sample paper class 9 science

KENDRIYA VIDYALAYA AFS  SUMMATIVE  ASSESSMENT –II

SCIENCE (Theory) Class – IX

Time allowed: 3 hours                                                                                        Maximum Marks: 90

General Instructions:

a)     All questions are  compulsory.

b)     The question paper comprises of two sections, A and B. You are to attempt both the sections.

c)     Questions 1 to 3 in section A are one mark questions. These are to be answered in one word or in one sentence.

d)     Questions 4 to 7 in section A are two marks questions. These are to be answered in about 30 words each.

e)     Questions 8 to 19 in section A are three marks questions. These are to be answered in about 50 words each.

f)      Questions 20 to 24 in section A are five marks questions. These are to be answered in about 70 words each.

g)     Questions 25 to 42 in section B are multiple choice questions based on practical skills. Each question is a one mark question. You are to select one most appropriate response out of the four provided to you

Section A

1.            State the SI unit of  buoyancy.

2.            Atomic number of an element is 12. What is its   valency?

3.            Give two peculiar characteristics of  sponges.

4.            Give four properties of sound  waves.

5.            Find the electron distribution for the element that has atomic number 17 and write its valency.

6.            Write four main symptoms of jaundice or   hepatitis.

7.            A ship sends ultrasound that returns from the sea bed and is detected after 3.42 s. If the speed of ultrasound through sea water is 1531 m/s, what is the distance of the sea bed from the ship?

8.            Why is it difficult to the hold a school bag having strap made of thin and strong string?

9.            What are fluids? How does upthrust exerted by a fluid on an object immersed in it vary with density of fluid?

10.        An object of mass 15kg is moving with a uniform velocity of 4 ms-1 .what is the kinetic energy possessed by the  object?

11.        Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend,   going?

12.        Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium.

13.        Compare the properties of electrons, proton and   neutron.

14.        Calculate the number of Aluminum ions in 0.051 g of Al2O3. [Atomic mass of Al = 27 u, O = 16 u NA  = 6.022 x 1023  mol-1]

15.        What are acute and chronic diseases? Which one of the two are more harmful and why? Give an example in support of your  answer.

16.        Give an account of malaria giving its causative agent, symptoms and control measures.

17.        Sachin and Suhaas are friends and they study in the same class. Suhaas brings home made focod as lunch whereas Sachin eats Burger, chips and French fried during Lunch Break from school canteen. During a routine health check up in the school, Doctor finds Sachin overweight to his age. Both Sachin and Suhaas have read that Overweight leads to diabetes and Cardiovascular disease. Both of them now want to help other student so that no student could suffer from overweight.

a.         What value is shown by Sachin and  Suhaas?

b.         What should Sachin do now to keep his weight under   control?

c.         How can two boys help other  student?

18.        How do poriferan animals differ from coelenterate   animals?

19.        The difference in the mass 100 moles each of sodium atoms and sodium ions is 5.48002 g. Compute the mass of an electron.

20.        What are causes, symptoms and methods of prevention and cure of    AIDS?

21.        A light object and heavy object have same momentum. find out the ratio of their kinetic energies. Which one has large kinetic energy?

22.        Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it.

a.         How much work is done by the man in lifting the   box?

b.         How much work do they do in just holding it?

c.         Why do they get tired while holding it? (g = 10   m/s2)

23.        Draw the model of Rutherfords   experiment. Write its observations, conclusions and drawbacks.

24.        a.    What is sonar? Explain its use.

b.  A sonar station picks up a return signal after 3 seconds. How far away is the object?( speed of sound in water=1440 m/s)

Section B

25.  In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and some sodium ethanoate. What is the expected weight of sodium ethanoate?

26.  Draw well labeled diagram of  earthworm.

27.  A metal cube weighs 80 g. The water level in the measuring cylinder, before and after immersing metal cube is shown below. What will be the density of   cube?

28.  Which of the following is correct according to law of conservation of    mass?

A.                 Volume of reactants = volume of  products

B.                 number of reactants = number of  products

C.                 mass of reactants = mass of  products

D.                total number of atoms on reactants side = total number of atoms on  products side

29.  When we react lead nitrate and sodium chloride to get lead chloride and sodium nitrate so as to prove law of conservation of mass, which of the following statement is correct?

a.                  Mass of lead nitrate = mass of sodium  chloride

b.                 Mass of lead nitrate + mass of sodium chloride = Mass of lead chloride + mass of sodium nitrate

c.                  Mass of lead chloride + mass of sodium chloride = Mass of lead nitrate + mass  of sodium nitrate

d.                 Mass of sodium chloride + mass of sodium nitrate = Mass of lead chloride + mass of lead nitrate

30.  Which of the following are  monocots?

a.                  Orchid,  sugarcane, peas

b.                 Orchid, peas, bamboo

c.                  Peas,  bamboo, sugarcane

d.                 Orchid,  bamboo, sugarcane

31.  Which acts as an anti-coagulant in female   mosquitoes?

a.               Saliva

b.              Gastric juice

c.               Bile juice

d.              Acetic acid

32.  What do mosquitoes mostly use the for  senses?

a.                  Antennae

b.                 Eggs

c.                  Nose

d.                 Mouth

33.  Black dot-like structures seen in the underside of fern leaflets   are:

a.                  Seeds

b.                 Sori

c.                  Sporophylls

d.                 Spores

34.  The pressure exerted by the book due to thickness and front page on the ground areP1 and P2 respectively. Then,

a.                  P1=P2

b.                 P2=2P1

c.                  P1=2P2

d.                 P1>P2

35.  Weight of an object in air is 300N. Its weight in water will   be

a.                  300 N

b.         >300 N

c.         <300 N

d.         Zero

36.  The object immersed in a fluid floats in it with its top surface at fluid surface. Which of the following will be true?

a.                  The upthrust is greater than weight of the   object

b.                 The upthrust is less than weight of the  object

c.                  The upthrust is equal than weight of the  object

d.                 None of the above