Science Lesson

1. SCIENCE 4
Changes that Materials Undergo
When Exposed to Certain
Conditions Such As Temperature

2. Most Essential Learning Competency
Describe changes in properties of
materials when exposed to certain
conditions such as temperature or
when mixed with other materials.
(S4MTIg-h-6)

3. Objective:
Describe what happens to
the material when heated
and cooled.

4. Review:
What are some ways of
changing the physical
appearance of solid materials?

5. bending pressing
hammering cutting

6. Read the sentence carefully.
Write TRUE if the statement is
correct and FALSE if it is not.
Write your answer in your
notebook.

7. 1. A hollow block changes its
size and shape when
hammered. True

8. 2. Chemical change happens
when solid materials are cut.
False

9. 3. A pillow does not change its
form when pressed.
True

10. 4. Rubber slippers change
their shape when bent.
True

11. 5. Solid materials change their
size, shape and texture when
hammered, pressed, bent and cut.
True

13. Today, you will
learn the changes
in the properties of
materials when
heated and cooled.

14. GUIDE QUESTIONS
1. What happened to the materials
when heated? Why?
2. How would you describe the change/s
that happened to the material/s when
heated?
3. How would you describe the change/s
that happened to the material when
cooled?

15. UNLOCKING OF DIFFICULT WORDS
Heat
Temperature
Melting
-is a form of energy that is
transferred between two substances
at different temperatures.
– is a measure of how hot or
cold an object.
-is a process that causes a
substance to change from a
solid to a liquid.

16. Let’s observe the following pictures

18. A melting ice cream
Why did the ice cream
melt?
The ice cream melt
because it was exposed to
a warmer temperature.
Yes, the ice cream
changed in form ( from
solid to liquid)
Is there any change in the
appearance of the material?

19. A lighted candle
 When you light
a candle, the heat of
the flame melts the
wax near the wick
then it turns the wax
into liquid. And after
some time, the wax get
cooled and turns into
solid.

20. The candle when
lighted or exposed to
high temperature
change in size, shape
and texture.

21. EXAMPLES

22. AdditionaI
Information

23. ACTIVITY

24. Put a check mark if the statement is
correct and cross mark if it is not
correct.
______1. Water turns to ice when put in
the freezer overnight.

25. Put a check mark if the statement is
correct and cross mark if it is not
correct.
_____2. Wet clothes can easily dry under
the sun.

26. Put a check mark if the statement is
correct and cross mark if it is not
correct.
______3. Some materials when heated melt
and change their size only.

27. Put a check mark if the statement is
correct and cross mark if it is not
correct.
______4. Materials that melt change its form
from solid to liquid.

28. Put a check mark if the statement is
correct and cross mark if it is not
correct.
______5. Butter melts when exposed to heat.

30. REMEMBER
THESE

31.  When the materials are heated, they
changed their size, shape and
texture.
 They also changed their forms.
When heated, the solid materials are
changed to liquid.

32.  When cooled, the liquid materials
are changed to solid.
 These changes are called physical
change.

33. FINAL
ACTIVITY

34. A. Read the situation then choose
the letter of the correct answer.
Write only the letter of your
answer on your paper.

35. 1. Which set of materials melted when
exposed to high temperature?
a. margarine, bananas, rocks
b. margarine, ice, wax
c. margarine, and a chocolate chip
d. gravel and sand

36. 2. What is melting?
a. a change from liquid to solid
b. a change of smell
c. change from solid to liquid
d. a change of amount of solute

37. 3. What causes objects to melt?
a. cold c. heat
b. sound d. stirring

38. 4. When solids reach their melting
points, they become what?
a. solid c. gas
b. liquid d. matter

39. 5. Which of these will happen to water
when placed in the freezer?
a. It boils. c. It becomes ice cream.
b. It becomes ice. d.Nothing happens

40. B. Supply the missing words to
make the idea correct.
Choose your answer from the
words inside the box.

41. When a solid material like (1)___________is
heated, it absorbs heat. The heat
absorbed/added causes the material to
change its form from (2)__________ to
(3)___________. The material also changed its
(4)__________ and (5)_______________when
heated.
solid size shape
candle liquid cooled

42. Let’s Check

43. 1. Which set of materials melted when
exposed to high temperature?
a. margarine, bananas, rocks
b. margarine, ice, wax
c. margarine, and a chocolate chip
d. gravel and sand

44. 2. What is melting?
a. a change from liquid to solid
b. a change of smell
c. change from solid to liquid
d. a change of amount of solute

45. 3. What causes objects to melt?
a. cold c. heat
b. sound d. stirring

46. 4. When solids reach their melting
points, they become what?
a. solid c. gas
b. liquid d. matter

47. 5. Which of these will happen to water
when placed in the freezer?
a. It boils. c. It becomes ice cream.
b. It becomes ice. d.Nothing happens

48. When a solid material like
(1)___________is heated, it absorbs heat.
The heat absorbed/added causes the
material to change its form from
(2)__________ to (3)___________. The
material also changed its (4)__________
and (5)_______________when heated.
butter
solid liquid
size
shape

52. Abutay, Lelani R., et al.2015.Science 4. DepEd
Complex Meralco Avenue, Pasig City: Department
of Education.
Abutay, Lelani R., et al.2015.Science 4 Teacher’s
Guide. DepEd Complex Meralco Avenue, Pasig
City: Department of Education.
References: