science 3

Unit 4

Words to learn Date: …./.…/….....

Picture Word Thai Meaning

Piece ช้ินส่วน

Brick อิฐ

Walkway ทางเดิน

Let’s learn more

Bricks are made mostly of clay. They are put into molds or
cut with wires, and then baked in an oven. The colour of a brick
depends on the clay from which it was made from.

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Unit 4

Some things are made of pieces of the same material. If you
separate each individual piece of that thing, it can be made into a
new thing. For example a house wall is made of bricks. If we break
a house wall into pieces, they can be made into a walkway.

A house wall is made of bricks. Bricks can be made into a walkway.

A: Observe the picture and answer the questions.

1. What is the house made of?
m2.aIkfethaenheowusoebijsecptuflrloemd ditoswmna,tcearinalw? e
3.Give 3 examples of things that are made of one material.

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Unit 4

B: Look at the pictures of each thing and write its material.
What am I made of?

Metal Wood Glass Plastic Fabric

1. 2. 3. 4. 5.

C: Look at the pictures and choose the correct materials.
A. Plastic B. Wood C. Fabric D. Metal

1. What is a chair made of ?
2. What are the keys made of ?

3. What is a t-shirt made of ?
4. What are a pair of scissors made of ?
5. What are the food boxes made of ?

102 SCIENCE LEARNERS MATERIALS GRADE 3

Words to learn Unit 4

Picture Word Date: …./.…/….....

Thai Meaning

Heated ท�ำใหร้ ้อน

Cooled ท�ำใหเ้ ย็น

Melting ละลาย

Changes in materials when they are heated or cooled.
Some materials change their physical or chemical properties
when they are heated or cooled, such as their color and shape.
For example, chocolate. When you take it out of the fridge, it will
melt easily.

What causes it to melt ?

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Unit 4

When a material is heated, it will change shape or state. For
example, when candles are heated with an alcohol burner, they
change their state or shape from a solid into a liquid that is not a
fixed shape.

Moreover, when a material is heated, it may change in colour.
For example, when an egg white is heated by boiling or frying, it
turns white.

Egg white turns white when it is heated.
Hands on Activity What Melts in the Sun?

104 SCIENCE LEARNERS MATERIALS GRADE 3

Unit 4

Science in Action
Instructions
Read, understand, and follow the methods. Record your

results, and answer the questions.
Materials

1. Chocolate, butter or sugar cubes. (Choose 1 material)
2. A pencil and a notebook to record the results.

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Unit 4

Methods
1. Divide students into groups. Each group puts the materials
that they prepared (chocolate, butter or sugar cubes) on a plate.
Then, observe the materials and record the results.
2. Take the plate to where the sunlight is. Leave it for a while,
then observe again and record the results.

Record of Activity Results
Table Changes of material (chocolate, butter or sugar cubes)
before and after they are heated.

106 SCIENCE LEARNERS MATERIALS GRADE 3

Unit 4

Answer the questions.
1. What are the changes of your material?

2. What is the factor that causes the change of your material?

3. Summarise the activity.

Do you know…. What is the change in the 2 pictures?
It’s heated or It’s cooled.

Materials can change shape. Ways to change a material’s shape.
1.Squeeze: press something firmly
2.Press: push down on something
3.Twist: turn something around itself
4. Bend: to curve something
5. Pull: to stretch something
6.Heat / Boil: to make something hot (can make it boil), which turns
it into a gas.
7.Cool / Freeze: to freeze a liquid, like water, will make it turn into
something solid, like ice.

Brain Teasers
If a material is cooled down, what will happen?

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Unit 4

Words to learn Date: …./.…/….....

Picture Word Thai Meaning

Change เปล่ียนแปลง

Liquid ของเหลว

Solid ของแขง็

In contrast, when some materials are cooled, there are changes
too. For example, when a soft drink is cooled, it will change state
from a liquid into a solid, or change shape from a liquid that is not
a fixed shape into a solid that is a fixed shape.

Have you ever put a small zip lock
bag of water or soft drink into the
freezer?
What happens to it?

Soft drink ice pop Changes in Materials when cooled

108 SCIENCE LEARNERS MATERIALS GRADE 3

Unit 4

Science in Action
Instructions

Read, understand, and follow the methods. Record your results,
and answer the questions.

Materials
1. 100 cm3 soft drinks
2. 1 Zip lock bag 10*15 cm
3. 1 plastic bucket 30.5*29 cm
4. 500g salt
5. 2000g crushed ice

Methods
1.Divide students into groups. Each group fills a zip lock bag with
soft drink and zips it up. Observe the soft drink in the zip lock bag
and record the results.
2.Put crushed ice into a plastic bucket. Then, put salt into it and
stir them together.
3. Put the zip lock bag that contains the soft drink into the plastic
bucket. Then, shake the plastic bucket for about 5 minutes.
4. Observe the changes and record the results.

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Unit 4

Record of Activity Results
Table Changes of soft drink in a zip lock bag before and
after putting it in a plastic bucket with crushed ice and salt.

Before putting it in After putting it in a
a plastic bucket with plastic bucket with
crushed ice and salt. crushed ice and salt.

What are the changes of the soft drink?
What is the factor that causes the change of the soft drink?
Summarise the activity.

110 SCIENCE LEARNERS MATERIALS GRADE 3

Unit 4

Unit Test How many points did you get ?

A: Choose the best answer.
1.Which is a natural material?
a. Gold b. Plastic c. Glass
2.Which is a man-made material?
a. Clay b. Sand c. Steel
3.Which object will a magnet attract?
a. T-shirt b. Nail c. Balloon
4.Which object will a magnet not attract?
a. Keys b. Scissors c. Paper
5.Which thing is made of the same material?
a. b. c.

B: What are the ways to change a material’s shape?
Squeeze Twist Press Bend Pull Heat/Boil Cool/Freeze

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Unit 4

Revision

A:Complete the material of each of the following things.
Metal Glass Rubber Rock

Plastic Paper Wood Fabric Brick

112 SCIENCE LEARNERS MATERIALS GRADE 3

Unit 4

B: Things made from small units of the same material.
1. What is the wall made of?
a. Bricks b. Plastic c. Metal
2.What is the bag made of ?

a. Metal b. Fabric c. Water hyacinth
3.What is the boat made of ?
a. Wood b. Metal c. Plastic
4.What is the lunch box made of ?

a. Plastic b. Fabric c. Wood
5.What is the blanket made of?
a. Plastic b. Fabric c. Wood

C: Match and write “Heat” or “Cool”
1.

2.
3.

4.
5.

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Unit 4

D: Look at the given pictures. Tick ( )if it’s oviparous or viviparous.

Oviparous = lays eggs / Viviparous = gives birth as a baby )

Oviparous Oviparous Oviparous
Viviparous Viviparous Viviparous

Oviparous Oviparous Oviparous
Viviparous Viviparous Viviparous

Oviparous Oviparous Oviparous
Viviparous Viviparous Viviparous

Oviparous Oviparous Oviparous
Viviparous Viviparous Viviparous

114 SCIENCE LEARNERS MATERIALS GRADE 3

Unit 4

E: Do you remember about “ The life cycle of a butterfly”?

• Complete these words.

Key words : Caterpillar Eggs Aduit Pupa
F: Write the answers.
1.Name 3 animals that give birth as a baby.
_________________ __________________ _________________
2.Name 3 animals that lay eggs.
_________________ __________________ _________________

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Glossary Meaning
อาหาร
Unit 1 Our Body การเจริญิ เติบิ โต
จำ�ำ เป็็น
Vocabulary ผักั
Food ผลไม้้
Growth สำ�ำ คัญั
Necessary ร่า่ งกาย
Vegetables หลากหลาย
Fruit อ้ว้ น
Important น้ำ��ำ
Body อากาศ
Variety ปััจจัยั
Obese
Water Meaning
Air สัตั ว์ก์ ิินพืืช
Factor สัตั ว์ก์ ิินเนื้้อ�
สัตั ว์ก์ ิินพืืชและเนื้้อ�
Unit 2 An Animal’s Life หายใจ
สัตั ว์น์ ้ำ��ำ
Vocabulary รอบ ๆ
Herbivore ที่�่อยู่อ�่ าศัยั
Carnivore โพรง
Omnivore กระรอก
Breathe สำ�ำ รวจ
Aquatic animal วัสั ดุุ
Surrounding นำ�ำ เสนอ
Habitat
Hollow
Squirrel
Survey
Material
Present
116 SCIENCE LEARNERS MATERIALS GRADE 3

Glossary

Unit 3 The Circle Of Life Meaning
ผู้้�ปกครอง , พ่อ่ แม่่
Vocabulary ตัวั อ่อ่ น
Parents โตเต็ม็ ที่�่
Embryos สัตั ว์ท์ ี่�่ออกลููกด้ว้ ยไข่่ , ตกไข่่
Fully grown ผู้ �ใหญ่่
Oviparous ฟัักไข่่
Adulthood สายพันั ธุ์์�
Hatch หาง
Species ลููกอ๊๊อด
Tail หนอนผีีเสื้้อ�
Tadpole ดักั แด้้
Caterpillar ตัวั อ่อ่ น
Chrysalis
Larva Meaning
โครงสร้า้ ง
Unit 4 Materials โลหะ
ผ้า้
Vocabulary ชิ้น� ส่ว่ น
Structure อิิฐ
Metal ทางเดินิ
Fabric ทำ�ำ ให้ร้ ้อ้ น
Piece ทำ�ำ ให้เ้ ย็น็
Brick ละลาย
Walkway เปลี่�ย่ นแปลง
Heated ของเหลว
Cooled ของแข็ง็
Melting
Change SCIENCE LEARNERS MATERIALS GRADE 3
Liquid
Solid

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Reference

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