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प्रश्न
State whether the following is physical or chemical changes.
water cycle in nature —
उत्तर
physical change,
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संबंधित प्रश्न
Changes in which only ______ properties of a substance change are called physical changes.
Ripening of fruits is a desirable change.
What are reversible and irreversible changes ? Give one example for each.
Write true or false
Cutting of paper into pieces is a chemical change.
Write true or false
Earthquake is a desirable change.
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
True or false
Change of seasons is a non-periodic change.
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.
Select the chemical changes from the following list of changes
Drying of a fruit
Explain the characteristics of physical change with examples.
