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प्रश्न
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
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उत्तर
Change of season is periodic change as it occurs at regular intervals. Change of weather is non-periodic change because it does not occur periodically at regular intervals. Weather can change suddenly and it may rain in the evening.
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संबंधित प्रश्न
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Melting of solid (wax) is a physical change.
State the differences between a physical change and a chemical change.
State whether the following is physical or chemical changes.
photosynthesis —
Write true or false
Rusting of iron is a chemical change.
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
What will you take into account while identifying the following?
A chemical change in a substance.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
Grinding of wheat grain changes its size. It is a ____________ change.
