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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
Write true or false for the statement
Decomposition of leaves is a fast change.
Name two reversible changes.
State the Differences Between a Physical Change and a Chemical Change.
Classify the following as physical or chemical change :
Growth of a plant
Which of the following are physical changes and which are chemical changes ?
Freezing of water
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
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.
Compare the energy changes involved during a physical and a chemical change.
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
______ is the Universal Solvent.
