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# NCERT Solutions for Class 6 Science Chapter 6: Changes Around Us

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In the NCERT Solutions Class 6 Science, there are 15 chapters all of them are very important. Swiflearn offers the most correct NCERT Solutions for Class 6 Science Chapter 6 Changes Around Us will make you understand its concepts & will help you in higher studies.

Swiflearn makes sure you get the best quality study material on the internet. The solutions are created by the best teachers in India. This leaves a profound impact on your performance and grades in school. Swiflearn has NCERT Solutions Class 6th core subjects i.e. Maths & Science. Swiflearn provides comprehensive answers that will help you understand each subject in a detailed manner.

## NCERT Solutions for Class 6 Science Chapter 6 Changes around Us

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

Solution:
Yes, this change can be reversed by unfolding the dress.

#### 2. You accidentally dropped your favourite toy and broke it. This is achange you did not want. Can this change be reversed?

Solution:
No, this change cannot be reversed.

#### 3. Some changes are listed in the following table. For each change, write inthe blank column, whether the change can be reversed or not?Sr. No Change Can be reversed (Yes/No)1. The sawing of a piece of wood2. The melting of ice candy3. Dissolving sugar in water4. The cooking of food5. The ripening of mango6. Souring of milk

Solution:
Sr. No Change Can be reversed (Yes/No)
1. The sawing of a piece of wood No
2. The melting of ice candy Yes
3. Dissolving sugar in water No
4. The cooking of food No
5. The ripening of mango No
6. Souring of milk No

#### 4. A drawing sheet changes when you draw a picture on it. Can you reversethis change?

Solution:
If we draw a picture on the paper with a pencil, the change can be reversed. This is possible because the drawing can be erased. But if the drawing is made with colours then the change cannot be reversed.

#### 5. Give examples to explain the difference between changes that can orcannot be reversed.

Solution:
(a) Changes which can be reversed:
i. Melting of ice into water
ii. Opening and closing a door

(b) Changes which cannot be reversed:
i. Making curd from milk
ii. Rusting of iron

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

Solution:
The hardening of the POP on drying is an example of a chemical change, hence it cannot be reversed.

#### 7. 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, which haveoccurred in the cement, could be reversed?

Solution:
The changes that take place in cement when it gets wet is an example of chemical change, hence it cannot be reversed.

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