NCERT Class VI Science Solutions: Chapter 6-Changes Around us Part 1

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Watch Video Lecture on YouTube: NCERT Class 6 Science Chapter 6: Changes Around Us

NCERT Class 6 Science Chapter 6: Changes Around Us

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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
Reversible and non-reversible changes

Sr.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:

Reversible and Non-Reversible Changes (Ans)
Reversible and non-reversible changes (Ans)

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

Yes

4

The cooking of food

No

5

The ripening of a mango

No

6

Souring of milk

No

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 …

Erase the Drawing by Using an Eraser

  • 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

Result of the Pan Drawings

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