Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
Write short answer.
Give an example of desirable change which can also be undesirable
Classify the following changes as physical or chemical:- photosynthesis in plants
Write true or false
Rusting of iron is a chemical change.
Write true or false
Burning of sugar is a temporary change.
Classify the following as physical or chemical change :
Growth of a plant
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
Select the chemical changes from the following list of changes
Change of seasons
______ is the substance that is dissolved in a solvent.
______ is the Universal Solvent.
