Question

Which among the following is a fast change?

• A. Decaying of dead organisms
• B. Conversion of milk to curd
• C. Burning of matchstick
• D. Germination of a seed

Answer 1

The correct option is C Burning of matchstick

The changes which take place rapidly are called fast changes. Slow and fast changes are relative.
Out of the given options burning of match stick occurs rapidly. Remaining changes require a considerable amount of time to occur.