Changes Around Us Online Test 6th Science Lesson 9 Questions in English

1. Which of the following is correct?
1. Change is the observable difference between initial state and the fi nal state of any substance.
2. Change is the Law of Nature.

2. Which of the following statement is correct?
1. Weather changes periodically (daily/ seasonly)
2. Seasons changes periodically

3. It takes a few___ for milk to turn into curd

4. Which of the following property of matter changes?
1. Shape
2. Temperature
3. Position
4. Composition

5. Which of the following is correct about Changes?

6. Which of the following are the basis of certain similarities and differences of Changes?
1. Slow and fast
2. Reversible and irreversible
3. Desirable and undesirable

7. Which of the following is an example of slow change?
1. growth of nail and hair
2. germination of seed
3. bursting of fire crackers

8. What’s the time taken by Slow changes to take place?

9. What’s the time taken by Fast changes to take place?

10. Which of the following is an example of fast change?

11. Which of the following is an example of Reversible change?
1. Touch me not plant
2. stretching of rubber band
3. melting of ice

12. Which of the following is incorrect about Reversible change?
1. Changes which cannot be reversed are known as reversible changes.
2. making idly from batter is an example of reversible change

13. Which of the following is an example of Irreversible change?
1. Change of milk into curd
2. melting of ice
3. making idly from batter

14. Which of the following is correct about Irreversible changes?
1. Changes which cannot be reversed or to get back the original state are known as Irreversible changes.
2. Change of milk into curd is an example of Irreversible change

15. Change of colour of cut apple is___ change

16. The change in shape of cut apple is called as____ change

17. Physical changes are the____ changes

18. Which of the following is correct about physical change?
1. No change in chemical composition
2. New substance is formed

19. Which of the following is an example of Physical change?
1. Melting of ice
2. solution of salt or sugar
3. stretching of rubber band

20. Which of the following are correctly matched?
1. water into steam on heating – vapourisation
2. water into ice on cooling – melting

21. Which of the following are incorrectly matched?
1. Steam into water on cooling – condensation
2. Ice into water on heating – melting

22. Water exists in three states as______
1. Solid
2. Liquid
3. Gas

23. Which of the following is correct?
1. Change of state takes place either by heating or cooling.
2. By heating energy is supplied and by cooling energy is taken away.

24. The change of state from solid to gas directly is called_____

25. Which of the following is an example of Sublimation?

26. The spreading of the solid particles among the liquid molecules is called as___

27. Which of the following is the correct statement?
1. Solute is a substance that dissolves the solvent.
2. Solute is a substance that is dissolved in a solvent to make a solution.

28.____ is known as the universal solvent.

29.____ dissolves a wide range of substance.

30. Chemical changes are the_____ changes

31. Which of the following statement is correct?
1. Chemical changes are the permanent changes in which there is change in the chemical composition
2. No new substance is formed.

32. Which of the following is not an example of chemical change?

33. Which of the following statement is correct?
1. Physical Change is reversible
2. Chemical Change is irreversible

34. Which of the following is an example of Desirable changes?

35. The changes which are useful, not harmful to our environment and desired by us are known as____

36. Which of the following is an example of undesirable change?

37. The changes which are harmful to our environment and not desired by us are known as__

38. Which of the following statement is correct?
1. Changes which take place in nature on their own and are beyond the control of human beings are known as Natural changes
2. The changes which are brought about by human beings are known as human made or artificial changes

39. Which of the following is an example of Natural changes?

40. Which of the following is not an example of Human made change?

41. Which of changes will not take place on their own?