Changes in Materials

1. Science V
Ms. Apple R. Sanchez

2. How do different
materials change?
Tell how the
materials undergo a
change:

4. Observe the pictures.
Tell something about it.

5. Let us watch this!

6. Process questions:
1. What changes was mentioned in
the video? What happens to the
object when cut? When crumpled?
When teared? making sand castles?
carving of wood,? boiling of water?
2. Did it change in size? Shape?
3. What happened to the trunk of a
tree when cut into pieces of
lumber?
4. Is there a change? What changes
have you noticed?

7. Material Observe Before
Slicing
After
Slicing
Guava
size
shape
color
odor
Activity 2: Perform the following activities
by group:
1 – Observe a real fruit (Guava, avocado or
any fruit available) Record your observation
using the table:
Is there a difference on the fruit before and after slicing?
What change is involved? Why?

8. Material Observe Before
Crumpling
After
Crumpling
Dried
leaves
size
shape
color
odor
2 – Observe some dried leaves.
Crumple the leaves. Record your
observations using the table:
Is there a difference on the fruit before and after
slicing?
What change is involved? Why?

9. Material Observe Before
Pounding
After
Pounding
chalk
size
shape
color
odor
3- Observe a piece of chalk. Using a stone
or hammer, pound or pulverize it. Record
your observation using the table:
Is there a difference on the chalk before and after
pounding or pulverizing it?
What change is involved? Why?

10. Material Observe Before
Bending
After
Bending
wire
size
shape
color
odor
4- Observe a wire. Bend the wire and form
different shapes. Record your observations
and compare the result of bending using the
table:
Is there a difference on the wire before and after
bending?
What change is involved? Why

11. Reporting

12. a. What are some of the
physical changes observed
in the activity?
b. Were the changes that
happened similar to all the
materials? Why?
c. Name some physical
change that may take place
in a piece of wood?

13. Physical change takes place
in materials when they undergo
changes in size, shape, and state
but not its kind or composition
under certain activities or
conditions like, cutting, tearing,
melting , pounding, bending
breaking, crumpling, etc. It may
appear different but it is still
the same inside.

14. Activity 3- Light a candle.
Observe the wax of a candle
while it is lighted.
a. What happens to the wax? Now,
blow off the light of a candle.
b. What happens to the wax as it
cools?. Light the candle again,
c. What happens to the wax again?
What change is involved here?
Why?

15. Carlo uses a remodeled
“hand-me-down” uniform
from his kuya. He doesn’t
go to school because his
uniform is not new.
Is this a right attitude?
Why? If you were Carlo
what will you do?

16. Directions: Read and choose the letter of the correct answer:
____1. Melting of ice is a physical change? Why?
a. Yes because it undergo a change in size and shape.
b. No, because it changed from solid to liquid.
c. Yes, because it changed in composition.
d. No, because there is a change in state.
____2. Which of the following activities is a physical change?
a. Carving of wood c. Making wood into a chair
b. Burning of wood d. both a and c
____3. Mother swept in the yard and collected so many dried leaves which
appeared to be a bulk of garbage. Which of the following activity did
mother do that involved physical change?
a. Burned the dried leaves to repel mosquitos.
b. Pulverized the leaves and placed on her flower pots.
c. Boiled the dried leaves to make a liquid disinfectant for
wounds.
d. All of the above
____4. All of the following conditions or activities involves a physical
change EXCEPT--- a. burning a piece of paper c. melting of
candle wax
b. slicing of apple into portions d. bending of iron grills to make
designs.
____5. How will you make a physical change from a piece of cloth?
a. By tearing it c. By folding it
b. By cutting it d. All of the above.

17. Assignment:
1. Name at least 3 physical
changes that happen in the
home or school.
2. When physical change occur
in matter, is there a new
product formed? Why?