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Science Class 9

Created by: Dr Manju Sen

Class 9 : Notes | EduRev

 Page 1


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
CBSE 
Class IX Science 
Sample Paper – 3 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be answered 
in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be answered 
in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name two processes which play an important role in the oxygen cycle. (1) 
 
2. List any two useful traits in improved crops.  (1) 
 
Section B 
 
3. What is sublimation? Name the substances that undergo sublimation.  (2) 
OR 
What is Brownian movement? 
 
4. How can reverberations in a large hall or auditorium be reduced?           (2) 
 
  
Page 2


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
CBSE 
Class IX Science 
Sample Paper – 3 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be answered 
in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be answered 
in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name two processes which play an important role in the oxygen cycle. (1) 
 
2. List any two useful traits in improved crops.  (1) 
 
Section B 
 
3. What is sublimation? Name the substances that undergo sublimation.  (2) 
OR 
What is Brownian movement? 
 
4. How can reverberations in a large hall or auditorium be reduced?           (2) 
 
  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
5. Observe the figure carefully and answer the questions which follow:  (2) 
(a) What is the role of P in the cell? 
(b) What will happen in the absence of Q in the cell? 
 
 
 
 
Section C 
 
6. Answer the following:  (3) 
(a) Define speed. State its SI unit. 
(b) What is meant by (i) average speed and (ii) uniform speed? 
(c) What is the difference between speed and velocity? 
 
7.  
(a) Give four general characters of Phylum Mollusca. (3) 
(b) Write two examples. 
 
8.   (3) 
(a) Why is it dangerous to jump from a moving bus? 
(b) Why does a cricketer move his hand backwards while catching a ball? 
 
9. A 0.24-g sample of a compound of oxygen and boron was found by analysis to contain 
0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the 
compound by weight. (3) 
 
10.  A maid working at Sarla’s place did not turn up for work as her daughter was down with 
diarrhoea. Hearing this, Sarla volunteered to take the child to the doctor. (3) 
(a) What could be the cause for the child’s illness? 
(b) What immediate help can be given to the child before taking her to the doctor? 
(c) What values are depicted by Sarla?  
Page 3


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
CBSE 
Class IX Science 
Sample Paper – 3 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be answered 
in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be answered 
in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name two processes which play an important role in the oxygen cycle. (1) 
 
2. List any two useful traits in improved crops.  (1) 
 
Section B 
 
3. What is sublimation? Name the substances that undergo sublimation.  (2) 
OR 
What is Brownian movement? 
 
4. How can reverberations in a large hall or auditorium be reduced?           (2) 
 
  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
5. Observe the figure carefully and answer the questions which follow:  (2) 
(a) What is the role of P in the cell? 
(b) What will happen in the absence of Q in the cell? 
 
 
 
 
Section C 
 
6. Answer the following:  (3) 
(a) Define speed. State its SI unit. 
(b) What is meant by (i) average speed and (ii) uniform speed? 
(c) What is the difference between speed and velocity? 
 
7.  
(a) Give four general characters of Phylum Mollusca. (3) 
(b) Write two examples. 
 
8.   (3) 
(a) Why is it dangerous to jump from a moving bus? 
(b) Why does a cricketer move his hand backwards while catching a ball? 
 
9. A 0.24-g sample of a compound of oxygen and boron was found by analysis to contain 
0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the 
compound by weight. (3) 
 
10.  A maid working at Sarla’s place did not turn up for work as her daughter was down with 
diarrhoea. Hearing this, Sarla volunteered to take the child to the doctor. (3) 
(a) What could be the cause for the child’s illness? 
(b) What immediate help can be given to the child before taking her to the doctor? 
(c) What values are depicted by Sarla?  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
11. A 20-g bullet is travelling at a speed of 400 m/s. It strikes a 1.5-kg target which is initially 
at rest and remains embedded in it. What is the speed with which the target will 
move? (3) 
OR 
The velocity–time graph for a moving body is given alongside. Find  (3) 
(a) Acceleration between points A and B 
(b) Acceleration between points B and C 
(c) Acceleration between points C and D 
 
 
12. A field with sunflower and groundnut is shown below. (3) 
 
(a) What pattern of cropping does the field show? 
(b) Mention any two advantages of this type of cropping pattern. 
OR 
(a) How can we obtain the maximum benefit from a crop field?  (3) 
(b) Which of the following crops would require a minimum quantity of fertilisers for its 
proper growth? Why? 
Paddy, Pea, Wheat, Sugarcane 
 
13. Among the electrons revolving around the nucleus, which electron will (3) 
(a) Determine the chemical properties of an element 
(b) Not determine the chemical properties of an element 
Give a reason for your answer. 
Page 4


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
CBSE 
Class IX Science 
Sample Paper – 3 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be answered 
in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be answered 
in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name two processes which play an important role in the oxygen cycle. (1) 
 
2. List any two useful traits in improved crops.  (1) 
 
Section B 
 
3. What is sublimation? Name the substances that undergo sublimation.  (2) 
OR 
What is Brownian movement? 
 
4. How can reverberations in a large hall or auditorium be reduced?           (2) 
 
  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
5. Observe the figure carefully and answer the questions which follow:  (2) 
(a) What is the role of P in the cell? 
(b) What will happen in the absence of Q in the cell? 
 
 
 
 
Section C 
 
6. Answer the following:  (3) 
(a) Define speed. State its SI unit. 
(b) What is meant by (i) average speed and (ii) uniform speed? 
(c) What is the difference between speed and velocity? 
 
7.  
(a) Give four general characters of Phylum Mollusca. (3) 
(b) Write two examples. 
 
8.   (3) 
(a) Why is it dangerous to jump from a moving bus? 
(b) Why does a cricketer move his hand backwards while catching a ball? 
 
9. A 0.24-g sample of a compound of oxygen and boron was found by analysis to contain 
0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the 
compound by weight. (3) 
 
10.  A maid working at Sarla’s place did not turn up for work as her daughter was down with 
diarrhoea. Hearing this, Sarla volunteered to take the child to the doctor. (3) 
(a) What could be the cause for the child’s illness? 
(b) What immediate help can be given to the child before taking her to the doctor? 
(c) What values are depicted by Sarla?  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
11. A 20-g bullet is travelling at a speed of 400 m/s. It strikes a 1.5-kg target which is initially 
at rest and remains embedded in it. What is the speed with which the target will 
move? (3) 
OR 
The velocity–time graph for a moving body is given alongside. Find  (3) 
(a) Acceleration between points A and B 
(b) Acceleration between points B and C 
(c) Acceleration between points C and D 
 
 
12. A field with sunflower and groundnut is shown below. (3) 
 
(a) What pattern of cropping does the field show? 
(b) Mention any two advantages of this type of cropping pattern. 
OR 
(a) How can we obtain the maximum benefit from a crop field?  (3) 
(b) Which of the following crops would require a minimum quantity of fertilisers for its 
proper growth? Why? 
Paddy, Pea, Wheat, Sugarcane 
 
13. Among the electrons revolving around the nucleus, which electron will (3) 
(a) Determine the chemical properties of an element 
(b) Not determine the chemical properties of an element 
Give a reason for your answer. 
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
OR 
(a) If Z = 11 for element A and Z = 12 for element B, then what would be the valency of 
the elements? Name elements A and B. 
(b) Explain isotopes with the help of suitable examples. 
 
14. Is it possible to turn liquid into vapour without heating? Explain your view.  (3) 
 
15. Give reasons:        (3) 
(c) It is difficult to pull out the husk of coconut. 
(d) Xylem and phloem are called complex tissues. 
(e) Erythrocytes of mammals carry much more haemoglobin in them as compared to 
other animals.  
 
  Section D 
 
16.  (5) 
(a) Define the term ‘energy’ of a body. What is the SI unit of energy? 
(b) What are the various forms of energy? 
(c) State what energy do the following objects possess: 
(i) A man climbing Mount Everest 
(ii) A stretched spring on the ground 
(iii) A man standing on the top of a building 
(iv) A formula one race car on a track 
 
17.   (5) 
(a) What are decomposers? 
(b) State their role in the ecosystem. 
(c) In which type of plants do nitrogen-fixing bacteria reside? 
(d) Explain the various forms in which carbon is found on the Earth.      
OR 
(a) With the help of a neat and labelled diagram, show the nitrogen cycle in nature. 
(b) Describe briefly any two processes involved in the cycling of N2 in the environment. 
 
18. Answer the following:  (5) 
(a) Temperature remains constant until the whole solid changes to liquid although heat 
energy is constantly supplied. Why?     
(b) Temperature remains constant during boiling although heat is constantly supplied. 
Why?           
(c) Ice has lower density than water. Why?  
Page 5


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
CBSE 
Class IX Science 
Sample Paper – 3 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be answered 
in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be answered 
in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name two processes which play an important role in the oxygen cycle. (1) 
 
2. List any two useful traits in improved crops.  (1) 
 
Section B 
 
3. What is sublimation? Name the substances that undergo sublimation.  (2) 
OR 
What is Brownian movement? 
 
4. How can reverberations in a large hall or auditorium be reduced?           (2) 
 
  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
5. Observe the figure carefully and answer the questions which follow:  (2) 
(a) What is the role of P in the cell? 
(b) What will happen in the absence of Q in the cell? 
 
 
 
 
Section C 
 
6. Answer the following:  (3) 
(a) Define speed. State its SI unit. 
(b) What is meant by (i) average speed and (ii) uniform speed? 
(c) What is the difference between speed and velocity? 
 
7.  
(a) Give four general characters of Phylum Mollusca. (3) 
(b) Write two examples. 
 
8.   (3) 
(a) Why is it dangerous to jump from a moving bus? 
(b) Why does a cricketer move his hand backwards while catching a ball? 
 
9. A 0.24-g sample of a compound of oxygen and boron was found by analysis to contain 
0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the 
compound by weight. (3) 
 
10.  A maid working at Sarla’s place did not turn up for work as her daughter was down with 
diarrhoea. Hearing this, Sarla volunteered to take the child to the doctor. (3) 
(a) What could be the cause for the child’s illness? 
(b) What immediate help can be given to the child before taking her to the doctor? 
(c) What values are depicted by Sarla?  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
11. A 20-g bullet is travelling at a speed of 400 m/s. It strikes a 1.5-kg target which is initially 
at rest and remains embedded in it. What is the speed with which the target will 
move? (3) 
OR 
The velocity–time graph for a moving body is given alongside. Find  (3) 
(a) Acceleration between points A and B 
(b) Acceleration between points B and C 
(c) Acceleration between points C and D 
 
 
12. A field with sunflower and groundnut is shown below. (3) 
 
(a) What pattern of cropping does the field show? 
(b) Mention any two advantages of this type of cropping pattern. 
OR 
(a) How can we obtain the maximum benefit from a crop field?  (3) 
(b) Which of the following crops would require a minimum quantity of fertilisers for its 
proper growth? Why? 
Paddy, Pea, Wheat, Sugarcane 
 
13. Among the electrons revolving around the nucleus, which electron will (3) 
(a) Determine the chemical properties of an element 
(b) Not determine the chemical properties of an element 
Give a reason for your answer. 
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
OR 
(a) If Z = 11 for element A and Z = 12 for element B, then what would be the valency of 
the elements? Name elements A and B. 
(b) Explain isotopes with the help of suitable examples. 
 
14. Is it possible to turn liquid into vapour without heating? Explain your view.  (3) 
 
15. Give reasons:        (3) 
(c) It is difficult to pull out the husk of coconut. 
(d) Xylem and phloem are called complex tissues. 
(e) Erythrocytes of mammals carry much more haemoglobin in them as compared to 
other animals.  
 
  Section D 
 
16.  (5) 
(a) Define the term ‘energy’ of a body. What is the SI unit of energy? 
(b) What are the various forms of energy? 
(c) State what energy do the following objects possess: 
(i) A man climbing Mount Everest 
(ii) A stretched spring on the ground 
(iii) A man standing on the top of a building 
(iv) A formula one race car on a track 
 
17.   (5) 
(a) What are decomposers? 
(b) State their role in the ecosystem. 
(c) In which type of plants do nitrogen-fixing bacteria reside? 
(d) Explain the various forms in which carbon is found on the Earth.      
OR 
(a) With the help of a neat and labelled diagram, show the nitrogen cycle in nature. 
(b) Describe briefly any two processes involved in the cycling of N2 in the environment. 
 
18. Answer the following:  (5) 
(a) Temperature remains constant until the whole solid changes to liquid although heat 
energy is constantly supplied. Why?     
(b) Temperature remains constant during boiling although heat is constantly supplied. 
Why?           
(c) Ice has lower density than water. Why?  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 3 
 
 
     
 
19. Briefly describe how to separate a mixture of (5) 
(a) Sulphur and sand 
(b) CuO and ZnO 
(c) Cream from milk 
(d) Iron filings and sugar 
(e) Kerosene oil and water 
OR 
(a) What is fractional distillation? List the two conditions essential for using fractional 
distillation as a method of separation of components of a mixture. 
(b) Which method is used to separate a mixture of two immiscible liquids? What is the 
principle behind this separation technique? 
  
20.   (5) 
(a) Which of the following do you think is a more basic characteristic for scientifically 
classifying organisms? Why?  
(i) Habitat (or place where they live) 
(ii) Cell type (or kind of cells they are made of) 
(b) You are given specimens of Leech, Nereis, prawn and scorpion. All these organisms 
have segmented body organisation. Will you classify them in one group? If not, state 
the important characters based on which you will separate them into different 
groups. 
 
21.   (5) 
(a) The Earth exerts more force on heavier bodies than on lighter bodies. Why is it that 
when dropped, heavier bodies do not fall faster than lighter bodies? 
(b) When two equal weights of unequal volumes are balanced in air, what will happen 
when they are completely dipped in water? Why? 
(c) An egg sinks when placed in water. What happens when salt is added to the beaker 
containing water? 
OR 
(a) Determine the value and units of the universal gravitational constant, G?  
(b) A stone is dropped from the edge of the roof. It passes a window 2 m high in 0.1 s. 
How far is the roof above the window?  
 
 
  
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