true

Find the best tutors and institutes for Class 6 Tuition

Find Best Class 6 Tuition

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Exercise 6

To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?

Yes. The length of the dress can again be increased by unfolding it. Hence, this change can be reversed.

Comments

You accidentally drop your favourite toy and break it. This is a change you did not want. Can this change be reversed?

No. This change cannot be reversed.

 

Comments

Some changes are listed in the following table. For each change, write in the blank column whether the change can be reversed or not.

S. No.

Change

Can be reversed (Yes/No)

1.

Sawing of a piece of wood

-

2.

Melting of ice candy

-

3.

Dissolving sugar in water

-

4.

Cooking food

-

5.

Ripening of a mango

-

6.

Souring of milk

-

 

S. No.

Change

Can be reversed (Yes/No)

1.

Sawing of a piece of wood

No

2.

Melting of ice candy

Yes

3.

Dissolving sugar in water

Yes

4.

Cooking food

No

5.

Ripening of a mango

No

6.

Souring of milk

No

 

Comments

A drawing sheet changes when you draw a picture on it. Can you reverse this change?

If we draw a picture on a drawing sheet with a pencil, we can get back the original drawing sheet by erasing the drawing with an eraser. In this case, the change can be reversed.

However, if we draw with a pen, then the original drawing sheet cannot be obtained back because we cannot erase ink. Hence, in this case, the change cannot be reversed.

Comments

Give examples to explain the differences between changes that can or cannot be reversed.

To explain the differences between changes that can or cannot be reversed, some examples are given below:

(i) If we inflate a balloon, the size and shape of the balloon undergoes a change. However, the original size and shape of the balloon can be obtained back by allowing the air to escape from the balloon. This means that the change that occurs by inflating a balloon can be reversed. But, if the balloon bursts after being inflated, then its original size and shape cannot be obtained back. Thus, in this case, the change cannot be reversed.

(ii) If we fold a piece of paper, then the shape and size of the paper undergoes a change. In this case, the original shape and size of the original paper can be obtained back. Thus, this change can be reversed. However, if we cut the piece of paper, the change in the shape and size of the paper cannot be reversed.

(iii) After we roll out a chapatti from a ball of dough, the chapatti can be converted back into a ball. Thus, the change occurring here can be reversed. But, if we cook the chapatti on a tawa, then it cannot be converted back into a ball of dough. Thus, the change is irreversible.

Comments

A thick coating of Plaster of Paris (POP) paste is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilized. Can the change in POP be reversed?

When water is added to plaster of Paris (POP), it changes to another substance and on drying it hardens. Once the POP has hardened, its shape cannot be changed. Therefore, the change in POP cannot be reversed.

Comments

A bag of cement lying in the open gets wet due to rain during the night. The next day, the sun shines brightly. Do you think the changes that have occurred in the cement can be reversed?

 

In this case, the changes cannot be reversed. This is because the cement that hardens up after getting wet cannot be obtained back.

Comments

How helpful was it?

How can we Improve it?

Please tell us how it changed your life *

Please enter your feedback

Please enter your question below and we will send it to our tutor communities to answer it *

Please enter your question

Please select your tags

Please select a tag

Name *

Enter a valid name.

Email *

Enter a valid email.

Email or Mobile Number: *

Please enter your email or mobile number

Sorry, this phone number is not verified, Please login with your email Id.

Password: *

Please enter your password

By Signing Up, you agree to our Terms of Use & Privacy Policy

Thanks for your feedback

About UrbanPro

UrbanPro.com helps you to connect with the best Class 6 Tuition in India. Post Your Requirement today and get connected.

X

Looking for Class 6 Tuition Classes?

Find best tutors for Class 6 Tuition Classes by posting a requirement.

  • Post a learning requirement
  • Get customized responses
  • Compare and select the best

Looking for Class 6 Tuition Classes?

Find best Class 6 Tuition Classes in your locality on UrbanPro

Post your learning requirement

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 25 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more