NCERT Class VI Science Solutions: Chapter 6-Changes Around Us Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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NCERT Class 6 Science Chapter 6: Changes Around Us

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

Question 2:

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

Answer:

No, it cannot be reversed, so it is an irreversible change.

Question 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.

Reversible and Non-Reversible Changes
Sr. 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

Answer:

Reversible and Non-Reversible Changes (Ans)
Sr. 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

Question 4:

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

Answer:

It is all depends on situations:

  • By erasing the drawing we can undo the change. For example, if we draw with the help of pencil, we can erase the drawing by using an eraser. Then, it is a reversible change.
Image Result for if We Draw with the Help of Pencil, We Can …
  • If we draw using a pen, we cannot erase the drawing. Then this change cannot be reversed, so it is irreversible change.
As Showing in Images is a Result for Pan Drawings

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