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Question

7. Formation of day and night is a periodic change. Explain it.


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Solution

Part 1: Periodic change

  • The changes that occur after a regular interval of time are called periodic changes.
  • Changes of seasons, the beating of the heart, etc. are some examples of periodic changes.

Part 2: Formation of day and night is a periodic change

  • The rotation of the earth in its own axis results in the formation of day and night.
  • It is a periodic change because it is repeated after a regular interval of time.

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