मराठी

Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.

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प्रश्न

Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.

अति संक्षिप्त उत्तर
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उत्तर

Examples of reversible changes.

  1. Melting of wax
  2. Folding of a paper
  3. Inflating a tyre or balloon
  4. Knitting of a sweater
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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
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 17. | पृष्ठ ३६

संबंधित प्रश्‍न

Very Short Answer Type Question:
Can you say deforestation is an irreversible or reversible change?


Very Short Answer Type Question:
Some common changes are given in the below Table. Which of these changes do you think can be reversed?

Change Can be reversed
(i) Raw egg to boiled egg Yes/No
(ii) Batter to idli  
(iii) Wet clothes to dirty clothes  
(iv) Woollen yarn to knitted sweater  
(v) Grain to its flour  
(vi) Cold milk to hot milk  
(vii) straight string to a cold string  
(viii) Bud to flower  
(ix) Milk to paneer  
(x) Cow dung to biogas  
(xi) stretched rubber band to its normal size  
(xii) Melting of ice-cream  

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


Evaporation of water is a reversible change.


Name the two types of changes.


What are reversible changes?


Salt can be separated from its solution (salt dissolved in water), because ______.


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


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


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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