Republic of the Philippines
Department of Education
Region VIII
Division of Samar
STA. MARGARITA NATIONAL HIGH SCHOOL
School ID: 303629, Sta. Margarita, Samar
Name :_____________________________________
Grade: _______________________________
Section:____________________________________
Date: _________________________________
LEARNING ACTIVITY SHEET IN SCIENCE 8
Quarter 3 – Module 2
Atoms and Molecules
What I Need to Know
At the end of this module, you should be able to:
1. Explain physical changes in terms of the arrangement and motion of atom and
molecules. (S8MT – IIIc-d-9)
What I Know (Pre-Test)
Instructions: Read and answer the questions below. Write the letter of the correct
answer in
your paper.
1. Which of the following does NOT prove that the molecules of a material are always moving?
A. Aroma of boiling coffee
B. Evaporation of water
C. Soil particles carried by the water
D. Sweetness of sugar
2. Which of the following is a mixture?
A. Distilled water
B. Fruit sugar
C. Soy sauce
D. Table salt
3. Why could you hardly break a stone even if much force is applied to it?
A. are negligible
B. compactly arranged with one another
C. loosely bound together
D. very far from one another
4. When a drop of ink was put into a glass of water, its tendency is to spread
out. This is because the atoms of ink __________________.
A. are not moving
B. are compact and rigid
C. are in random motion
D. have distinct characteristics
5. What is formed if you mix water and soy sauce?
A. a 1-phase system
B. a 2-phase system
C. a heterogeneous system
D. a compound
6. Which of the following is a substance?
A. Copper
B. Padlock
C. Pin
D. Solder
7. How does a mixture different from a substance?
A. In mixture it keeps its characteristics
B. Mixtures are found in nature
C. Mixtures have 2 or more components
D. Solids, liquids and gases can form mixture
8. The only mixture that looks like only one chemical composition in physical appearance.
A. Colloid
B. Compound
C. Solution
D. Suspension
9. Which of the following has one kind of atom?
A. Carbon dioxide
B. Gold
C. Iron oxide
D. Water
10. Which of the following is a substance?
A. Copper
B. Key
C. Padlock
D. Solder
Lesson 1:
Physical Changes in Terms of the Arrangement and Motion of Atoms
What I Need to Know
At the end of the lesson, you are expected to:
1. Explain the arrangement and motion of atoms.
Activity 1: Give me space
Objective:
After doing this activity, you should be able to:
1. Show and describe the spaces between atoms.
Materials:
 Sand
 Marbles / Plastic beads
 transparent glass
 water
 medicine dropper
Procedure:
1. Fill a glass with marbles or plastic beads until you cannot add more. Then pour grains of sand
into the same container.
2. Next, fill another glass with as much water as it can hold. Use a medicine dropper to add the
last few drops. Then gently drop few grains of sand into the water.
3. Shake the mixture. Observe again what happens.
Q1. Why can the glass container accommodate the sand when it cannot accommodate more
marbles?
Q2. Does the water spill? Why?
Q3. What happens when you pour slowly the sand into the glass of water? Explain.
Activity 2: What is Matter made of?
Objective:
After this activity, you should be able to:
1. Describe the arrangement of atoms in liquids.
Materials:
a glass of water, medicine dropper,
food coloring or ink
Procedure
1. Place a drop of ink or food coloring into the glass of water.
2. Do not disturb the glass of water. Observe what happens to the color of the water.
3. While the particles of ink or food coloring are in motion, record the time consumed.
4. Note the time taken to travel the particles of the ink or food coloring.
Table 1. Relationship between motion and time
Time (t) seconds
Observations
Questions:
Q1. What do you observe? __________________________________________________
Q2. Describe how the color spreads in the water. _________________________________
Q3. Why does the water change its color? _______________________________________
Q4. Did the color spread faster in the water? _____________________________________
Q5. What property will explain based on what you have observed? ___________________
What Is It
Pure Substance
Matter are often classified into pure substance and mixtures. Substance are often a component
or compound. Matter endure either physical or chemical change. Physical change occurs when a
substance changes its appearance without changing its composition. Phase change is the process of
changing from one physical state to another. While chemical change occurs when a substance is
transformed into another substance.
Substance is a homogeneous material consisting one particular kind of matter. Homogeneous
mixture is a substance that exist in one phase of matter. Mixture is composed of two or additional
pure substance. It is a material consisting two or more kinds of matter each of which retains its own
characteristic. Mixture can be homogeneous mixture having uniform in appearance or heterogeneous
having non- uniform in appearance.
An atom is that the smallest particle of a component that has all the properties of the
element. Atom of the most elements have the ability to combine with other atoms. Different elements
have different properties because the combining atoms are different and the way the atoms are
joined together are different. Atom is made even smaller particles.
SOLID
LIQUID
GAS
SOLID
SOLID
Figure 3. Particles of Solid, Liquid, and Gas
Molecules of solids are compact. They have small spaces between them. This prevents from
moving freely. They vibrate in fixed position. Solids have definite shape and volume because the
particles are closely packed. They vibrate a little but in fixed positions. The particles cannot move
around. The particles of solid held together by strong force. The volume of solid is definite
In liquids, molecules move slowly and are closer together. Liquids have an exact volume and
however assume the form of the container. Their molecules have farther spaces. The attraction
between particles is stronger than those of gases. The particles move and change position.
Gas has no definite shape and volume. It spreads to fill up whatever space is available. Gas
particles move very fast and are very far from each other.
What I Have Learned
Activity 3: Try Again!
Instructions: Below are different materials. Identify whether it is a substance or a
mixture. Put a check in the appropriate column.
Chemical System
Substance
Mixture
1.Salt solution
2.Brown sugar
3.alcohol
4.Tawas
5.Milo in hot water
6.Salt
7.water
8.Iron
9.Softdrink
10.Charcoal
Q1. When can you say that a chemical system is a substance or a mixture?
What I Can do
Activity 4: THIS IS IT!
1. Cut – out pictures of different objects like drinks, balloons, medicines lotions, beauty products from
old magazines. Identify which are mixtures and substance. Cite importance of mixture in your daily
life.
Lesson 2:
Physical
Changes in Terms of the Arrangement and motion of Molecules
What I Need to Know
Objectives:
At the end of lesson, you are expected to:
1. explain physical change in terms of the arrangement and motion ofmolecules.
What’s New
Activity 1: What is Matter made of?
Objective:
After performing the activity, you should be able to:
1. Explain how these observed situations or events give evidence that matter is made up of
tiny particles.
Materials:
clean tap water
Transparent glass
Spoon
10 ml alcohol / 10 tablespoons of alcohol
50 ml water / 1 cup of water
Procedure:
1. Use a clean transparent glass, pour alcohol up to 20 ml (10 table spoon).
2. Measure 50 ml of water.
3. Add the 50 ml water to the alcohol and mix through. Observe the resulting solution.
(Caution: Do not taste the solution)
Q1. What is the appearance of the resulting mixture? _____________________________________________
Q2. Think about the alcohol and water as made as tiny particles. Give your reasons for the observations you
made in Q1. ______________________________________________________________________________
Q3. What is the volume of alcohol and water mixture? _____________________________________________
Q4. Is there a change of volume after mixing these two liquids? _____________________________________
What Is It
Molecules are composed of Atoms
The existence of matter in a solid, liquid, or gaseous phase enables us to infer the structure of
matter. Scientists theorized that molecules are further composed of particles, even smaller called
atoms. In 1805, John Dalton an English scientist, proposed the atomic theory of matter. This theory
states that all matter consists of very tiny particles, the atoms. In some cases, a molecule is made up
of only one atom. An example of this is a molecule of water composed of two atoms of hydrogen and
one atom of oxygen (H2O.)
The molecules are constantly moving. Molecules of liquids and gases spread from where there
are more molecules to places where there are few molecules. This process is known as diffusion.
Matter can be classified as mixture, which can be broken down by physical means, or a pure
substance, which cannot be broken down physically into simpler substance. There is some mixture
specially solution which are substance-like because it appears to have one chemical composition only
like seawater and vinegar.
What I Have Learned
Activity 2: Answer Me
Objective:
To be able to identify substance and mixture.
Instructions: Identify the given chemical system as substance or mixture. Write
your answer on the space provided. Number one has been done for
you.
Chemical System
Substance or Mixture
1.sugar
Substance
2.ice cream
3.paper
4.alcohol
5.salt
6.rice grain
7.bottled water
8.Peanut butter
9.halo-halo
10.vinegar
Summary
 Matter has mas and it occupies space.
 Matter can be classified into solids, liquids, and gases.
 Solids are substance with a definite volume, but the assume the shape of the container. Gases
are substance with neither a definite volume nor a definite shape.
 Matter is composed of particles called molecules.

Molecules in solids are arranged farther apart.
 The molecules in liquids are arranged farther apart than in solid.
 The molecules in gasses are arranged still farther apart than in liquids
 Molecules are composed of smaller parts called atoms.
 Spaces exist between molecules.
 Molecules are in constant motion.
 Molecules in gases move fast.
 In liquids they move slower, and in solid, it moves slowest.
 Evaporation is the process by which liquid change to gas.
 Condensation is the process in which a gas is change to liquid.
 Melting the process in which a solid will change to liquid.
 Freezing is the process in which a liquid will change to solid.
 Mixture has no definite properties
 Substance is a homogeneous material consisting of one particular kind of matter.
 Homogeneous mixture when it has uniform composition.
 Heterogeneous mixture when its components and properties are not distributed evenly.
 Chemical Change when substance change its appearance, occurs when it transforms into
another substance having different set of properties.
 Physical change when substance changes its appearance.
Assessment (Post-Test)
Instructions: Read and answer the questions below. Write the letter of the correct answer in your
paper.
1. When you were able to observe the sweet smell of ripe fruit from the dining table, you are aware
that a process had occurred. What do you call this natural process?
A. Absorption
B. Assimilation
C. Diffusion
D. Digestion
2. Molecules constantly move from one place to place. In which of the following is the movement of
the molecules fastest? The molecules of_______________________.
A. a gas in another gas
B. a liquid in another liquid
C. a solid in a liquid
D. a solid in another solid
3. A mixture that has the same appearance and composition throughout?
A. Colloidal
B. Heterogeneous
C. Homogenous
D. Tonic
4. At the right is a diagram of a molecule of water as seen under the electron microscope. What
makes up a molecule of water?
A. An atom of hydrogen and three atoms oxygen.
B. An atom of oxygen and two atoms of hydrogen.
H O
H
C. An atom of hydrogen and three atoms oxygen.
D. Three atoms of hydrogen and two atoms of oxygen.
5. Which of the following is an example of a heterogeneous mixture?
A. Halo - halo
B. Metal alloy
C. Sea water
D. Vinegar
6.Which of the following shows physical change?
A. Boiling an egg
B. Boiling of water
B. Burning of wood
D. Digesting of food
7. Mixing 20 grams of sugar and 50 mL of water results a volume of less than
70 mL. What explains this result?
A. Sugar dissolves in water.
B. There is an error measuring the amount of sugar and water.
C. Water has tiny particles with spaces between them, allowing sugar particles
to fit in.
D. Water has close particles with no spaces between them, sugar
particles cannot fit in.
8. In the three phases of matter, which has the strongest force of attraction?
A. Freezing
B. Gas
C. Liquid
D. Solid
9. When liquid turns into solid, which of the following physical change occurs?
A. Condensation
B. Deposition
C. Freezing
D. Sublimation
10. Which of the following is not a mixture?
A. Mayonnaise
B. Shampoo
C. Softdrink
Prepared by:
MRS. MARIA CRISTINA C. DELMO
Subject Teacher, Science 8
Contact Number: 0916-354-4792 (globe)/0909-358-2167 (smart)
FB: Maria Cristina Delmo
Gmail: macristinadelmo2187@gmail.com
D. Tawas
3D ATOMIC MODEL
TASK: Create a 3-D model of an atom of assigned element following the Bhor’s Atomic Model.
Rubric for 3 D Atomic Model
Criteria
10 points
7 points
5 points
creativity
Exceptionally degree
of student creativity
is displayed in
flexibility of thought
and originality
Only few areas of
the ATOMIC MODEL
the student
creativity
Minimal creativity or
ATOMIC MODEL is a
recreation of a
existing image
Minimal creativity or
ATOMIC MODE is a
recreation of a preexisting image
The organization of
the ATOMIC
MODEsynthesizes
independent parts
into a singular work
of art that unifies
and balances.
The organization of
the ATOMIC
MODEsynthesizes all
but a couple areas
into a singular work
of art that unifies
and balances
The organization of
theATOMIC
MODEsynthesizes
all but a few areas
into a singular areas
into singular work of
art that unifies and
balances.
The ATOMIC MODE
does not unify and
appears disjointed
ATOMIC MODE is
seamlessly
assembled and
completely covered.
Pieces are precisely
cut and well glued
down.
Much time and
effort went into the
planning and
designing of the
ATOMIC MODE.It is
clear the student
worked at home.
ATOMIC MODE is
well assembled with
only few pieces that
are not well cut out
or glued down.
ATOMIC MODE is
well assembled with
only several pieces
that are not well cut
out or glued down
Haphazard
Craftsmanship
Student could have
put in more time
and effort at
home.
Class time was not
always used wisely,
but student did do
some
Addition at home.
Time was not used
wisely.
Student put in no
additional effort
organization
craftsmanship
Time and Effort
Example:
3 points
What is Atomic Model?
Is a 3D concept of atom.
Materials:







Cup of cans (takip ng mga bote, softdrinks)
Marble o dyolens or styro foam balls
Stick glue
Colored paper
Scissor
Glue
Wire or alambre
Note: Para sa stand nito maaari kayong gumamit ng isang piraso ng maliit na flywood o kahit anong bagay na
mabigat upang ito ay tumayo. Huwag kalimutang ilagay ang pangalan ng atom.
Paano Gawin:
Pumili ng isang element sa atoms o molecules na bubuuin mo na model. Narito ang mga halimbawa sa
ibaba..maaaring magresearch sa internet sa mas makahanap pa ng ibang halimbawa ng atoms na maaaring gawing
proyekto.
water
IXTURES AND SUBSTANCE
INSTRUCTION: Cut – out pictures of different objects like drinks, balloons, medicines,lotions,
beauty products from old magazines. Identify which are mixtures and substance. Cite
importance of mixture in your daily life.
Republic of the Philippines
Department of Education
Region VIII
Division of Samar
STA. MARGARITA NATIONAL HIGH SCHOOL
School ID: 303629, Sta. Margarita, Samar
Name :_____________________________________
Grade: _______________________________
Section:____________________________________
Date: _________________________________
LEARNING ACTIVITY SHEET IN SCIENCE 8
Quarter 3 – Module 2
Atoms and Molecules
Assessment
Directions: Choose the letter of the correct answer and write it in your notebook.
1. Which statement is TRUE about the aspects of the particle model of matter?
A. Matter is made up of bigger particles.
B. Particles of matter do not attract each other.
C. Particles of matter are not moving all the time.
D. Particles of matter have spaces between them.
2. Which would not change when an orange juice is poured from a can into a drinking glass?
A. the color of the orange juice
B. the shape of the orange juice
C. the taste of the orange juice
D. the volume of the orange juice
3. What happens to shape and size of the stone if you put it in a smaller container?
A. A stone keeps its original shape and volume.
B. A stone keeps its original shape but not its volume.
C. A stone keeps its original volume but not its shape.
D. A stone changes its original volume and its shape.
4. Why can many balloons be filled from one small tank of helium?
A. The particle of helium gas in a balloon is locked in.
B. The particles of helium gas in a balloon are far apart.
C. The particles of helium gas in a balloon are slightly apart.
D. The particles of helium gas in a balloon are very closed to each other.
5. When you poured the honey to a tablespoon it flows easily, what happens to the
6.
7.
8.
9.
particles of honey?
A. The particles slide past one another.
B. The particles come close together and vibrate.
C. The particles are moving far apart and independent of one another.
D. The particles are locked in place and vibrate independently to each other.
Imagine inflating a balloon. Would anything happen to the shape and size of the
balloon? Which of the following statements support the correct idea?
A. Only its shape increases.
B. Only its volume increases.
C. The shape of the balloon increases and also its volume.
D. Only the shape of the balloon increases and nothing happens to its volume.
Why does cooking oil take the shape of its container?
A. The cooking oil is a liquid that has a definite volume only.
B. The cooking oil is a liquid that has a definite shape and volume.
C. The cooking oil has a definite volume but does not take the shape of the D.
container.
D. The cooking oil is a liquid that has a definite volume but takes the shape shape
of the container
How would you explain the images of the solid particles below?
A. Unnoticeable space between particles.
B. There are lots of free spaces between them.
C. There’s only little free space between them.
D. Particles can move fast one another at the same time.
How would you explain the distances of liquid particles?
A. There’s only little free space between them.
B. There’s unnoticeable space between particles.
C. There are lots of free spaces between them.
D. Particles kept on moving at any direction from one place to another.
10. One property of the microscopic behavior of matter is the ability of the particles to move.
Rank solid, liquid, and gas in order of the particles speed from highest to lowest.
A. Gas -----Solid -----Liquid
C. Gas -----Liquid ----- Solid
B. Solid ----Gas ----- Liquid
D. Liquid ---Gas ------- Solid
Prepared by:
MRS. MARIA CRISTINA C. DELMO
Subject Teacher, Science 8
Contact Number: 0916-354-4792 (globe)/0909-358-2167 (smart)
FB: Maria Cristina Delmo
Gmail: macristinadelmo2187@gmail.com