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प्रश्न
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
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उत्तर
Germination of seeds is considered a chemical change.
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संबंधित प्रश्न
Fill in the blank.
Changes that occur in nature are called ........................
State whether the following is physical or chemical changes.
cutting wood into small pieces —
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
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.
Which of the following are physical changes and which are chemical changes ?
Freezing of water
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
Natural changes which take place in nature on their own, are beyond the control of human being.
