Question

Ques1. Fill in the blanks
1-__________ are the changes in which we get back to the initial substance by reversing the action.
2-Changes that are not desirable to us are called _________--
3-A ________ change is temporary are reversible.
4-There is an exchange of___________ during a chemical change.
5-A __________ refers to the transformation of a substance from one form to another.
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Answer 1

Answer:

I. physical changes

ii. chemical changes

iii. physical changes

iv. shape, color , etc..

v. chemical changes