Question

1. What are the differences between physical and chemical changes)
E. Very short answer questions :
2. Give two examples of physical changes.
2. Define irreversible change.
3. What is a chemical change?
4. Write two importance of physical change.
Short answer questions :
2. Define physical changes.
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Answer 1

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut.

Answer 2

1) Water freezing into ice