Question

Which of the following is not a periodic change? *
1) Swinging of a pendulum in a clock 2) Rising and setting of sun 3) Changing of seasons 4) Occurrence of cyclones

Answer 1

Answer:

Out of all 4, occurence of cyclone is not a periodic change.

Explanation:

Periodic changes are changes that occur at regular intervals.

Cyclone doesn't have a fixed time to occur.

Answer 2

Answer:

Occurrence of cyclones