DISTINGUISHING SUBSTANCES

AND MIXTURES
for SCIENCE Grade 7
Quarter 1/ Week 5

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 FOREWORD

This self- learning kit is designed for students in

Grade 7 in order for them to gain a better
understanding of materials as pure substances and
mixtures and learn to distinguish them.

The activities and discussions in this self- learning

kit will make the students relate to examples of
materials they use and to every task they encounter
in their homes.

Reminder: Please take good care of this Self

Learning Kit. Read it thoroughly and answer the
items that need to be answered.
Learning is FUN!

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 OB JECTIVES
K: Identify the properties of mixtures and substances.
S: Distinguish mixtures and substances by their properties.
A: Give appreciation to mixtures and substances which play
an important role to man’s survival.

LEARNING COMPETENCY
Distinguish mixtures from substances based on a set of
properties. S7MT-le-f-4

I. WHAT HAPPENED
PRE-ACTIVITIES/PRE-TEST
Directions: Write “M” if the example isa Mixture an “S” if it is a
substance. Write your answer in your notebook.

1. Seawater
2. Oxygen
3. Calamansi juice
4. Sugar
5. lumpia

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II.Directions: Write True if the statementis correct and False if the
statement is wrong.
1. A mixture is composed of substances infixed amount.
2. A substance is always homogeneous.
3. Melting points and boiling points of asubstance is definite.
4. Mixtures are physically combined structures that cannot be separated
into theiroriginal components.
5. A substance cannot be separated byordinary physical means.

III.Directions: Choose the letter of the correct answer. Write your

answer in your notebook.
1. You are tasked to check if the liquid sample you have is a
substance or a mixture. Which among these tests is the BEST way to do
so?
I. Color comparison II. Taste comparison
III. Boiling test IV. Melting test
a. I, II, III and IV c. I, II and IV only
b. I, II and III only d. I and III only
2. A liquid has the following properties: one-phase, colorless, boils at
varying temperature. Which of thefollowing BEST describes the liquid?
A. Solution C. Suspension
B. Substance D. Coarse mixture
3. Jill has an unopened box of a 2-meter foil labeled 100% made of
aluminum. Aluminum is a substance. Jill takes just a thumb-size piece
of the aluminum foil. Which of the following statements is TRUE about
the piece of aluminum foil that Jill took compared with the rest that was
left in the box?
A. Its mass and melting behavior are different.
B. Its mass and melting behavior are the same.
C. The mass is different but the melting behavior is the
same
D. The mass is the same but the melting behavior is
different

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Let us have a tour at home!

ACTIVITY: PICK and MIX

Objectives:
• Identify substances and mixtures that can be found at
home.
• Differentiate the properties of substances and mixtures.

PART I
Now try to look around your house.
1. Gather some toys and mix it all together.
Questions:
• Can you see some changes in color? Shape? Size?
• Can you easily separate the toys from the mixture?

PART II
Let us try to identify different substances that we use in our
own kitchen to make our favorite foods. I want you to list
down all the things in your kitchen that you think are
substances and answer the question below:

Question:
• How did you identify the different substances in your
kitchen?

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 II.WHAT I NEED TO KNOW

What are the

different from
substances? and substances?

Many things around you are mixtures. Some are solid like
brass and rocks, or liquid like seawater and fruit juices, or
gas like air.
Buko-pandan-sago’t-
gulaman is an example of
a mixture.
It is a very popular dessert.
It is composed of more
than one component and
it is heterogeneous.

https://www.pinoyrecipe.net/buko-pandan-sagot-gulaman-recipe/

This is an example of a
substance. It is made
up of only one kind of
matter and is
homogeneous.
Can you see the
difference between
the two?

http://www.clipartpanda.com/categories/water-clip-art-free/

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 DISCUSSION:
Let us learn together about mixtures and substances

How can “unseen” components of a homogeneous

http://fatherjulian.blogspot.com/2012/09/making-salt.html

The picture shows salt making which undergo a natural process

of distillation. It is naturally produced when salty water dries up in
the sun by evaporation and salt crystals are left behind.
(crystallization).

The water that has evaporated when collected is distilled

water and considered as a substance. Water (H2O) is composed of
H(hydrogen) and O (oxygen). Salt (NaCl) is composed of
Na(sodium) and Cl (chlorine).

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 Other properties substances and mixtures that will
distinguish one from the other is boiling point and
melting point

During boiling, the

temperature of a substance
changes at the start then it
becomes the same.

https://www.uihere.com/free-cliparts/kettle-steam-kitchen-boiling-clip-art-boil-water-kettle-1405949

During melting, a
substance melts
completely/smoothly
within a short time.

https://funbrains.net/melting-
point/

Substances like water have sharp or definite

boiling and melting points.

Mixtures like seawater’s boiling

temperature is different at different
times, melting point of solid-solid
(benzoic acid-salt mixture) has portions
that seem to be not melting.

A mixture has no definite boiling and

melting points. A mixture melts and
boils over a range of temperatures.
https://www.shutterstock.com/ima ge-vector/medical-laboratory-vector-chemical-
solution-boiling-1069786742

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 Study the concept map below and take note of the

yes Can it be separated by physical means? no

Is the composition Can it be decomposed

uniform? by ordinary chemical
means?

yes no yes no

Homogene Heterogene Compounds Elements

ous neous
Examples:
noodle
air,
seawater
Remember!

homogeneous.

composition.

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 Remember!
Mixture is a physical combination of two or more
substances.
The components of mixture can be mixed in any
proportion.
ACTIVITY 1 can be homogeneous and/or
Mixtures
heterogeneous.
Mixtures have temperature range in their melting
and boiling points.

ACTIVITY

I. Complete the table below and answer the questionsthat follow.

An example is done for you. Write youranswer in your notebook.

Material Components Homogeneous/ Substance/

Sample Heterogeneous Mixture

Ex. Samalamig sago, buko, Heterogeneous Mixture

gulaman,
milk
1. 3-in-one
coffeedrink

2. Iron nail
3. dinoldog
4. Water
(H2O)
5. Seawater

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II. Underline the correct choice in the given statement. Write your
answer in your notebook.

1. The amount of substance in a mixture (can – cannot) be

changed.

2. A (substance – mixture) has sharp or definite boiling and

melting points.

3. The substances in a mixture are (physically – chemically)

combined.

4. A substance is (always – not always) homogeneous.

5. A substance (can – cannot) be separated by ordinary

physical means.

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III. WHAT I HAVE LEARNED
EVALUATION/POST TEST:

Directions: Choose the letter of the correct answer and write it in your
notebook.

1. The components of a mixture are present in

a. fixed amount. c. equal amount.
b. any amount. d. none of these
2. What are the components of seawater that separate after distillation?
a. salt and water c. water and oxygen
b. salt and oxygen d. cannot be determined
3. The boiling point of a liquid mixture is characterized by:
a. being definite or fixed temperature
b. having both fixed and range of temperature
c. having a range of
d. none of these
4. A mixture of sand, gravel, and cement in concrete is an example of a
.
a. homogeneous mixture c. heterogeneous mixture
b. pure substance d. single phased mixture
5. Two or more substances that are not chemically combined iscalled a
.
a. pure substance c. molecule
b. compound d. a mixture
6. Which of the following can describe a substance and amixture?
a. homogeneous c. heterogeneous
b. pure matter d. homogeneous and
heterogeneous
7. Which of the following test that will check if two unknown liquid samples
are a substance or mixture?
a. taste comparison
b. boiling test
c. color comparison
d. color comparison and tastecomparison

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8. A liquid has the following properties: one-phase, colorless, boilsat
varying temperature. Which of the following BEST describes the liquid?
a. homogeneous mixture
b. heterogeneous mixture
c. substance
d. coarse mixture
9. Choose the correct description of seawater
a. Seawater is a pure substance.
b. Seawater is a heterogeneous mixture
c. Seawater consists of onlyone substance.
d. Seawater is a mixture.
10. Which of the following is NOT a property of mixtures?
a. The components can be separated.
b. The original properties of the combined substances are
changed.
c. The amount of the components is not fixed.
d. none of these

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NegOr_Q1_Science7_SLKWeek5_v2
REFERENCES
http://www.pinoyrecipe.net/buko-pandan-sagot-gulaman-recipe/

http://www.clipartpanda.com/categories/water-clip-art-free/

http://fatherjulian.blogspot.com/2012/09/making-salt.html

https://www.uihere.com/free-cliparts/kettle-steam-kitchen-boiling-clip-art-boil-water-
kettle-1405949

https://funbrains.net/melting- point/
https://www.shutterstock.com/ima solution-boiling-1069786742

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 DEPARTMENT OF EDUCATION
SCHOOLS DIVISION OF NEGROS ORIENTAL

SENEN PRISCILLO P. PAULIN, CESO V

Schools Division Superintendent

JOELYZA M. ARCILLA EdD

OIC - Assistant Schools Division Superintendent

MARCELO K. PALISPIS EdD JD

OIC - Assistant Schools Division Superintendent

NILITA L. RAGAY EdD

OIC - Assistant Schools Division Superintendent/CID Chief

ROSELA R. ABIERA
Education Program Supervisor – (LRMDS)

ARNOLD R. JUNGCO
PSDS – Division Science Coordinator

MARICEL S. RASID
Librarian II (LRMDS)

ELMAR L. CABRERA
PDO II (LRMDS)

MEDE S. MAQUILAS
Writer
LEONREY L. VAILOCES
Illustrator/Lay-out Artist

ALPHA QA TEAM
ALLAN Z. ALBERTO MANASSES V. JABALDE
SEGUNDINO B. DELES, JR. VERONICA A. RECTO

BETA QA TEAM
ZENAIDA A. ACADEMIA RANJEL D. ESTIMAR
ALLAN Z. ALBERTO MARIA SALOME B. GOMEZ
EUFRATES G. ANSOK JR. JUSTIN PAUL ARSENIO C. KINAMOT
DORIN FAYE D. CADAYDAY ARJIE T. PALUMPA
MERCY G. DAGOY LESTER C. PABALINAS
ROWENA R. DINOKOT

DISCLAIMER

The information, activities and assessments used in this material are designed to
provide accessible learning modality to the teachers and learners of the Division of
Negros Oriental. The contents of this module are carefully researched, chosen, and
evaluated to comply with the set learning competencies. The writers and evaluator were
clearly instructed to give credits to information and illustrations used to substantiate this
material. All content is subject to copyright and may not be reproduced in any form without
expressed written consent from the division.

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SYNOPSIS
This Self Learning Kit in
Science 7 aims to help students to
distinguish substances from
mixtures based on their properties.
The students are expected to
apply the knowledge they have
learned about substances and
mixtures in their daily lives.
Come and join us in our
journey as we discover how
substances and mixtures can be
distinguished from one another.

ABOUT THE AUTHOR

Author: MEDE S. MAQUILAS. Graduated
from Foundation University with the Degree
of Bachelor of Science in Biology with 24
units in Education in 1987. Presently
teaching Science 9 at Amlan National
High School, and a Science subject
coordinator in the school and in the District
of Amlan.

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