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1. Scientific Inquiry
Grade 7 Chemistry

2. LEARNING
OUTCOMES
At the end of the lesson, you should be able to:
describe the components of scientific
investigation;
1
solve problems using scientific method; and
2
cite the importance of following scientific
method in solving problems.
3

3. ENGAGE

4. Examine the picture below. Identify if the
statement is an OBSERVATION or an
INFERENCE.
The boy is in the
water.
1
1

5. Examine the picture below. Identify if the
statement is an OBSERVATION or an
INFERENCE.
The weather is
cold.
1
2

6. Examine the picture below. Identify if the
statement is an OBSERVATION or an
INFERENCE.
The tree branch is
broken.
1
3

7. Examine the picture below. Identify if the
statement is an OBSERVATION or an
INFERENCE.
The boy fell off the
branch.
1
4

8. Is there a generic procedure in solving
different types of problems?
ENGAGE

9. EXPLORE

10. Interactive
Now, let’s apply the
scientific method in
solving a problem
using the Interactive.
EXPLORE

11. Manipulative
Construct an experiment that makes use
of soil moisture sensor. Show how the
scientific method was used.
Soil
Experiment

12. EXPLAIN

13. EXPLAIN
Data for Explore Activity
“Light Color and Plant Growth”
Controlled
Group
Color of Light Height of Plant
1
2
3
Table 1. Light Color and Plant Growth

14. EXPLAIN
Data for Explore Activity
“Light Color and Plant Growth”
Experimental
Group
Color of Light Height of Plant
1
2
3
Table 1. Light Color and Plant Growth

15. EXPLAIN
Data for Explore Activity
“Mystery Branch”:

16. EXPLAIN Answers to Guide Questions
for Explore Activity
“Light Color and Plant Growth”

17. Interactive
EXPLAIN
1. What was hypothesis
based on the
observation and the
question?

18. Interactive
EXPLAIN
1. What was hypothesis based on the
observation and the question?
Colored light affects the
growth of the plant (in
terms of height).

19. Interactive
EXPLAIN
2. Describe the controlled
and experimental
groups based on the
hypothesis.

20. Interactive
EXPLAIN
2. Describe the controlled and experimental groups
based on the hypothesis.
The controlled group is the
set-up with white light.
While the experimental
group is the set-up with
colored lights.

21. Interactive
EXPLAIN
3. Identify the
independent,
dependent, and
constants in the
experiment.

22. Interactive
EXPLAIN
3. Identify the independent, dependent, and
constants in the experiment.
The independent variable is
the color of light emitted by
the lamp and the dependent
variable is the height of the
plant.

23. Interactive
EXPLAIN
3. Identify the independent, dependent, and
constants in the experiment.
The constants in the
experiment are the type of
plant, the initial height of the
plant, the type of soil, and the
amount of light.

24. Interactive
EXPLAIN 4. What can you conclude
from the experiment?

25. Interactive
EXPLAIN
4. What can you conclude from the
experiment?
Plants under blue and
red light grew taller than
those plants under
white light.

26. EXPLAIN Answers to Guide Questions
for Explore Activity
“Mystery Branch”

27. Interactive
EXPLAIN Write a short summary
of the experiment.

28. Interactive
EXPLAIN
The experiment starts with a
question of why the branch is
broken. Through observation,
several suspects were suggested.
For each given suspect, the scene
was analyzed for proof until the
correct suspect was identified.
Write a short summary of the experiment.

29. The Scientific Method is a systematic approach in
solving problems used by scientists and researchers.
Francis Bacon (1561-1626) is mostly credited for the
development of this approach.

30. Generally, the scientific method
is composed of the following
steps, but may also vary from
one source to another:
• Make Observations
• Ask Questions
• Make a Hypothesis
• Conduct an Experiment
• Draw a Conclusion

31. Using the Interactive, learn how to solve a printing problem
by following the scientific method flowchart.

32. ELABORATE

33. ELABORATE
How Penicillin
Was Discovered
A famous example that
demonstrates the scientific
method was the discovery of
Penicillin – an antibiotic that
saved millions of lives.
ELABORATE

34. ELABORATE
How Penicillin
Was Discovered
Though the discovery was
“accidental”, the confirmation of
the effects of penicillin was done
through scientific method. Let’s
explore through the process of
its discovery.
ELABORATE

35. ELABORATE
How Penicillin
Was Discovered
Make Observations
Alexander Fleming was
studying a disease-causing
bacterium in his laboratory.
ELABORATE

36. ELABORATE
How Penicillin
Was Discovered
Make Observations
He observed that mold was also
growing in one of his petri
dishes that contain the bacteria.
He noticed that there were no
bacteria growing around the
mold.
ELABORATE

37. ELABORATE
How Penicillin
Was Discovered
Ask Questions
“Why are there no bacteria
growing around the mold?”
ELABORATE

38. ELABORATE
How Penicillin
Was Discovered
Make a Hypothesis
The mold produced a substance
that killed the bacteria.
ELABORATE

39. ELABORATE
How Penicillin
Was Discovered
Conduct an Experiment
Fleming grew the mold
separately and added to a
collection of harmful bacteria.
He noticed that the bacteria
around the mold died.
ELABORATE

40. ELABORATE
How Penicillin
Was Discovered
Conduct an Experiment
He repeated his experiments
until he was convinced that it
was the mold that killed the
bacteria.
ELABORATE

41. ELABORATE
How Penicillin
Was Discovered
Draw a Conclusion
Alexander Fleming concluded
that the mold produced a
chemical that killed the bacteria,
which was later on called
Penicillin.
ELABORATE

42. ELABORATE
Scientific Method
in our Daily Lives
Solve a problem that you daily
encounter using the Scientific
Method and present it in front of
the class.
ELABORATE

43. ELABORATE
Scientific Method
and Research
Download a research journal of
your choice and describe how
the researchers conducted their
research through the steps in
scientific method.
ELABORATE

44. ELABORATE
How Simple Ideas
Lead to Scientific
Discoveries
Learn more about these
discoveries by watching this
video:
https://www.youtube.com/watch
?v=F8UFGu2M2gM
ELABORATE

45. ELABORATE
Scientific Method
in the Community
Look for a problem in your
community and try to solve it
using scientific method. Share
your work in front of the class.
ELABORATE

46. EVALUATE

47. Identify the term or person being described
the given statement.
It is a systematic approach used by
scientists and researchers in solving
problems.
1
1

48. Identify the term or person being described
the given statement.
He is most credited for the development
of the scientific method.
1
2

49. Identify the term or person being described
the given statement.
It is a prediction or explanation to an
observation that is tested by an
experiment.
1
3

50. Identify the term or person being described
the given statement.
It is an antibiotic that was accidentally
discovered in the laboratory.
1
4

51. Identify the term or person being described
the given statement.
He discovered penicillin.
1
5

52. Arrange the steps in the Scientific Method according to its
proper sequence. Place numbers 1 to 5 in the boxes before the
steps in the scientific method.
Conduct
Experiment
Ask Questions
Draw a
Conclusion
Make
Observations
Make a
Hypothesis

53. Arrange the following statements in the proper sequence
according to the scientific method. Put the numbers 1 to 5 in the
box.
Alexander Fleming concluded that
the mold produced a chemical
that killed the bacteria, which was
later on called penicillin.
The mold produced a substance
that killed the bacteria.
He observed that mold was also
growing in one of his petri dishes
that contain the bacteria. He
noticed that there were no
bacteria growing around the mold.
Why were there no bacteria
growing around the mold?
Fleming grew the mold
separately and added it to a
collection of harmful bacteria.
He noticed that the bacteria
around the mold died. He
repeated his experiments until
he was convinced that it was
the mold that killed the
bacteria.