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

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

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.

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.

C. Selecting the Hypothesis

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

Based on the problem, what type of

separation method would you suggest

to help the business firm sort the gravel

and sand?

horseshoe magnet

Group C. Evaporation

evaporating dish

alcohol lamp

Group D: Chromatography

beaker with water

paper

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.

4. Explain the result of the activity. Why do

we need to separate mixtures?

5. Differentiate mixtures from substances.

-Mixture

-substance

Separation of mixtures is important

especially in the industry because in

separation, you can obtain different

substances of different use and value

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.

*Medial Assessment

E. Evaluating Hypothesis

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.

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?

F. Formulating conclusions

G. Verification 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

Answer:

1. Evaporating-the mixture is in an

aqueous form.

2. Chromatography-ink colors can

separated using water and paper

The methods of separation techniques are

the following: magnetism, evaporation,

distillation, chromatography, and sifting.

The use of each depends on the kind of

mixture.

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

mixtures.

It is better for the business firm to use sifting

method for more accurate and time

managed.

*Final Assessment

When we launder our clothes,

we separated the white

clothes from colored clothes.

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.