Question
Periodic changes and Non-periodic change
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Answer
| Periodic changes | Non-periodic change |
| 1. Some changes occur again and again after a definite interval of time. Such changes are called periodic changes. | 1. In this, certain changes will recur after one occurrence, it cannot be said for sure, even if they occur interval is not fixed. Such changes are called non-periodic changes. |
| 2. Examples: movement of clock hands in clock showing time, change of season, day and night formation, heart beat, ripening of fruit, rising and setting of the sun. | 2. Examples: volcanic eruption, occurrence of an earthquake, tsunami, forest fires, freezing of water to form ice, sneezing, rusting of iron. |
| 3. They repeat themselves after a fixed interval of time. | 3. They do not repeat themselves after a fixed interval of time. |
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