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प्रश्न
State whether the following is physical or chemical changes.
water cycle in nature —
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उत्तर
physical change,
APPEARS IN
संबंधित प्रश्न
Write true or false for the statement
A natural change can also be a desirable change
Write true or false for the statement
Decomposition of leaves is a fast 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 chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
Select the chemical changes from the following list of changes
Boiling of milk.
Select the chemical changes from the following list of changes
The occurrence of lightning.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
______ is the Universal Solvent.
