Advertisements
Advertisements
Question
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
Advertisements
Solution
| 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. |
APPEARS IN
RELATED QUESTIONS
Classify the following as chemical or physical change:
Rusting of almirah
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.
State whether the following is physical or chemical changes.
mixing oil with water —
State whether the following is physical or chemical change.
Digestion of food —
Sublimation is classified as a physical change. Why ?
Is a change of state of matter – a physical or a chemical change. Give reasons.
Select the chemical changes from the following list of changes
The occurrence of lightning.
Wood to sawdust:______:: Wood to Ash: Chemical change
Match the items of Column I with the items of Column II.
| Column I | Column II | ||
| (a) | Large crystals | (i) | Turns lime water into milky |
| (b) | Depositing a layer of zinc on iron | (ii) | Physical change |
| (c) | Souring of milk | (iii) | Rust |
| (d) | Carbon dioxide | (iv) | Sugar candy (Mishri) |
| (e) | Iron oxide | (v) | Chemical change |
| (f) | Dissolving common salt in water | (vi) | Galvanisation |
Explain the characteristics of physical change with examples.
