Question

The formation of day and night is a_____________change(periodic/non periodic)

Answer 1

• Changes that are repeated after a fixed interval of time are known as periodic changes.
• Changes in seasons during a year are an example of periodic change.
• Changes that are not repeated at regular intervals and occur irregularly are called non-periodic changes. These changes can occur at any time and they do not have any periodicity.
• Example: Earthquakes, Floods.

Day and night repeated after a fixed interval of time i.e. 24 hours

Hence the formation of day and night is a periodic change.