मराठी

Change of a bud into a flower is a change which cannot be reversed. Give four more such example. - Science

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प्रश्न

Change of a bud into a flower is a change which cannot be reversed. Give four more such example.

अति संक्षिप्त उत्तर
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उत्तर

Examples of irreversible changes.

  1. Milk into curd
  2. Burning of wood
  3. Ripening of fruits
  4. Digestion of food
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पाठ 6: Changes Around Us - Long Answer Questions [पृष्ठ ३६]

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एनसीईआरटी एक्झांप्लर Science [English] Class 6
पाठ 6 Changes Around Us
Long Answer Questions | Q 18. | पृष्ठ ३६

संबंधित प्रश्‍न

Long Answer Type Question:
Explain how a metal rim slightly smaller than a wooden wheel can be fixed on it.


Drying of wet clothes in air is an example of


When a candle is lit the following changes are observed.

  1. Wax melts.
  2. Candle keeps burning.
  3. The size of the candle decreases.
  4. The molten wax solidifies
  5. Which of the changes can be reversed? Justify your answer

When ‘Touch me not’ plant is touched by us, ______ changes occur.


Which of the following change cannot be reversed?


Paheli had bought a new bottle of pickle from the market. She tried to open the metal cap to taste it but could not do so. She then took a bowl of hot water and immersed the upper end of the bottle in it for five minutes. She could easily open the bottle now. Can you give the reason for this?


Give one example of change which occurs on heating but can be reversed.


Give one example of change which occurs on heating but cannot be reversed.


Paheli mixed flour and water and

  1. made a dough,
  2. rolled the dough to make a chapati,
  3. baked the chapati on a pan,
  4. dried the chapati and ground it in a grinder to make powder.

Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.


lt was Paheli’s birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following were the activities going on at Paheli’s home:

  1. Simba blew balloons and put them on the wall.
  2. Some of the balloons got burst.
  3. Paheli cut colourful strips of paper and put them on the wall with the help of tape.
  4. She also made some flowers by origami (paper folding) to decorate the house.
  5. Her father made dough balls.
    Mother rolled the dough balls to make puries.
  6. Mother heated oil in a pan.
  7. Father fried the puries in hot oil.

Identify the activities at Paheli’s home as those that can be reversed and those which cannot be reversed.


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