for Physical or a “C” for Chemical, to
indicate the type of change that is taking place.
_____1. digestion of food
_____ 2. cutting of wood
_____ 3. melting of butter
_____ 4. ripening of fruits
_____ 5. water evaporating
Exploration
What are the specific changes manifested by the
materials during physical and chemical change?
Physical Change
Melting
Freezing
Evaporation
Condensation
Sublimation
Deposition
(solid to liquid)
(liquid to solid)
(liquid to gas)
(gas to liquid)
(solid to gas)
(gas to solid)
Exploration
What are the specific changes manifested by the
materials during physical and chemical change?
Chemical Change
Change in taste
Change in color
Change in odor
Precipitation
Effervescence or the formation of bubbles
Exothermic and endothermic reactions
Explanation
Physical Change
Melting(solid to liquid)
is a physical process that results in the
phase transition of a substance from a
solid to liquid
Freezing (liquid to solid)
is a phase transition in which a liquid
turns into a solid when its temperature
is lowered below its freezing point.
Explanation
Physical Change
Vaporization (liquid to gas)
is a type of vaporization of liquid into
a gaseous phase that is not saturated
with the evaporating substance. The
other type of vaporization is boiling,
which is characterized by bubbles of
saturated vapor forming in the liquid
phase
Condensation (gas to liquid)
is the change of water from its gaseous
form (water vapor) into liquid water.
Generally occurs in the atmosphere
when warm air rises, cools and looses
its capacity to hold water vapor.
Explanation
Physical Change
Sublimation (solid to gas)
is the transition of a substance
directly from the solid to the gas
phase without passing through the
intermediate liquid phase.
Deposition (gas to solid)
is the process in which gas transforms
into solid.
Explanation
Chemical Change
Change in color
is tarnishing, rushing, and bleaching
are example of changes in color that
are indicative of chemical changes.
Change in odor
is putrefaction or decay of organic
matter, a chemical change, is often
accompanied by the formation of foul
smell. Any changes in odor is almost
always an indication of chemical
change.
Explanation
Chemical Change
Change in taste
is the souring of milk and other
edible substances are also an
indication of chemical change.
Effervescence or the formation
of bubbles
is the formation of bubbles from
leaves of water plants is an
indication of photosynthesis, a
chemical change. The action of
acids on metals and carbonates is
also a chemical change that is
characterized by effervescence.
Explanation
Chemical Change
Precipitation
is the formation of insoluble
particles of solid may result from a
chemical
change.
The
cloudy
suspension that results from the
action or carbon dioxide on
limewater is a chemical change
Exothermic and endothermic
reaction
is the loss or gain of heat in most
changes is often an indication of a
chemical change.
Elaboration
1. What are the specific changes manifested
by the materials during physical change?
2. What are the specific changes manifested
also by the materials during chemical
change?
Evaluation
Below is a list of changes in matter. Under the
Physical Change or Chemical Change. Identify the
specific change column write PC if the material
underwent Physical Change and CC if Chemical
Change the occurs in each of the items listed.
Process/Change
1. Cloud Formation
2. Make food flavor
3. Drying Clothes
4. Making ice cream
5. Rusting of roof
Physical
Change/Chemical
Change
Specific Change
Assignment
Answer the following questions.
1.What benefit can people can from
the following situations?
a. Evaporation of water
b. Burning of wood
c. Water into ice
d. Solidified ice cream
Thank You!