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प्रश्न
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Periodic and non-periodic change
उत्तर
| Periodic change | Non-periodic change |
| (i) Changes which occur periodically (occur again and again) at regular intervals of time. | (i) Changes which do not occur periodically (do not repeat) at regular intervals of time. |
| (ii) Examples of a periodic change: Change of seasons, the occurrence of day and night, movement of a clock pendulum. |
(ii) Examples of a non-periodic change: Change of weather, growth of a plant, cyclones, earth-quakes, rusting of iron, thunder, and lightning. |
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Melting of butter in a pan
Fill in the blank.
Changes that occur in nature are called ........................
Write true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
A burning candle shows both physical and chemical changes. Explain ?
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Make a list of different types of changes with example.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Give two examples for each of the following cases:
Physical changes which are not reversible.
