Rbse Solutions for Class 6 Science Chapter 6 Changes Around us

Exercise Questionsncert Solutions for Class 6 Science Chapter 6

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

Solution:

Yes, the process can be reversed.

2. You accidentally dropped your favorite toy and broke it. This is a change 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 in the blank column, whether the change can be reversed or not.

Sl NoChangeCan be reversed Yes/No
1The sawing of a piece of wood
2The melting of ice candy
3Dissolving sugar in water
4The cooking of food
5The ripening of a mango
6Souring of milk
ncert Solutions for Class 6 Science Chapter 6

Solution :

Sl NoChangeCan be reversed Yes/No
1The sawing of a piece of woodNo
2The melting of ice candyYes
3Dissolving sugar in waterYes
4The cooking of foodNo
5The ripening of a mangoNo
6Souring of milkNo
ncert Solutions for Class 6 Science Chapter 6

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

Solution:

This change can be reversed if a pencil is used to draw the picture. If a pen, paint, oil /water colours are used to draw the picture, change cannot be reversed.

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

Solution:

Changes that can be reversed

i) Opening and closing the door

ii) Filling glass with water

Changes that cannot be reversed

i) Conversion of milk into curd

ii) Ripening of fruit

6. A thick coating of a paste of Plaster of Paris (POP) 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?

Solution:

No, the change 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 have occurred in the cement, could be reversed?

Solution: No, the change cannot be reversed

Important topics covered in ncert Solutions for Class 6 Science Chapter 6 Changes Around Us

  • Can all changes always be reversed?
  • Could there be other ways to bring a change?
  • Some common changes
  • Evaporation
  • Expansion
  • Contraction
  • Melting

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