Our Sky Class 4 Question Answer EVS Chapter 10

Class 4 EVS Chapter 10 Our Sky Question Answer

Our Sky Class 4 EVS Question Answer

Our Wondrous World Class 4 EVS Chapter 10 Question Answer – Class 4 EVS Our Sky Question Answer

Draw (page 152)

Question.
Draw a picture of the sky as it appears in the morning, afternoon and at night, in the spaces given below.
Our Sky Class 4 Question Answer EVS Chapter 10 1
Answer:

Question.
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.
Our Sky Class 4 Question Answer EVS Chapter 10 3
Answer:

Morning Sky	Afternoon Sky	Night Sky
Orange colour of the sky	Light blue colour of the sky	Dark blue or black colour of sky
Mild sunlight	Sunlight is strong	Moon and stars
Orange Sun	Bright yellow Sun	Stars twinkling
Birds flying in the sky	Fewer birds visible	No birds flying, and different patterns of stars are observed
Fresh air, and birds chirping in the sky	Warm air and sky appears very bright	Cool air and calmness in the sky

Question.
Share your observations with your classmates and compare them.
Answer:
Do it yourself.

Question.
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.
Answer:
Do it yourself.

Discuss (Page 154)

Have you observed the changes during sunrise and sunset?
When the Sun rises:

Question 1.
How does the sky look?
Answer:
The sky looks orange. It slowly becomes brighter as the Sun rises from the East.

Question 2.
What do the birds and animals do?
Answer:
Birds start chirping and flying around. Many animals wake up and begin to move or look for food.

Question 3.
What changes do we find at home?
Answer:
The house becomes brighter with the sunlight. People wake up, open windows, and start their morning routine, cleaning of house, getting ready for school or office.

When the Sun sets:

Question 1.
How does the sky look?
Answer:
The sky turns orange and reddish as the Sun sets in the West.

Question 2.
What do the birds and animals do?
Answer:
Birds return to their nests. Many animals go back to their homes and rest.

Question 3.
What changes do we find at home?
Answer:
Lights of rooms are switched on. People return from work.

Ncert Intext Questions (Page 155)

Our Sky Class 4 Question Answer EVS Chapter 10 4
Answer:

Your shadow changes with the changes in the direction of Sun or with the time of the day such as morning, afternoon or evening. When you will change the shape of your body, the shape of shadow will also change.
No, only objects that do not let light pass through them completely form shadows and as the object moves the shadow also moves.
These changes happen because the position of the Sun changes, making the shadow direction and size change too.
No, shadows can also be formed by other sources of light, such as a torch or a lamp, as long as the object blocks the light the shadow will form.

Find Out (Page 156)

Let us try something interesting.
Our Sky Class 4 Question Answer EVS Chapter 10 5
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:

Move the stick back and forth.
Change the direction of the torch.

Think and answer the following questions.

Question.
If we change the distance of the source of light from the stick (an object), how will the shadow change?
Answer:
If the source of light is closer to the object, the shadow becomes bigger. If the source of light is moved far away, the shadow becomes smaller.

Question.
If we change the direction of the torch (source of light), how will the shadow change?
Answer:
When we change the direction of the torch, the shadow also changes its direction. It moves to the opposite side of the light.

Draw (Page 157)

Question.
Draw the position of the Sun and corresponding shadows in the images given below.
Our Sky Class 4 Question Answer EVS Chapter 10 6
Answer:

Night Sky (Page 159)

After sunset, the sky dazzles with thousands of twinkling stars. We observe various patterns of stars in the night sky. Draw any pattern you have observed, in the box below:
Our Sky Class 4 Question Answer EVS Chapter 10 8
Answer:

Question.
Share the drawing with your friends and discuss the common patterns of stars.
Answer:
Do it yourself

Draw (Page 160)

Question.
Observe the Moon in the sky and draw the shapes of the Moon you have observed on different nights.
Our Sky Class 4 Question Answer EVS Chapter 10 10
Answer:

Discuss (Page 160)

Discuss with your friends:

Question.
Is there a pattern to the way the shape of the Moon changes?
Answer:
Yes, the Moon’s shape changes in a regular pattern. It grows from a new Moon to a full Moon and then becomes smaller again until it becomes invisible known as new Moon. This cycle keeps on repeating.

Question.
Are there days when the Moon is not visible in the sky?
Answer:
Yes, there are nights when the Moon is not visible at all. This is called Amavasya or New Moon night.

Write (Page 162)

Question.
Do you celebrate any festivals in your family or community related to the Sun or the Moon? What do you call them in your language?
Answer:
Do it yourself.

Let Us Reflect (Pages 162-163)

Question 1.
Give two differences between:
(a) Day and night
(b) Sky in the morning and in the evening
(c) Our activities during the day and at night
(d) Activities of animals during the day and at night.
Answer:
(a) Day: The Sun is visible, and the sky is bright.
Night: The Moon and stars are visible, and the sky is dark.

(b) Morning: The sky appears orange with the Sun rising in the East.
Evening: The sky appears reddish-orange, and the Sun is setting in the West.

(c) Day: We do activities like going to school, playing, and working in office.
Night: We do activities like eating dinner, doing homework and sleeping.

(d) Day: Many animals like cows, dogs, birds, squirrels, and butterflies are active during the day. They search for food, move around in the sunlight.
Night: Some animals like owls and bat are active at night. These animals hunt, fly, or look for food in the dark while other animals rest or sleep at night.

Question 2.
Enquire about something
A teacher said that the Sun appears to move from East to West during the day. Meera is curious about this statement and has some questions for her teacher. List at least two questions that she can ask.
Answer:
Meera can ask:

Why does the Sun appear to move in the sky?
Does the Sun really move or is it the Earth that moves?

Question 3.
Figure it out
Suppose you stand at the same spot during the morning and the afternoon. In the morning, your shadow points in one direction, while in the afternoon it points in another. Why? Would the length of your shadow be the same at both times?
Answer:
No, the length and direction of the shadow will not be the same.

In the morning, the Sun is in the East, so the shadow is long and towards the West.
At noon, the Sun is overhead, and the shadow is shortest.
In the afternoon, the Sun is in the West, so the shadow is long again but in the opposite direction (East).

Question 4.
Get creative with words
(a) Write your own poem inspired by the beauty of the sky.
(b) Complete the riddle below and answer it –
Only one colour, but not one size Appears with light, looks very nice What is it?
Answer:
(a) Sky so wide, full of light, Blue by day and dark at night.
Sunrise orange, sunset red, Moon and stars above my head!

(b) Only one colour, but not one size Appears with light, looks very nice It follows you when you are in light, It disappears when it is night.
What is it?
Shadow