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

Check detailed and appropriate NCERT Solutions for class 6 Science Chapter 6. Also download the solutions in PDF.

Jul 23, 2019 12:49 IST
NCERT Solutions for Class 6 Science Chapter 6

NCERT Solutions for class 6 Science Chapter 6: Changes Around Us are available here free of cost. These NCERT solutions are prepared by our subject matter experts and cover answers for all questions given in Class 6 Science NCERT Chapter 6. Check these NCERT Solutions for comprehensive study and to excel in the Science subject.

NCERT Solution for Class 6 Science

Chapter 6 - Changes Around Us

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

Answer. 

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

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

Answer. 

No, this change cannot be reversed. Though this is an irreversible change but it did not cause any change in the composition of toy. This is a physical change.

3. 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.

The sawing of a piece of wood

 

2.

The melting of ice candy

 

3.

Dissolving sugar in water

 

4.

The cooking of food

 

5.

The ripening of a mango

 

6.

Souring of milk

 

Answer.

S. 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

Yes

4.

The cooking of food

No

5.

The ripening of a mango

No

6.

Souring of milk

No

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

Answer.

If the drawing is made with a pencil then it can be erased and we will get the original sheet back. So, we can reverse the change.

But if the drawing is made with colours or pen, then it cannot be erased. Thus the change cannot be reversed.

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

Answer. 

Examples of reversible and irreversible changes are given below:

Reversible change

Irreversible change

1. Inflating a balloon: Balloon regains its original shape after evacuating.

1. Bursting of balloon: Balloon cannot get back into its original shape.

2. Making ice from water: We can get water back by melting the ice.

2. Making curd from milk: Milk cannot be obtained back once curd is formed.

3. Folding the paper: We can get back the paper in its original shape and size after unfolding it.

3. Cutting the paper: We cannot get back the original paper from its pieces.

4. Glowing of electric bulb: Once the bulb is switched off, it again becomes dark as before.

4. Burning of candle: It gives heat and light which cannot give back the original candle again.

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

Answer. 

No, the change in POP cannot be reversed because plaster of Paris on getting mixed with water changes into a hard mass and form a new compound.

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 have occurred in the cement, could be reversed?

Answer.

No, these are irreversible chemical changes.

To access the solutions in offline mode, we are providing all the solutions in PDF format which can be downloaded easily and refer whenever required. Link to download the solutions is given below:

Download CBSE Class 6 Science NCERT Solutions for Chapter 6

About Class 6 Science Chapter 6

NCERT Class 6 Science Chapter 6 explains the concepts involved in various changes taking place around us. It also explains about their types and effects. Students get to learn about the concept of bringing about a change using different factors like applying pressure or changing the temperature. This chapter demonstrates various changes with the help of a lot of activities, examples form our daily and interesting experiments.

Two main concepts discussed in Class 6 Science Chapter 6 are:

  • Can all changes always be reversed?
  • Could there be other ways to bring a change?

Free NCERT Solutions by Jagran Josh will be quite helpful for all students to clear the doubts and sharpen their concepts. These are the best updated solutions which will help in quick and effective learning.

NCERT Solutions for Class 6 Science

We have devised chapter-wise NCERT solutions for class 6 Science. All the solutions are available in PDF format which can be downloaded from the following links:

NCERT Solutions for Class 6 Science Chapter 1: Food: Where Does It Come From?

NCERT Solutions for Class 6 Science Chapter 2: Components of Food

NCERT Solution for Class 6 Science Chapter 3: Fibre To Fabric

NCERT Solutions for Class 6 Science Chapter 4: Changes Around Us

NCERT Solutions for Class 6 Science Chapter 5: Separation of Substances

NCERT solutions for other chapters will be provided here very soon. Check here for the accurate and latest NCERT solutions.

Class 6 NCERT Books for 2019-2020

Most of the teachers and educators suggest students to read the NCERT Books as these books explain all the topics in detail with simple language which makes it easy for all students to grasp the concepts and fundamental of a subject. Here, we are providing the revised edition of class 6 NCERT books for the academic session 2019-2020. All chapters can be downloaded in PDF format form the following links:

Class 6 Maths NCERT Book

Class 6 Science NCERT Book

Also check

Class 6 Maths NCERT Solutions