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28 Sept 2026
By folding a piece of paper in half and cutting a shape — such as a heart — from both sides at once, you can make a shape with perfect symmetry. Symmetry describes a shape or shapes with matching parts. C_Sombutpinyo/Getty Images
Scientists Explain the Secret of Symmetry in Nature
Warm-up → Read & Listen → Check Understanding → Language → Use It
WARM UP
Section: Warm Up
Think Ahead: Which detail do you think appears in this story?
a) Butterfly wings look the same on both sides.
b) Fish can fly in the sky.
c) Rocks can talk to animals.
Ask:
(1) What is your favorite animal?
(2) Do you like drawing shapes?
VOCABULARY
symmetry (/ˈsɪm.ə.tri/, noun)
Meaning: When two halves of something match each other exactly.
Example: A butterfly has clear symmetry on its wings.
balance (/ˈbæl.əns/, noun)
Meaning: A state where different parts are equal or neat.
Example: The picture has good balance and looks very nice.
pattern (/ˈpæt.ən/, noun)
Meaning: A shape or line that repeats again and again.
Example: The rug has a colourful star pattern.
nature (/ˈneɪ.tʃə/, noun)
Meaning: The world of plants, animals, and natural places.
Example: We see many bright flowers in nature today.
mirror (/ˈmɪr.ə/, noun)
Meaning: A glass item that shows your true image.
Example: She looks in the mirror to brush her hair.
shape (/ˈʃeɪp/, noun)
Meaning: The outer form of an object, like a circle or square.
Example: A star is a lovely shape to draw.
Nature has many special secrets. One fun secret is symmetry. Look closely at a butterfly. Fold a line down the middle of its body. The left side matches the right side. This equal pattern is called symmetry. Many animals and plants have this neat shape.
Starfish show this special balance too. A starfish has five arms. Each part looks the same from the centre point. It is like a mirror reflection. Scientists study these shapes in nature. They want to know why shapes match so well.
Symmetry helps animals move with ease. Birds fly straight when their two wings are equal. Fish swim well when their bodies balance in water. Look around your home or school yard today. Can you spot symmetry on leaves or flowers?
Photo by bady abbas on Unsplash
DISCUSSION QUESTIONS
1. What animals have symmetry on their bodies?
2. Can you name two shapes that look equal on both sides?
3. How does symmetry help birds when they fly in the sky?
4. Where can you find a mirror at your house?
5. Do you see patterns on flowers in the garden?
FILL IN THE GAPS
FILL THE GAPS
Section 1: Fill in the Gaps
Word Bank: balance, mirror, nature, symmetry
Nature has many special secrets. One fun secret is _______(1). Look closely at a butterfly. Fold a line down the middle of its body. The left side matches the right side. This equal pattern is called symmetry. Many animals and plants have this neat shape.
Starfish show this special _______(2) too. A starfish has five arms. Each part looks the same from the centre point. It is like a _______(3) reflection. Scientists study these shapes in _______(4). They want to know why shapes match so well.
Symmetry helps animals move with ease. Birds fly straight when their two wings are equal. Fish swim well when their bodies balance in water. Look around your home or school yard today. Can you spot symmetry on leaves or flowers?
Section 2: Main Idea
What is the main idea of this article?
a) Birds like to eat butterflies in gardens.
b) Symmetry is an equal shape pattern found in nature.
c) Fish swim faster than all other sea animals.
UNDERSTANDING
Section 3: True or False
(1) A butterfly has matching sides on its body. T/F
(2) Starfish have no matching parts at all. T/F
(3) Equal wings help birds fly straight. T/F
Section 4: Put Events in Order
Order the events from 1 to 3:
( ) Scientists study why shapes match in natural life.
( ) You look closely at a butterfly's matching wings.
( ) You check your school yard to spot symmetry on leaves.
LANGUAGE
Section 5: Vocab Match
1. symmetry
2. mirror
3. nature
4. shape
5. balance
a) A glass item that shows a clear image
b) Equal parts that make things steady
c) When two halves match each other exactly
d) The outer form of an object like a circle
e) The world of plants, animals, and natural places
USE IT
Section 6: Discussion Builder
(1) Butterfly wings have _______ on both sides.
a) symmetry
b) water
(2) A reflection in a _______ shows matching parts.
a) shoe
b) mirror
Section 7: Sentence Unscramble
(1) Unscramble:
A: two equal
B: butterfly
C: wings.
D: A
E: has
(2) Unscramble:
A: deep water.
B: swim
C: Fish
D: in the
E: very well
ANSWER KEY
Warm Up Answer: a
Section 1: (1) symmetry (2) balance (3) mirror (4) nature
Section 2: b
Section 3: (1) True (2) False (3) True
Section 4: 2, 1, 3
Section 5: 1-c, 2-a, 3-e, 4-d, 5-b
Section 6: (1) a (2) b
Section 7: (1) A butterfly has two equal wings. (2) Fish swim very well in the deep water.
Section 8: Student's own responses.
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