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प्रश्न
Give two examples of periodic changes.
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उत्तर
Swinging of a pendulum
Rising and setting of the sun.
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संबंधित प्रश्न
Classify the following changes as physical or chemical:- photosynthesis in plants
State four differences between physical and chemical changes.
State whether the following is physical or chemical changes.
water cycle in nature —
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Stretching gold coin into a ring is a ______ change.
Distinguish physical and chemical changes.
Give two examples for the following case:
Physical changes which are reversible
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
