Question

(1) Discuss with your mother-father or brother-sister and write about any two
different types of changes that takes place in the cooking process in your
kitchen.
(2) Which physical changes are seen around you other than the process of
cooking? Make a list of reversible changes?

Answer 1

Boiling water cooking rice and some vegetables

Answer 2

Some of the changes occurring in the kitchen are mentioned below:

Explanation:

• The physical changes we observe while cooking are the turning of water into steam when water is boiled. Another physical change that we observe while cooking are the change of color which occurs when milk is added to tea.

• Other physical changes that we observe are the steam from a hot shower condensing on the mirror of the bathroom.

• Some of the examples of reversible changes are the turning of ice into water upon melting and turning it back to ice after freezing. Recovering of salt from water by evaporating the water.