Poonam Singh, Satyam and, Dinesh Kumar Solutions for Chapter: Changes Around Us, Exercise 3: Miscellaneous Questions

Pick the change that can be reversed from the following.

While lighting a candle, Paheli observed the following changes.

(i) Wax was melting

(ii) Candle was burning 

(iii) Size of the candle was reducing 

(iv) Melted wax was getting solidified

Of the above, the changes that can be reversed are:

Salt can be separated from its solution (salt dissolved in water) because 

Rolling of chapati and baking of chapati are the changes that 

Iron rim is made slightly smaller than the wooden wheel. The rim is usually heated before fixing into the wooden wheel because on heating the iron rim 

Which one of the steps while burning a candle is not reversible? 

Which is a way to make a change happen?

Rusting of iron is an example of