Changes that Materials
Undergo
I. Learning Competency:
Investigate changes that take place under the following conditions.S5MT-Ic-d-2
LO2.4: Investigate
changes that happen in the presence of oxygen. S5 MT-lc-d-2.4
LO2.5
Investigate changes that happen in the absence of oxygen. S5MT-lc-d-2.5
II. Materials
needed:
2 pieces
of banana cue stick, 2 pieces of used paper, 5 pcs. Matchstick, 1 pc. Drinking
glass
III.
Directions:
Set
A.
1. Describe the physical characteristics of the banana
cue stick and paper.
2. Hold one end of the stick and burn the other end with
the use of matchstick. Observe will happen
3. Next hold one end of the paper and burn the other end
with the use of a matchstick. Observe what will happen
4. Write your observation on the table below.
Set
B.
1, Hold one end of the stick and burn the other end with
the use of matchstick.
2. Cover the burning stick with drinking glass. Observe
what will happen.
3 .Next Hold one end of the paper and burn the other end
with the use of a matchstick.
4. Cover the burning paper with a drinking glass. Observe
what will happen.
5. Write your observation on the table below.
|
Materials
|
Changes in materials after it was burned
Set A.
|
Changes in materials when covered by the drinking glass
Set B
|
|
Banana cue stick
|
|
|
|
Paper
|
|
|
IV. Guided
Question:
1. In set A. What condition helped in burning the stick
and paper faster?
2. What happen to the stick and paper after it was
burned?
3. In set B. What happened to the fire in the burning
stick and paper when it was covered by drinking glass?
4. Why did the flame stop?
5. What is the importance of oxygen in the activity?
6. What kind of change that the activity show?
B.
Fill in the blank: Read each situation carefully, Write you answer on the
blank.
1. When you place an iron nail in a basin of water and
leave it for two days. What is formed in the iron nail? ____________
2. After eating an apple and left it on top of a table.
What will happen to the colour of the inner core of the apple?
_____________________________
3. If you put the peeled banana inside a vacuum sealed
zip plastic bag. What do you think will happen to its colour?
______________________________________________________________
4. Why do you think silver does not form any rust even
when exposed to water or oxygen? _______________
5. What causes the change in colour of the sliced apples
when you leave it exposed to air? ____________________________
V. Generalization:
The presence and absence of oxygen
can bring changes to a material.
Certain
conditions needed for a chemical change to happen. These are the application of
heat or with a change in temperature and the presence of oxygen. Paper. wood
candle or any fuel can decompose to ash, carbon dioxide or water as one
combines oxygen in burning.
References:
Science and You Grade 5 page 24-27
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