Problem Method LP

1. A Semi-detailed Lesson Plan
in Science and Technology 7
Prepared by: Henry B. Sergio Jr.
Content Standard: The learners demonstrate an understanding of the properties of substances that distinguish them from mixtures.
Performance Standard: The learners should be able to investigate the properties of mixtures of varying concentrations using variable materials in the
community for specific purposes.
Week: 4, Day 2
I.Learning Objectives II.Learning Content III.Learning Procedure
(Problem Method)
IV.Evaluation V.Assignment
Given a problem
about separation
techniques, the
students should be
able to:
A. demonstrate
the different
separation
techniques;
B. display
teamwork by
collaborating
with the group
on the group
activity; and
C. demonstrate a
separation
method.
A. Subject
Matter:
Common Separation
Techniques
B. Reference:
Hadsal, A.S.
(2008).Exploring
science and
technology II. Diwa
learning system, Inc.
D. Materials:
 Bucket
 Sand
 Gravel stones
 Sifter
 Beakers
 Paper
 Water
 Flask
 Alcohol lamp
 Evaporating
dish
 Magnet
 Sifter
 Water
 Filter paper
 Pictures about
separation
techniques
*Preliminary Assessment
From the pictures posted on the board, the
students should determine what kind of
separation technique was used.
sifitng
Chromatography
Direction:
Name the techniques
which are suitable for
separating the
following mixture.
10 points
a. To obtain
drinking water from
muddy water
b. To separate
petrol from crude oil
c. To remove
leaves from a
swimming pool
d. To obtain pure
sugar from a solution
e. To determine
whether the coloring
in a fruit juice is a
single substance or a
mixture of colored
substance.
a. Evaporation/Fil
tration/Distillati
on
b. Distillation
c. Sifting
d. Evaporation
e. Chromato-graphy
Draw on a short bond
paper an illustration of
distillation unit. To be
submitted on
September 28, 2014.
(Thursday)
Criteria:
Cleanliness-10 points
Proper illustration 15
points
Total: 25 points

2. D. Concepts:
1. Filtration-this is the
separation technique
where two miscible
liquids (liquids that
mix together) are
separated.
2. Chromatography -
is the separation
technique used to
separate soluble
substances using a
media and a solvent.
3. Sifting is a method
in which you use the
property of size to
separate mixtures.
4. Evaporation-the
liquid portion of the
solution is allowed to
evaporate, leaving
the solute behind.
5. Magnetism can be
used to separate
mixtures.
E. Skill:
Demonstrating an
understanding of the
properties of
substances that
distinguish them from
mixtures by
familiarizing oneself
to the different
separation
techniques.
Sifting/Filtration
Vaporization
Magnetism

3. F. Values:
Not all things come in
pair. Not all things will
stick forever.
A. Raising of the Problem
Henry has a lot of
mixtures in his house. He
wants to separate those to
easily dispose them and
gain profit from it. How can
he separate the following
mixtures? A sand and a
gravel, seawater, dye,
water and sand, and sulfur
in iron filings.

4. B. Working on the problem
From the posted pictures of the different
separation techniques, define each using
the vertical chevron list.
magnetism
•use of magnet to separate
metals from non-metals.
Sifting
•a method in which you use
the property of size to
separate mixtures
Evaporation
•liquid portion of the solution is
allowed to evaporate,
leaving the solute behind
Filtration
•is a method that uses the
property of the boiling point
to separate two components
of a solution
Chromato-graphy
•is a method that uses the
property of thea bsorption
rate to separate different-coloured
substances from a
solution.

5. C. Selecting the Hypothesis
Based on the problem, what type of
separation method would you suggest
to help the business firm sort the gravel
and sand?
D. Gathering and Organizing of Data
1. Administer the class activity
 Divide the class into 5 groups
with 8 members each.
 Each group will be assigned on
a separation technique and
perform the principle in each
separation technique to
separate the gravel and the
sand.
 Distribute the materials to each
group. Common material for
each group is the mixture of
sand and gravel.
 Group A-sand and a gravel,
Group C-seawater, Group D-dye,
Group E-water and Group
B-and sulfur in iron filings.
2. Designate the different methods to
each group.
Group A: Sifting
sifter
Group B: Magnetism

6. horseshoe magnet
Group C. Evaporation
evaporating dish
alcohol lamp
Group D: Chromatography
beaker with water
paper

7. Group E: Filtration
flask with water
funnel with filter paper
Instruction:
Each group will try to separate the sand
and gravel using the method assigned
to them. The group also demonstrates
the method assigned to them.
3. Outcome of the Activity
Group A-the sand and gravel separated.
Group B- the iron filings separated from the
sulfur
Group C- the water evaporated leaving
behind salt.
Group D- the dye separated into different
colors like green, blue, yellow and red.
Group E- the sand was left behind the filter
paper.

8. 4. Explain the result of the activity. Why do
we need to separate mixtures?
Separation of mixtures is important
especially in the industry because in
separation, you can obtain different
substances of different use and value
5. Differentiate mixtures from substances.
Substance is an element or a compound
(two or more elements that have reacted
chemically in a fixed proportion by
mass).We can separate the various
constituents of a compound substance by
a chemical process (reaction).
Mixture is formed when two or more
substances are mixed in any proportion.
The constituents of a mixture can be
separated by a physical process.
-Mixture
-substance

9. *Medial Assessment
What are the different methods of
separation techniques?
The methods of separation techniques
are the following: magnetism,
evaporation, distillation,
chromatography, and sifting. The use of
each depends on the kind of mixture.
E. Evaluating Hypothesis
Which separation method — magnetism,
filtration or sifting, evaporation, distillation,
or chromatography — would you
recommend to divide the components of
mixtures in the following examples? Defend
your answer.
6 points
1. A chef is preparing stew and finds it
is too watery. Without adding
anything, how can the chef
separate some of the water from
the mixture?
2. A person is allergic to the yellow
dying agent used in manufacturing
certain candy coatings. Although
the coatings appear as one color,
the colors are often made from a
combination of dyes. What
separation method can be used to
determine if a yellow dying agent
was used?

10. Answer:
1. Evaporating-the mixture is in an
aqueous form.
2. Chromatography-ink colors can
separated using water and paper
F. Formulating conclusions
The methods of separation techniques are
the following: magnetism, evaporation,
distillation, chromatography, and sifting.
The use of each depends on the kind of
Not all mixtures are separated using all the
methods. Only one or two methods are
applicable. Usually, liquid mixtures are
separated through distillation and
evaporation the rest applies for the solid
It is better for the business firm to use sifting
method for more accurate and time
managed.
G. Verification
mixture.
mixtures.
On a ½ crosswise of pad paper, ask the
students to share some separating techniques
they use at home.
Criteria:
Cleanliness-10 points
Content-15 points
Total: 25 points

11. When we launder our clothes,
we separated the white
clothes from colored clothes.
*Final Assessment
Q-Define the bold words:
A- Distillation-this is the separation
technique where two miscible liquids
(liquids that mix together) are separated.
2. Chromatography -is the separation
technique used to separate soluble
substances using a media and a solvent.
3. Filtration or sifting is a method in which
you use the property of size to separate
mixtures.
4. Evaporation-the liquid portion of the
solution is allowed to evaporate, leaving
the solute behind.
5. Magnetism can be used to separate
mixtures.