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प्रश्न
Distinguish between the following.
Natural change and man-made change
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उत्तर
| Natural changes | Man-made changes | |
| 1. | The changes that are brought about by nature itself and are not under the control of humans are called natural changes. | The changes that are brought about by humans are called man-made changes. |
| 2. | Examples: change of season, tides in the sea, aging of plants, etc. | Examples: burning of fuels, cutting hair, switching on lights, etc. |
संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
What do you observe when :
solid ammonium chloride is heated
What do you observe when :
a spoon of sugar is heated in a pan
State whether the following is physical or chemical changes.
Boiling of an egg —
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
Under which different types can the following changes be classified?
Bursting of a cracker.
Under which different types can the following changes be classified?
Stretching of a spring.
Give reason.
A dry handkerchief gets wet at once on dipping in water, but it takes longer for a wet handkerchief to dry.
Paper, LPG, CNG petrol, etc, are ______ substances.
Cut vegetables turn brown when exposed to air, this is due to ______.
