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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
State the differences between a physical change and a chemical change.
A burning candle shows both physical and chemical changes. Explain ?
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
Which of the following are physical changes and which are chemical changes ?
Give four difference between physical and chemical changes.
Differentiate between a physical change and a chemical change with reference to – Formation of products.
State whether the following statement is true or false. If false write the correct statement.
Melting of butter and wax are examples of chemical changes.
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
______ is the Universal Solvent.
