Good Morning,: Grade 4!

Good morning,
Grade 4!
Welcome to the world of Science
- Teacher Jane
Father God,
Come be with us today,
Fill our hearts with joy,
Fill our minds with learning,
Fill our class with peace,
Fill our lessons with fun,
Fill our friendships with kindness,
Fill our world with love
Amen.
Classroom Rules
01 02 03 04 05
Choose the letter of the correct answer.
Let’s Recall
1. What will happen if there are more predators than
prey in an ecosystem?
A. The source of food will

increase.
B. The source of food will

decrease.
Let’s Recall
2. Why the relationship between a bee and a flower is
considered mutuality?
A. Because a bee and a flower both

have contributions to their
development.
B. The bee benefits from the

interaction while the flower is affected.
Let’s Recall
3. You put twelve small fish in the aquarium with three gallons of water.
You fed them with the right amount of food. Then some of the fish died
after five days. Why do you think it happened?
A. Because there was not enough

space for the number of fish.
B. Because the smelly and cloudy

water was not replaced.
Let’s Recall
4. One example of commensalism is when the plant-like fern
is attached to a branch of a tree. Why is the interaction called
commensalism?
A. Because both the branch of a tree
and a fern benefit from each other.
B. Because a fern benefits from the

relationship while the branch of a tree is
neither harmed nor benefited.
Let’s Recall
5. Which of the following pairs of organisms has harmful
interactions.
A. a snake and a rat
B. a bird’s nest and a tree.

At the end of the lesson, you are
expected to:
identify the effects of force on the size and shape of
objects;
perform the given activity accurately: and
apply knowledge on how force changes the size and shape

of objects in their daily lives.
Let us try
What is it?
Force
- is a push or a pull acting on an object.
We use force to perform various
activities.
What is it?
PUSH
- A push is when you use force to move
a thing (object) away from you.
What is it?
PULL
- A pull is a force moving something
towards you.
Let us learn
Effects of force on the size and

shape of an object
(S4FE-IIIa-1)
Let us learn
Force can change the size and shape of an object
by:
1. Bending
2. Stretching
3. Pounding
4. Pressing
5. Tearing
6. Squeezing
7. Twisting
1. Bending
Bending is when you
turn the straight
material into a curve
one by pulling the two
ends of the object.
Examples:
MATERIAL ACTION CHANGES
Glue sticks
Examples:
Glue sticks Bending It became curved
Spoon
2. Stretching An object changes
its shape and size
when pulled or
stretched.
Examples:
Examples:
Glue sticks Stretching It became longer and
thinner
Fabric
3. Pounding
An empty tin can change its size
and shape when pounding using
a hammer.
Examples:
Chili Pounding
Examples:
Chili Pounding Chili powder
Stones
4. Pressing
Applying force like pressing a ball
made of plastic materials could
produce a change in shape and size.
Examples:
Dough Pressing We can change in
any shape
Examples:
Dough Pressing We can change in
any shape and size.
Clay
5. Tearing
Tearing is the act of breaking
apart a material by force,
without the aid of a cutting tool.
Examples:
Plastic
Examples:
Plastic Tearing We can change in
any shape and size.
Fabric
6. Squeezing
Squeezing is the act of firmly

pressing an object with the use of
hands.
Examples:
Sponge Squeezing We can change in
any shape.
Examples:
Sponge Squeezing We can change in
any shape.
Toothpaste
tube
7. Twisting
The twist is to turn the ends of an

object in opposite directions.
Examples:
Wires Twisting
Remember:
The forces that can change the size and shape of the objects are:
Bending Stretching Pounding Tearing
Squeezing Pressing Twisting

Let’s have an activity
MATERIALS ACTIONS CHANGES

1. Plastic bottle
2. Plastic bag
3. Wire
Write TRUE if the statement is correct. Write FALSE if the
statement is incorrect.
True 1. Force changes the shape of an object.

False 2. When you pounded a can it will return to its original shape.
True 3. The paper changes its shape when you crumple it.
False 4. When you shake rubber bands, the shape will change.
False 5. Tearing is cutting or breaking an object with a cutting tool.

Write TRUE if the statement is correct. Write FALSE if the
statement is incorrect.
False 6. Twisting is about pulling the two ends of an object.
True 7. Bending is about pulling the two ends of an object to make it

curve.
False 8. We can throw the plastic bottle to change its shape and size
True 9. We can stretch the elastic band/ rubber band to change its size
and shape.
True 10. Applying force like pressing can change the size and shape of an
object.
Assignment:
Create your own flashcards using recycled materials
such as used folders, used cardboard, and other
materials. Be creative. Write these words in your
flashcards.
THANK YOU AND
GOD BLESS !

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Good morning,

A. The source of food will

B. The source of food will

A. Because a bee and a flower both

B. The bee benefits from the

A. Because there was not enough

B. Because the smelly and cloudy

B. Because a fern benefits from the

A. a snake and a rat

B. a bird’s nest and a tree.

perform the given activity accurately: and

apply knowledge on how force changes the size and shape

Effects of force on the size and

Squeezing is the act of firmly

The twist is to turn the ends of an

Bending Stretching Pounding Tearing

Squeezing Pressing Twisting

MATERIALS ACTIONS CHANGES

True 1. Force changes the shape of an object.

False 5. Tearing is cutting or breaking an object with a cutting tool.

True 7. Bending is about pulling the two ends of an object to make it

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