CBSE Board Class 9 Science Sample Papers 2010

Sample Paper – 2010
Class – IX
Subject –    Science                  
Time allowed: 3-3 1/2  hrs.        Maximum Marks: 80
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 to 14 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.Questions 27 to 41 are 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.
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1.What is meant by Buoyant force?       [1

2.Mention one function each of Golgi apparatus and Smooth Endoplasmic Reticulum (SER).      [1

3.Write dispersed phase and dispersed medium of emulsion. [1

4.What is echocardiography (ECG)?          [1

5.The atom of an element has 9 protons, 10 neutrons and 9 electrons. Mention its atomic number and mass number. [1

6.Where are chromosomes located?  What are they composed of?  What is chromatin    material and how does it change just before the cell divides?               [2

7.Give a diagrammatic representation showing the location of meristematic tissue in a     plant body.  Mention  any two characteristic features of meristematic tissues.   [2

8.Mention two initiatives taken for increasing the water availability for agriculture. How are these practices helpful?                  [2

9.(A) Write the names of the compounds represented by the formulae :                               [2
        (i)      CaCO3         (ii)     (NH4)2SO4
(B)   Calculate the formula unit mass of Na2O (Given atomic mass of Na = 23u, O = 16u)

10.The number of electrons in an outermost shell of sulphur is 6. What is its valency and   why? [2

11.(A)    Name the technique used to separate : 1
(i)      Mixture of sand and water (ii) Coloured pigment from blue/black ink
(B)    Differentiate between homogenous and heterogeneous mixture. 1

12.A man lifts two suitcases weighing 15kg and 5kg from the ground to a height of 1.5 m.  Calculate the work     [2
done by him on the suitcases.

13.(A) What is meant by 'Compression' and 'Rarefaction' of a longitudinal wave? 1
(B) Give well labelled graphical representation of a longitudinal wave. 1

14.Aditi clapped her hands near a cliff and heard the echo after 4 seconds.  What is the    distance of the cliff from her if the speed of sound is taken as 346 ms -1       [2

15.(A)   What are weeds? Why are they harmful to the growth of the crops? 2
(B)    What is meant by vermicompost’? 1

16.Draw a neat diagram of a plant cell and label any four organelles common in plant    and animal cell.                [3

17.(A)    Why is blood a connective tissue? [1
(B)     Compare the function of smooth muscle and cardiac muscle. [1
(C)    Where are the skeletal muscles located? [1

18.With the help of schematic representation of atomic structure of magnesium and sulphur, explain how are electrons distributed in different orbits?  [3

19.Differentiate between compound and mixture.  (Mention any three important points.)     

20.A solution contains ll0g of sugar in 500g of water.   Calculate the concentration in    terms of mass by mass percentage of the solution.          [3

21.(A)    What are infrasonic and ultrasonic sounds? [2
(B)     Why are ceilings of concert halls curved?                         [1

22.(A) State Archimedes principle. [1
(B)The relative density of silver is 10.8. Tine density of water is 103 kg m - 3. What is  the density of silver in SI units?  [2

23.(A) Which is greater, the attraction of the earth for 1 kg of iron or the attraction of   1 kg irons for the earth? Why?           [1
(B)  A boy throws a ball vertically upwards and catches it back in 10 s.  Calculate:     (i)      the velocity with which it was thrown up and     (ii)     maximum height attained by the ball.  (Take g = 10 ms-2)              [2

24.(A)    Name any two air-borne diseases. How does the disease causing microbe spread through air? [1
(B) How does HIV virus spread from a patient to a healthy person? Give any two   methods of transmission of this disease. [2
(C)    How does the immune system of our body function? [2

25.(A)    State the 'Law of conservation of mass' 1
(B)     Mention the postulate of Dalton's Atomic Theory that explains the Law of Constant Proportions. [1
(C)    Mention any two rules to write a chemical formula. [1+1
(D)    Write chemical formulae for the following compounds: [1
               (i)      Calcium hydroxide (ii)     Ammonium Sulphate

26.(A)Give reason for the following :
(i)      The kinetic energy of a freely falling object increases yet it holds law of   conservation of energy. [1
(ii)     A girl fills up 10 pages of a note book in order to practice sums yet she has not done 'work' in terms of Science/Scientific concept. [1
(iii)    Work done by gravitational force on an object moved along a horizontal path is zero. [1
(B)  Find the energy in kWh consumed in 24 hours by two electric devices, one of 100 W and other of 500 W. [2