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प्रश्न
What are man-made changes ?
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उत्तर
Man-made changes are those that occur because of human activities e.g. changing the direction of flow of a river by building a dam.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Making a fruit salad with raw fruits
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
State whether the following is physical or chemical changes.
Slaking of lime —
Write true or false
Burning of paper and formation of curd are reversible changes.
Give two examples of periodic changes.
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Sublimation of Iodine is a ______.
What kind of change is shown by tearing of paper?
