class 7th science test physical changes and chemical changes

worksheet on physical and chemical changes for Class 7 Science:

*Physical Changes:*/Chemical Changes:*

1. Ice → Water (State the type of change)

2. Water → Steam (State the type of change)

3. Crushing of rocks (State the type of change)

4. Melting of chocolate (State the type of change)

5. Folding of paper (State the type of change)

6. Burning of wood (State the type of change)

7. Rusting of iron (State the type of change)

8. Mixing of baking soda and vinegar (State the type of change)

9. Digestion of food (State the type of change)

10. Photosynthesis (State the type of change)

*Short Answer Questions:*

1. What is the difference between physical and chemical changes?

2. Give one example of a physical change that is reversible.

3. Give one example of a chemical change that is irreversible.

*Long Answer Questions:*

1. Describe the physical change that occurs when ice is heated. (3 marks)

2. Explain the chemical change that occurs during the rusting of iron. (4 marks)