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प्रश्न
Distinguish between the following.
Periodic change and non-periodic change
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उत्तर
| Periodic change | Non-periodic change | |
| 1. | Events that repeat themselves after a fixed period of time and whose occurrence can be predicted are called periodic changes. | The events that do not repeat themselves after a regular interval of time are called non-periodic changes. |
| 2. | Example: rotation of earth, revolution of earth, day and night, seasons, etc. | Example: natural disasters like earthquake, cyclones, etc. |
संबंधित प्रश्न
State whether the following is physical or chemical changes.
burning of wood -
Melting of solid (wax) is a physical change.
Distinguish between the following.
Natural change and man-made change
Under which different types can the following changes be classified?
Conversion of milk into yoghurt.
Under which different types can the following changes be classified?
Stretching of a spring.
Explain in brief the involvement of energy in physical and chemical changes.
How can a change occur in a substance?
Paper, LPG, CNG petrol, etc, are ______ substances.
The difference between initial state and the final state is called change.
Cut vegetables turn brown when exposed to air, this is due to ______.
