Class 9 Science, CBSE Sample Paper with Marking Scheme, Solutions

 

CBSE Sample Question Paper | 9th CBSE Practice Paper
SCIENCE
Class IX Mock Test Paper with Marking Scheme, Solutions (SA II)        
M.M.-80                                                                                Time-3-31/2 hrs.
General Instructions:
1. Questions 1 to 5 are one mark questions. They are to be answered in one word or one sentence.
2. Questions 6 to14 are two marks questions. They are to be answered in about 30 words.
3. Questions 15 to 23 are three marks questions. They are to be answered in about 50 words. 
4. Questions 24 to 26 are five marks questions. They are to be answered in about 70 words.
5. Question 27 to41are multiple choice questions based on practical skills. Each question is a one mark question. You are to choose one most appropriate response out of the four a, b,c and d provided to you.

1 Which animal tissue is commonly known as packaging tissue?     1                                        
2. Calculate the formula unit mass of CaCO3 (given at masses: Ca = 40. 0µ, c=12 0µ, 0 = 16.0µ1
3. An ion M 3+ has 10 electrons and 14 neutons
   What is the atomic number and mass number of M ?     1
4. State the wave property that determines ‘pitch’ of sound.     1
5. How does the speed of sound change on increasing the temperature?      1
6. What do you mean by photoperiod? Name two processes that are dependent on photoperiod.    2
7. What will happen if:
    i) The skin epithelium is not stratified.
    ii) Stratified squamous epithelium lines blood vessels.      2
8. Name the target organ/organ system of AIDS virus. What is the cause of death in case of          
    people suffering from AIDS?      2                                                                                             
9. What is meant by (i) a solute and (ii) a solvent in a solution? Identify the solute and the solvent in a homogenous mixture of iodine and alcohol.      2
10. A housewife churned full cream milk with a milk churner.
     (i) What did she observe after churning milk?
     (ii) What could be the possible reason for this observation?             2
11. The average atomic mass of a sample of an element ‘X’ is 16.2µ. What is the percentage of
      each isotope  16X  and  18X in the sample?      2                                                                                                                                                                                                    
12. Why does a wooden block float and an iron block sinks when both are placed on the surface of
     water ?      2                                                                                                                     
13. The gravitational force of attraction between two masses is 16 N. What would be the force of attraction between them if each mass and the distance between them are doubled?      2
14. A child winds his toy car by moving its key. Name the type of energy –
      i) used up in the process
     ii) energy transformation taking place in it
       The car then runs on the floor of the room. Give the transformation of energy taking 
       place in it now.      2
15.  To increase productivity per unit area ,the farmers grow two different types of crops on  
        the same field in definite rows. What is this practice called? What care is required to be  
       taken before selecting two crops for such practice and why? Give any two reasons.      3                                                 
 16. Draw a neat diagram of the leaf epidermis showing pores through which exchange of gases   
      takes place. Label any two parts giving one function of each.       3  
17.   i) Which of the following diseases are protozoan in origin?    
  a) Dengue      b) Malaria          c) Kalaazar          d) AIDS
       ii) Suggest any two ways you would like to adopt, to prevent being infected by them.               
          3                                                      
18. Write two properties each of a solution, suspension and a colloid with respect to
      stability and filterability.      3           
19. (i) State ‘Law of constant proportions’.
      (ii) Taking the example of water, explain the law of constant proportions.
     (iii) Which postulate of Daltons’ atomic theory explains this law?                                 3

20.    (i) Write the names of the compounds represented by the following formulae:
             a) Na 2S                      b) KNO 3
        (ii) Write the chemical formulae of :
a)     Aluminum Chloride
b)     Magnesium oxide
             (iii) Find out the mass of 12.044 × 10 23 atoms of magnesium (Given at mass of  Mg = 24.0µ)            3          
21. A stone is dropped from the edge of the roof.
    a) How long does it take to fall 4.9 m?
    b) How fast does it move at the end of the fall?                                       
    c) What is its acceleration after 1s and 2s?                                              
         (given that g = 9.8 m/s2)                        

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