Question

A rough piece of wood is sanded and polished resulting in change in texture, Rusting of a iron nail, Painting the grill, Bending a paper clip, Pounding silver into thin plate, Rolling the chapathi dough into thin wire, Occurrence of day and night, eruption of volcano, burning of matchstick, dosa from the batter, blinking of eyelids, occurrence of a thunderstorm, rotation of the earth, formation of eclipses.

Answer 1

Physical changes

1. Bending a paper clip. 

2. Pounding silver into thin plate. 

3. Rolling a chapathi dough into thin wire. 

4. Occurrence of a day and night. 

5. Blinking of eyelids. 

6. Occurrence of a thunderstorm. 

7. Rotation of the earth.

8. Formation of eclipses. 

9. Painting the grill.

10. A rough piece of wood is sanded and polished resulting in change in texture. 

11. Dosa from the batter.

Chemical changes 

1. Rusting of a iron 

2. Eruption of volcano 

3. Burning of matchstick.