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प्रश्न
Tick the most appropriate answer.
Physical changes are
विकल्प
permanent
periodic
temporary
irreversible
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उत्तर
temporary
APPEARS IN
संबंधित प्रश्न
Write short answer.
What are man-made changes ?
Solve this crossword by using the clues that follow.
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1. It is the change that takes place in case of swinging pendulum of a clock.
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change
Make a list of different types of changes with example.
True or false
In a physical change no net energy change is involved.
A physical change is temporary. Explain.
Change is the law of nature and occurs in our everyday life, at all times and in all places. Differentiate between the following change with a suitable example.
Desirable and undesirable change.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
What is the difference between dissolution of sugar and burning of sugar ?
Natural changes which take place in nature on their own, are beyond the control of human being.
Grinding of wheat grain changes its size. It is a ____________ change.
