Class 4 EVS NCERT Book Chapter 10 Our Sky

 Page 1


Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
10
Our Sky Our Sky
Morning Sky                                Afternoon Sky Night Sky
Chapter 10.indd   152 Chapter 10.indd   152 30-03-2025   09:53:26 30-03-2025   09:53:26
Page 2


Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
10
Our Sky Our Sky
Morning Sky                                Afternoon Sky Night Sky
Chapter 10.indd   152 Chapter 10.indd   152 30-03-2025   09:53:26 30-03-2025   09:53:26
153 Our Sky
Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
Write down what you observe in the sky during the 
morning, afternoon and at night, in the table given below.  
A few boxes are filled for you. You may expand your table 
by adding new points.
Morning Sky Afternoon Sky Night Sky
Orange colour of 
the sky
Sunlight is 
strong
Moon and stars
Orange Sun
• Share your observations with your classmates and 
compare them.
• Have you observed any change in the activities, and 
the behaviour of animals and plants at different 
times of a day?  Discuss these changes with your 
friends and make a list.
Can you guess the brightest object in the sky? It 
is the Sun! In fact, it is so bright that the other stars 
cannot be seen when it is present in the sky. The 
Sun gives us light and heat. 
Chapter 10.indd   153 Chapter 10.indd   153 30-03-2025   09:53:28 30-03-2025   09:53:28
Page 3


Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
10
Our Sky Our Sky
Morning Sky                                Afternoon Sky Night Sky
Chapter 10.indd   152 Chapter 10.indd   152 30-03-2025   09:53:26 30-03-2025   09:53:26
153 Our Sky
Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
Write down what you observe in the sky during the 
morning, afternoon and at night, in the table given below.  
A few boxes are filled for you. You may expand your table 
by adding new points.
Morning Sky Afternoon Sky Night Sky
Orange colour of 
the sky
Sunlight is 
strong
Moon and stars
Orange Sun
• Share your observations with your classmates and 
compare them.
• Have you observed any change in the activities, and 
the behaviour of animals and plants at different 
times of a day?  Discuss these changes with your 
friends and make a list.
Can you guess the brightest object in the sky? It 
is the Sun! In fact, it is so bright that the other stars 
cannot be seen when it is present in the sky. The 
Sun gives us light and heat. 
Chapter 10.indd   153 Chapter 10.indd   153 30-03-2025   09:53:28 30-03-2025   09:53:28
154 Our Wondrous World
In the sky, the Sun is the most visible object. The 
Sun appears to rise in the morning. Then, it seems 
to move up till it comes overhead. Slowly, it appears 
to move downwards on the other side of the sky till 
it disappears. We all enjoy this visible journey of the 
Sun in the sky. 
Note to the Teacher
Encourage students to observe and share various changes in the 
activities, and the behaviour of plants and animals, including 
humans at different times of the day.
Have you observed the changes during sunrise and sunset? 
When the Sun rises:
1. How does the sky look?
2. What do the birds and animals do?
3. What changes do we find at home?
When the Sun sets:
1. How does the sky look?
2. What do the birds and animals do? 2. What do the birds and animals do?
3. What changes do we find at home? 3. What changes do we find at home?
Chapter 10.indd   154 Chapter 10.indd   154 30-03-2025   09:53:30 30-03-2025   09:53:30
Page 4


Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
10
Our Sky Our Sky
Morning Sky                                Afternoon Sky Night Sky
Chapter 10.indd   152 Chapter 10.indd   152 30-03-2025   09:53:26 30-03-2025   09:53:26
153 Our Sky
Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
Write down what you observe in the sky during the 
morning, afternoon and at night, in the table given below.  
A few boxes are filled for you. You may expand your table 
by adding new points.
Morning Sky Afternoon Sky Night Sky
Orange colour of 
the sky
Sunlight is 
strong
Moon and stars
Orange Sun
• Share your observations with your classmates and 
compare them.
• Have you observed any change in the activities, and 
the behaviour of animals and plants at different 
times of a day?  Discuss these changes with your 
friends and make a list.
Can you guess the brightest object in the sky? It 
is the Sun! In fact, it is so bright that the other stars 
cannot be seen when it is present in the sky. The 
Sun gives us light and heat. 
Chapter 10.indd   153 Chapter 10.indd   153 30-03-2025   09:53:28 30-03-2025   09:53:28
154 Our Wondrous World
In the sky, the Sun is the most visible object. The 
Sun appears to rise in the morning. Then, it seems 
to move up till it comes overhead. Slowly, it appears 
to move downwards on the other side of the sky till 
it disappears. We all enjoy this visible journey of the 
Sun in the sky. 
Note to the Teacher
Encourage students to observe and share various changes in the 
activities, and the behaviour of plants and animals, including 
humans at different times of the day.
Have you observed the changes during sunrise and sunset? 
When the Sun rises:
1. How does the sky look?
2. What do the birds and animals do?
3. What changes do we find at home?
When the Sun sets:
1. How does the sky look?
2. What do the birds and animals do? 2. What do the birds and animals do?
3. What changes do we find at home? 3. What changes do we find at home?
Chapter 10.indd   154 Chapter 10.indd   154 30-03-2025   09:53:30 30-03-2025   09:53:30
155 Our Sky
The Shadows
Have you ever noticed your shadow moving along 
with you? If you run, the shadow seems to be 
running with you. If you make different poses, the 
shape of the shadow changes. Let us explore some 
interesting things about the shadows. 
Evening shadow
Noon shadow
Early morning 
shadow
In the pictures above, what are the differences in 
the shadows? Shadows at morning are long, noon 
shadows are short and shadows at evening are long 
again. However, the evening shadows appear in the 
opposite direction of morning shadows.
Does this
happen to all
the objects?
Are 
shadows 
formed only in the 
sunlight?
How does
my shadow change?
I wonder why 
these changes 
occur?
Chapter 10.indd   155 Chapter 10.indd   155 30-03-2025   09:53:31 30-03-2025   09:53:31
Page 5


Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
10
Our Sky Our Sky
Morning Sky                                Afternoon Sky Night Sky
Chapter 10.indd   152 Chapter 10.indd   152 30-03-2025   09:53:26 30-03-2025   09:53:26
153 Our Sky
Have you ever looked up at the sky? It appears 
different at various times of the day. The colour of 
the sky changes in the morning, afternoon and at 
night. The Sun’s colour also appears to change.  
Even, the size and the shape of the Moon seem to 
change over time. The activities of birds, animals, 
trees and humans also vary during the course of  
the day.
Pictures of the Sky
Draw a picture of the sky as it appears in the morning, 
afternoon and at night, in the spaces given below.
Write down what you observe in the sky during the 
morning, afternoon and at night, in the table given below.  
A few boxes are filled for you. You may expand your table 
by adding new points.
Morning Sky Afternoon Sky Night Sky
Orange colour of 
the sky
Sunlight is 
strong
Moon and stars
Orange Sun
• Share your observations with your classmates and 
compare them.
• Have you observed any change in the activities, and 
the behaviour of animals and plants at different 
times of a day?  Discuss these changes with your 
friends and make a list.
Can you guess the brightest object in the sky? It 
is the Sun! In fact, it is so bright that the other stars 
cannot be seen when it is present in the sky. The 
Sun gives us light and heat. 
Chapter 10.indd   153 Chapter 10.indd   153 30-03-2025   09:53:28 30-03-2025   09:53:28
154 Our Wondrous World
In the sky, the Sun is the most visible object. The 
Sun appears to rise in the morning. Then, it seems 
to move up till it comes overhead. Slowly, it appears 
to move downwards on the other side of the sky till 
it disappears. We all enjoy this visible journey of the 
Sun in the sky. 
Note to the Teacher
Encourage students to observe and share various changes in the 
activities, and the behaviour of plants and animals, including 
humans at different times of the day.
Have you observed the changes during sunrise and sunset? 
When the Sun rises:
1. How does the sky look?
2. What do the birds and animals do?
3. What changes do we find at home?
When the Sun sets:
1. How does the sky look?
2. What do the birds and animals do? 2. What do the birds and animals do?
3. What changes do we find at home? 3. What changes do we find at home?
Chapter 10.indd   154 Chapter 10.indd   154 30-03-2025   09:53:30 30-03-2025   09:53:30
155 Our Sky
The Shadows
Have you ever noticed your shadow moving along 
with you? If you run, the shadow seems to be 
running with you. If you make different poses, the 
shape of the shadow changes. Let us explore some 
interesting things about the shadows. 
Evening shadow
Noon shadow
Early morning 
shadow
In the pictures above, what are the differences in 
the shadows? Shadows at morning are long, noon 
shadows are short and shadows at evening are long 
again. However, the evening shadows appear in the 
opposite direction of morning shadows.
Does this
happen to all
the objects?
Are 
shadows 
formed only in the 
sunlight?
How does
my shadow change?
I wonder why 
these changes 
occur?
Chapter 10.indd   155 Chapter 10.indd   155 30-03-2025   09:53:31 30-03-2025   09:53:31
156 Our Wondrous World
1. Take a torch and a stick. Close 
the doors and windows to 
make the room dark.
2. Hold the stick in one place 
and turn on the torch. Shine 
the torchlight on the stick. 
3. Observe the changes in the 
shadow of the stick, in the 
following situations:
(a) Move the stick back and 
forth.
(b) Change the direction of the 
torch.
Think and answer the following questions.
• If we change the distance of the source of light from 
the stick (an object), how will the shadow change?
• If we change the direction of the torch (source of 
light), how will the shadow change?  
If the object is close to the source of light, the 
shadow is bigger. If the direction of the source of 
light changes, the direction of the shadow also 
changes. We observe that shadows in the morning 
and evening form in different directions. Why does 
this happen?
Let us try something interesting.
Chapter 10.indd   156 Chapter 10.indd   156 30-03-2025   09:53:32 30-03-2025   09:53:32