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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
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
Classify the following changes as physical or chemical:- melting of a solid (wax)
Write true or false
Burning of sugar is a temporary change.
Classify the following as physical or chemical change :
Condensation of steam
What will you take into account while identifying the following?
A physical change in a substance.
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
A physical change is generally____________.
Give two examples for the following case:
Physical changes which are not reversible
Iron pipes coated with zinc do not get rusted easily.
