for reference

2. Using the pictures below, identify what actions should be
done to change the size and shape of the given materials in
the pictures. Select your answers from the group of words
found inside the box.

3. Using the pictures below, identify what actions should be
done to change the size and shape of the given materials in
the pictures. Select your answers from the group of words
found inside the box.

10. At constant pressure, the
state of materials depends on
the temperature by which
they are exposed. The ice
cube or the solid phase of
water will melt if taken out of
a freezer and stayed long at
room temperature.

11. The water that boils turned into gas or vapor that
comes out of the kettle if left at high temperature for
too long.

12. Temperature is the measurement of the amount of
heat energy present in the surroundings. There is an
exchange of heat between the substance and the
surroundings. This means that heat can be absorbed by
the materials or can be released by the materials. When
the heat is absorbed by the materials, the temperature
will increase, thus the material is hot. If heat is removed
or released by the materials, temperature will decrease,
thus it is cold.

13. Generally, an increase in the temperature turns solids
into liquids (melting), liquid to solid (freezing), liquid into
gases (evaporation), solid into gas (sublimation), and boils
water at certain point (boiling ).

14. When materials reached its melting point, solid
materials changed into liquid. The temperature at which
the liquid will change back to solid is called its freezing
point.
• The melting point of ice is 0°C, this is also the
freeing point of water.
• The boiling point, or the temperature at whichwater
boils, and turned into gas is 100 °C .

17. 1. Observe the properties of the samples before
heating.
2. Crush the materials (candle and/or crayons) and put
it in a spoon.
3. Using a match stick, light the candle and heat the
spoon containing the crushed materials. (Use pot
holder to hold the spoon while heating).

18. 4. Observe what happens to the lighted candle.
5. Put off the lighted candle carefully by blowing air
on it.
6. Let the heated material (s) stand for 2-3 minutes.

19. • What happens to the crayon and candle when
heated?
• Is there a change in appearance of the material?
What change took place?
• How would you describe the change/s that
happened to the material when heated?
• what happens to the material when cooled?

20. 5. Is there a change in the appearance of the
material?
6. How would you describe the change/s that happened
to the material when cooled?
7. Describe the change in the properties of the
material when they are heated and cooled?

21. Crayon after heating Crayon after cooling

22. Candle after heating Candle after cooling

23. Properties of materials when exposed to different
temperatures
• When materials are heated, they change in size, shape,
form and texture. There is an increase in the temperature.
• When heated, they change from solid to liquid. The
materials melt.
• When cooled, they change from liquid to solid. The
materials return to its solid form again. There is a decrease
in temperature.

24. Underline the appropriate word that will make the
statement correct.
1. Water when placed inside the freezer will
become (solid, liquid, gas).
2. Fat when placed on top of a hot pan (will change,
will not change) in shape and size.
3. Melted crayon when cooled will become (soft,
hard, gas).

25. 4. The butter will (harden, melt, remain the
same) when heated.
5. Soft drinks when placed inside the freezer
will become (solid, liquid, gas).
6. Floor wax when placed inside the heated can
will become (solid, liquid, gas).

26. 7. Mico heated the chocolate bar to make a
chocolate syrup. Which of the following best
describes what changes happened to the
chocolate bar when heated? The chocolate bar
changed its_________.
a. size and shape
b. taste and odor
c. texture and odor
d. odor and texture

27. 8. What will you do to dissolve sugar faster in a
cup?
a. Use cold water.
b. Use hot water.
c. Add more water to the sugar.
d. Add more sugar in the water.

28. 9. The picture below shows a piece of butter in
the frying pan. If the stove is turned on, the
butter will change from ____________,
a. liquid to gas
b. gas to liquid
c. solid to liquid
d. liquid to solid

29. 10. What change will happen in the properties of
the water when you place it inside the
refrigerator? The water will change from
___________.
a. gas to solid
b. gas to liquid
c. solid to liquid
d. liquid to solid

30. Identify what changes will happen to the materials
when exposed to certain conditions.
_______1. Ice placed on top of the table.
_______2. Oil is placed inside the cooler.
_______3. Butter is placed in a heated pan.
_______4. Water is placed inside the freezer.
_______5. Melted chocolate is placed inside the
refrigerator.

31. Choose the right word for the following statements. Answers
can be repeated.
I learned that:
When materials are heated, they change in 1. _______,
shape, form and texture. There is an increase in the 2. _________.
When heated, they change from solid to 3. ________. The
materials melt.
When 4. _______, they change from liquid to solid. The materials
return to its solid form again. There is a 5. _______ in
temperature.