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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
Try segregating the things around you as pure substances or mixtures.
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
Fill in the blank.
An earthquake is a .................. change.
State whether the following is physical or chemical changes.
glowing of a bulb -
State whether the following is physical or chemical changes.
water cycle in nature —
Write true or false
Rusting of iron is a chemical change.
What type of change is colouring of a paper?
Distinguish physical and chemical changes.
Natural changes which take place in nature on their own, are beyond the control of human being.
Give two examples for the following case:
Physical changes which are not reversible
