There are many materials that ________________ on heating and __________________ on cooling.

_______________ change cannot be reversed .

Which of the following process can be interrupted by humans ?

When no new substance is formed after the change, it is called ___________ change.

What are the examples of physical change ?

When ice is kept on room temperature, it _________________.

When vinegar and baking soda is reacted , then formation of ____________________, water and other substances take place.

Which of the following are correct :

(a) When a goldsmith hammers a piece of gold, he makes intricate designs on it.

(b)  Force can bring changes in certain things.

Which of the following are correct :

(a) Night becomes day is an natural change.

(b) Night becomes day is an man made change.

Which of the following are correct :

(a) The changes that take a long duration of time to complete, are called slow changes.

(b) The changes that take a long duration of time to complete, are called Fast changes.

(c) The changes that take a short duration of time to complete, are called Fast  changes.