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प्रश्न
Write true or false
Earthquake is a desirable change.
विकल्प
True
False
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उत्तर
False
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संबंधित प्रश्न
Fill in the blank.
An earthquake is a .................. change.
Write short answer.
Give two examples of periodic 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
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Write true or false
Burning of sugar is a temporary change.
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
Distinguish between the following.
Physical change and chemical change
Mention a few physical properties of a substance.
Explain the characteristics of physical change with examples.
