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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
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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
Tick the most appropriate answer.
Rising and setting of the sun at a given place is a
Make a list of different types of changes with example.
Distinguish between the following.
Physical change and chemical change
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
What kind of change is shown by tearing of paper?
Keeping a stone in sunlight for few hours is ______.
Explain the characteristics of physical change with examples.
