1. Give two examples of irreversible changes:
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2. Can you change the shape of an eraser after erasing?
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3. Are all changes reversible?
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4. What kind of change is breaking of wood-reversible or irreversible?
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5. Give an example of reversible change.
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6. Water turns into which state when it becomes ice?
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7. Rusting of an iron is which type of change?
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8. Define evaporation.
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9. Why the stretching of a rubber band is reversible change?
_______________________________________________________________10. Why the burning of paper is an irreversible change?
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11. If we sharp a pencil its length decreases. Can this change be reversed?
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12. After baking a roti on tawa, it is not possible to get back the ball of dough
again. What type of change is this?
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13. A potter changes or shapes a lump of clay into a pot. Can this change be
reversed?
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14. A man is carrying a mirror. He suddenly drops a mirror and mirror is
broken. Can this change be reversed?
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15. A paper is changed into a shape of bat by cutting it. What kind of change it
is?
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16. A sheet of paper is folded to make an aeroplane. Then this paper is unfolded
again. Is the size of paper same as before or after making an aeroplane?
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Answers
Explanation:
1. - flour to dough and raw vegetables into cooked food.
2.No,we can not change the shape of an eraser after using it
3.No , all changes are not reversible.
4. It is a physical and irreversible change.
5. example- ice into water .
6. water is in solid state when it becomes ice.
7.It is w chemical change.
8.Evaporation is defined as the process in which the state of water from liquid to gaseous or to vapour state takes place.
9.It is a reversible change as after stretching the rubber band when we leave it , it comes to its normal size.
10.No, this is a irreversible change as we can't get the paper by the ash.
11.. It is a irreversible change.
12. it is a irreversible change
13. no, it can't be reversed.
14. no, it can't be reversed.
15. no it can't be reversed.
16. yes it will be same
Make me a brainlist
Answer:
1.conversion of milk to curd
breaking of a glass
2.yes
3.no
4.irreversible
5.sunrise and sunset
6.solid
7.irreversible
9.bcoz after it is released..it gets back to it's normal position
10.bcoz it turns into ash and ash can't be a paper.
11.no
12.irreversible
13.yes..
14.no
16.yes