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SCIENCE TEST PAPER
CLASS : IX
ARMY PUBLIC SCHOOL, MHOW
SUMMATIVE ASSESSMENT – II : 2013 – 2014
SUBJECT : SCIENCE
Max. Marks : 100
SECTION : A (PHYSICS)
Time : 3 : 30 min.
I.
Question numbers 1 to 3 carry one mark each
1.
The setup which is best suited for verifying the laws of reflection of sound is :
2.
(a) A
(b) B
(c) C
(d) D
A man weighting 80 kg exerts pressure P1 when standing on both the feets on the ground and pressure P2 when
lying on the ground. The relation between P1 and P2 is
(a)
3.
P1  P2
(b)
P1  P2
(c) P1  P2
(d) P1  P 2/ 4
A student fixes two ends of a rope to two rigid supports A and B placed at a distance of 15 m. He then gives a
transverse horizontal jerk to create a pulse in the rope which moves from A to B, B to A, repeatedly. The pulse dies
after completing three, to and fro journeys from A to B and back. The pulse takes 2 minutes and 30 s to complete
its entire journey. The speed of the pulse moving on the rope is :
(a)
1.5 m/s
(b)
1.0 m/s
(c) 0.9 m/s
(d) 0.6 m/s
II.
Question numbers 4 to 7 carry two marks each
4.
7.
Find the least count of the spring balance having 10 divisions between 0 – 20 gwt marks.
An object of volume 25 mL suffers a loss in weight of 15 g wt. When immersed fully in a solution. Find the density
of the solution.
When a sound is reflected from a distant object, an echo is produced and heard on a winter night. Will you hear the
echo of the same sound on a summer day if the distance between reflecting surface and the source of sound remains
the same. Justify your answer.
State the laws of floatation.
III.
Question numbers 8 to 12 carry three marks each
8.
(a)
(b)
5.
6.
Name the type of energy possessed by a moving object.
Derive and expression for this energy for an object moving with velocity v and having mass m.
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9.
10.
In a factory 10 bulbs of 100 W each and 5 fans of 110 W each operate for 12 hours daily. Calculate the units of
electricity consumed. Also find the total expenditure if 1 unit costs Rs. 2.
With reference to sound what do you mean by frequency, wavelength and echo.
11.
A boy is sitting in the middle of a park of dimension 10m × 10m. On the right side of it there is a building
adjoining the park and on the left side, there is a road adjoining the park. A sound is produced by a cracker on the
road. Is it possible for the boy to hear the echo? Explain.
12.
A ship sends out ultrasound produced by transmitter that returns from the seabed and detected after 3 sec. If the
speed of ultrasound through sea water is 1530 m/s., find the distance of the sea-bed from the ship.
IV.
Question numbers 13 & 14 carry five marks each
13.
Define density and relative density. Give their mathematical formulae and SI units. Relative density of gold is 19.5.
The density of water is 1000 kg/m3. What is the density of gold in SI unit and in g/cc.
14.
Define relative density. Give its mathematical formula.
Define density. Give its SI unit.
A solid weight 80 g in air, 64 g in water. Calculate the relative density of solid.
When kept in water, state if the object would float or sink?
SECTION : B (CHEMISTRY)
I.
Question numbers 1 to 3 carry one mark each
15.
Barium Chloride + Sodium sulphate  Barium sulphate + Sodium Chloride
The type of chemical reaction represented by this chemical equation is :
(a)
16.
combination
(b)
decomposition
(c) displacement
(d) double displacement
2H2  O2  2H 2 O (Relative atomic masses H = 1, O = 16). The ratio of masses of hydrogen and oxygen in one
mole of water is :
(a)
17.
2:1
(b)
1:8
(c) 1 : 4
(d) 1 : 2
Study the composition of the two nuclei of two atomic species L and M and give the relation between the two.
L = protons 20 neutrons 20
M = protons 18 neutrons 22
II.
Question numbers 18 to 20 carry three marks each
18.
Read the information given in the table and answer the following questions :
19.
S. No.
Element
Atomic number
Mass number
1.
A
7
14
2.
B
6
12
3.
C
6
14
4.
D
8
16
5.
E
8
18
(i)
How many pairs of isotopes are there amongst the given atoms?
(ii)
Find a pair of isobars
(iv)
Find an element with 5 valence electrons
(v)
Calculate the number of different subatomic particles in atom C
(a)
Calculate the number of molecules of SO2 present in 44 g of it.
(b)
If one mole of oxygen atoms weighs 16 grams find the mass of one atom of oxygen (in grams).
(iii) Find an element with valency 2
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20.
Write the electronic configuration and valency of the following :
(i)
Chlorine
(ii)
Sodium
(iii) Silicon
III.
Question numbers 21 carry five marks each
21.
(a)
(b)
When 9.0 g of carbon is burnt in 24.0 g oxygen 33.0 g of carbon dioxide is produced. What mass of carbon
dioxide will be formed when 9.0 g of carbon is burnt in 50.0 g of oxygen? Which law of chemical
combination will govern your answer?
Magnesium and oxygen combine in the ratio of 3:2 by mass to form magnesium oxide. How much oxygen is
required to react completely with 12 g of magnesium?
SECTION : C (BIOLOGY)
I.
Question numbers 22 & 27 carry one mark each
22.
State the temperature range on the surface of the moon.
What was the modifications introduced by Cart Woese, in the classification proposed by Whittaker?
The correct labeling of parts A, B, C and D is :
23.
24.
25.
26.
27.
(a)
(A) – cytoplasm,
(C) – Nucleus
(B) – Chloroplast,
(D) – Cell wall
(b)
(A) – Chloroplast,
(C) – Cytoplasm
(B) – Nucleus,
(D) – Cell wall
(c)
(A) – Cell wall,
(C) – Nucleus
(B) – Cytoplasm,
(D) – Chloroplast
(d)
(A) – Chloroplast,
(C) – Nucleus
(B) – Cytoplasm,
(D) – Cell wall
In a biology laboratory, four students Archana, Bejoy, Charles and Denis were observing the seeds and flowers of
pea plants. They reported their observations that seeds and flowers of pea plant were :
Archana : monocotyledonous seeds and trimerous flowers.
Bejoy : monocotyledonous seeds and pentamerous flowers.
Charles : dicotyledonous seeds and trimerous flowers.
Denis : dicotyledonous seeds and pentamerous flowers.
The correct report is that of :
(a) Archana
(b) Bejoy
(c) Charles
(d) Denis
Which is a correct statement :
(a) plants with reticulate venation have a fibrous root system.
(b) plants with parallel venation have fibrous root system.
(c) plants with parallel venation have tap root system.
(d) plants with reticulate venation do not have a true root system.
Algae differ from Riccia and Marchantia in having :
(a) Thalloid body
(b) Multicellular body
(c) Multicelluar sex organs
(d) Pyrenoids in the cells
II.
Question numbers 28 & 29 carry two marks each
28.
29.
State two features of chronic diseases.
What are the functions of modified fore limbs in birds?
III.
Question numbers 30 to 33 carry three marks each
30.
The students of our school when visited a slum area, found many people suffering from malaria.
(a) Mention any two unhygienic conditions that must have prevailed in that locality
(b) Which preventive measures students should take to avoid infection of this disease during their trip?
Thallophyta, Bryophyta and Pteridophyta are cryptogams whereas.
Gymnosperm and Angiosperm are Phanerogams
(i)
Devise the meaning of cryptogams and Phanerogams.
(ii) Give one example of each of the above type of plant
31.
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32.
33.
How does nitrogen fixation take place during lightning? How do plants make use of the nitrates and nitrites present
in soil?
(a)
What are the consequences of global warming?
(b)
Name any three greenhouse gases.
IV.
Question numbers 34 to 36 carry five marks each
34.
Associate the following diseases/infections with their causative agents :
(a)
Sleeping sickness
(b) SARS
(c)
Kala-azar
(d) Acne
(e)
AIDS
(f) Dengue fever
(g)
Malaria
(h) Brain fever
(i)
Chicken-pox
(j) Polio
About a hundred years ago, when small pox persisted, a group of people who had this disease earlier and had
survived it had no change of suffering from it again. So, having the disease once was a means of preventing
subsequent attacks of the same disease.
(a)
Why does this happen? Explain.
(b)
We can ‘fool’ the immune system. Clarify.
(c)
Name this principle of prevention of diseases
(a)
Explain how forests influence the quality of our air, soil and water resources?
(b)
State two ways in which atmospheric carbon dioxide is fixed.
35.
36.
V.
37.
Question numbers 37 carry ten marks each
OPEN TEXT BOOK ASSESSMENT
(* Please ensure that open text of the given theme is supplied with this question paper)
(Theme – I (Clean Air – A shared Concern) : (5 + 5)
(a)
According to a US based study air pollution is the 5th largest killer in India. List the five most critically
polluted regions in the country according to this study. Mention the name of those gases and their sources
which add their releases into the air to make it polluted.
(b)
Although carbon dioxide is an important gas in the universe. Explain how it is necessary for the survival of
the survival of life on earth? What happens when there is gases which have the similar effect. Name the
phenomenon which they all lead to.
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COLONEL’S ACADEMY, MHOW
SUMMATIVE ASSESSMENT – II : 2015 – 2016
SUBJECT : SCIENCE
Max. Marks : 90
SECTION : A
Time : 3 : 00 hr
I.
Question numbers 1 to 3 carry one mark each
1.
The formula unit of mass of Na 2 O is 62U. Calculate the atomic mass of sodium (Na).
2.
3.
(given at. Mass of oxygen = 16)
Define :
(a) Atomic number
(b) Mass number
Write two points of difference between Protozoa and Poriferia.
II.
Question numbers 4 & 5 carry two marks each
4.
5.
A source produces sound waves of wavelength 1.2 m in air. If the same sound is produced in water, the wavelength
of the waves is 0.8. m if the speed of sound in air is 330 m/sec., find its speed of sound in water.
Why is depression less when a girl walks with flat shoes on the soft sand than with sharp heels?
III.
Question numbers 6 to 16 carry three marks each
6.
Calcium carbonate decomposes on heating to form calcium oxide and carbon dioxide. When 10g of calcium
carbonate is decomposed completely then 5.6g of calcium oxide is formed? Calculate the mass of carbon formed.
Which law of chemical combination will you use in solving this problem? State the law.
Define the following terms :
(a) Electric configuration (b) Valence shell
(c) Valency
Compare the subatomic particles of an atom with respect to their charge and mass.
List three major characteristics considered for classifying all organisms into five major kingdoms.
State three limitations faced in dealing with infections diseases.
Differentiate between ‘Healthy and Disease Free’ in terms of (i) nature of body functioning (ii) level of
7.
8.
9.
10.
11.
considerations.
12.
(a)
The volume of 40 gm of a solid is 15cm3. If the density of water is 1g/cm3, will the solid float or sink? State
reason.
(b)
Why is it easier to lift a heavy stone under water?
13.
Explain with the help of ka bell jar experiment that sound cannot travel in vacuum.
14.
Define potential energy. An object of mass 9 kg is at a certain height above the ground. If the potential energy of
the object at this height is 540J, find the height of the object above the ground. (g = 10 m/s2)
15.
(a)
A woman draws water from a well of 15 m depth in 15 s. If the mass of her bucket drawn is 10 kg, calculate
the power used by her.
(b)
16.
When an arrow is shot from a bow, from where will the arrow acquire its kinetic Energy?
Ravi is a poor labourer. For last few days he used to feel pain, in his lower abdomen as well as in his back. When
he went to a doctor, the doctor prescribed some clinical tests as well as ultrasonography of lower abdomen. When
Rita, who lived nearby came to know of this, she decided to give financial help to Ravi.
After tests and ultrasound it was found that there was a stone in the left kidney of Ravi. Rita asked her neighbours
to contribute for the operation. All the neighbours contributed for the operation as well as subsequent medical
expenses. Now Ravi is absolutely fit.
(a)
What is ultrasonography? Explain its working principle.
(b)
What values are shown by Rita and her neighbours?
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IV.
Question numbers 17 to 21 carry five marks each
17.
(a)
18.
19.
20.
21.
Write the chemical formulae of the following compounds showing the symbols of the constituent elements
and their valencies:
(i)
Ferrous sulphate
(ii) Calcium carbonate (ii) Sodium oxide
Classify organisms of kingdom protista on the following basis and give an example of each :
(a) Based on structure for locomotion
(b) Based of mode of nutrition
Explain giving reasons :
(a) Balanced diet is necessary for maintaining healthy body.
(b) Health of an organism depends upon the surrounding environmental conditions.
(c) Our surrounding areas should be free of stagnant water.
(d) Social harmony and good economic conditions are necessary for good health.
(a) Define relative density. Give its mathematical expression.
(b) Define density. Give its SI unit.
(c) A solid weighs 80 g in air and 64 g in water. Calculate the relative density of solid.
(d) When kept in water, state if the object would float or sink?
(a) Define power. Give its unit.
(b) A moving body of mass 20 kg has 40 Joules of kinetic energy. Calculate its speed.
(c) A person carrying a load of 20 kg climbs 4 m in 10 seconds. Calculate the work done and his power.
(g  10 m / s 2 )
SECTION : B (OTBA)
(* Please ensure that open text of the given theme is supplied with this question paper.)
Conservation of Water Bodies
22.
How does the construction of dams affect the temperature of water beyond the dams?
[2 marks]
23.
Lakes are socially beneficial. Give at least three points in favour of this statement.
[3 marks]
24.
What is the role of government and local authority in water conservation?
[5 marks]
SECTION : C
I.
Question numbers 25 to 33 carry one mark each
25.
When a sound wave gets reflected from a surface :
(a) the angle of reflection is always equal of 90º
(b) the angle of reflection is always equal to angle of incidence
(c) the angle of reflection is always less than angle of incidence
(d) the angle of reflection is always more than the angle of incidence
A gold biscuit of dimensions xm × ym × zm (where x > y > z) is placed on a table. The density of gold is d km/m 3.
The maximum pressure exerted by gold biscuit on the table is : (g = 10 ms-2)
(a) 10 xd
(b) xd
(c) 10 yz
(d) 10 zd
A wave passes from one medium to another. Name a property of wave which remains constant.
(a) Frequency
(b) Wavelength
(c) Amplitude
(d) Loudness
While locating the stem of fern, the students found that it is:
26.
27.
28.
29.
(a)
underground rhizome
(b) coiled like spring
(c)
totally absent
(d) branched and filamentous
While verifying the law of conservation of mass a student carried out the reaction between sodium chloride and
silver nitrate in a conical flask. Which of the following will appear as a precipitate?
(a)
Silver Chloride
(b)
Sodium Chloride
(c) Sodium Nitrate
(d) Barium Chloride
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30.
31.
32.
33.
Observe the following set-up of an experiment to verify the Law of Conservation of mass in a chemical reaction :
In the above set-up A, B, C and D are respectively :
(a) Cork, thread, conical flask and ignition tube
(b) Cork, wire, conical flask and ignition tube
(c) Cork, thread ignition tube and measuring cylinder (d) Cork, thread, ignition tube and conical flask
Flowers in a dicotyledonous plant are generally :
(a) trimerous
(b) tetramerous
(c) pentamerous
(d) both (b) and (c)
Choose the correct option that gives the best description of a dicotyledonous plant :
(a) trimerous flower, parallel venation, tap root
(b) pentamerous flower, reticulate venation, tap root
(c) pentamerous flower, parallel venation, fibrous root (d) trimerous flower, reticulate venation, fibrous root
Larva of a mosquito develops :
(a) on decaying material
(b) under the surface of water
(c) on the surface of water
(d) at the base of the water body
II.
Question numbers 34 to carry two marks each
34.
While determining the density of a metal block using a spring balance and a measuring cylinder, write the correct
sequence of steps to be followed in the experiment.
In an experiment to establish the relation between the loss in weight of a solid when fully immersed in tap and salty
water separately a student inferred the correct result as follows :
(Complete the result by filling appropriate words)
(a) The loss in weight of the solid immersed in the liquid is ___________ to the weight of the liquid displaced
by that solid, which proves the ___________ Principle.
(b) The loss in weight of the solid in strongly salty water is _____________ as compared to the tap water for the
same solid as up thrust in salty water is ____________ than in tap water.
(a) Why the body of bony fish is streamlined?
(b) List two habitats of bony fish.
35.
36.
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ARMY PUBLIC SCHOOL, MHOW
PRE SUMMATIVE ASSESSMENT – II : 2015 – 2016
SUBJECT : SCIENCE
Max. Marks : 90
SECTION : A
Time : 3 : 00 hr
I.
Question numbers 1 to 3 carry one mark each
1.
3.
Define molecular mass.
Give one important characteristic of canal rays.
Why does intake of penicillin not affect human cells?
II.
Question numbers 4 & 5 carry two marks each
4.
5.
State a suitable reason to explain why we use snow shoes to walk on snow.
Why do we hear the sound produced by the humming bees but the sound of vibrations of a simple pendulum is not
heard?
III.
Question numbers 6 to 16 carry three marks each
6.
State three rules for writing the chemical formulae.
Define the following terms :
(a) Electronic configuration
(b) Valence shell
(c) Valency
(a) Answer the following questions :
(i)
Name the scientist who discovered protons.
(ii) What is the charge and mass of a proton?
(iii) Where is proton located in an atom?
(b) An atom of an element has mass number 28 u and its atomic number is 14. How many neutrons does it have?
Also name the element.
(i)
Assign a group to an organism ‘X’ which has notochord in larval stage.
(ii) What would be the place of occurrence of ‘X’?
(iii) What would be the type of symmetry in ‘X’?
Which part of the body is attacked by the bacteria causing tuberculosis? If they enter :
(a) through the nose
(b) through the mouth
Give any two differences between angiosperms and gymnosperms giving one example of each.
Define work. State SI unit of work. Calculate the work done in pushing a cart through a distance of 4 m against the
force of friction equal to 150 N. Also state the type of work done.
(a) Explain why a ship made of steel floats on water but a steel needle sinks.
2.
7.
8.
9.
10.
11.
12.
13.
(b)
14.
Pin and nails are made to have pointed ends. Why?
A boy watches Dusshera celebrations from a distance and sees the effigy of Ravana burn into flames and hears the
explosion after 2 sec. How far was he from the effigy if in air depending up type of Particle motion & direction of
wave propagation?
15.
A car of mass 1000 kg starting from rest and moving with uniform acceleration covers a distance of 20 m is 2s.
Calculate the work done by the engine of the car during this time.
16.
An old man was standing on a bus stand carrying a very heavy luggage. Saurabh was looking at the old man and
finding him uncomfortable, requested him to put down the luggage and helped him in doing so.
(a)
Did the old man do any work while holding the luggage?
(b)
What is the equation for work done against gravity?
(c)
Why did Saurabh ask the old man to put down the luggage?
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IV.
Question numbers 17 to 21 carry five marks each
17.
(a)
Write the names of the following compounds :
(i)
Ca(OH)2
(ii)
Mg(NO3 )2
(iii) (NH 4 )2 SO4
(iv) NaCl
(b)
18.
19.
20.
How many grams of sodium will have the same number of atoms as 6 grams of magnesium? (Given Na = 23
u, Mg = 24 u)
Explain the meaning of the terms and give an example in each of the following :
(a) symbiotic relationship
(b) cotyledons
(c) cryptogam
(d) saprophytic
(e) prokaryotic
(a) What do signs and symptoms indicate if a person is suffering from any diseases?
(b) Based on the duration of disease what are the different categories of diseases? Differentiate between them
with one example each.
State how force is different from thrust.
Give the mathematical form that relates pressure and thrust.
Which will exert more pressure a 100 kg mass on area of 100 square cm OR a 50 kg mass on 25 square cm?
(g  10ms 2 )
21.
(a)
Explain the technique of ultrasonography
(b) Give its two applications.
SECTION : B (OTBA)
(*Please ensure that open text of the given theme is supplied with this question paper.)
22.
Discuss the pioneering efforts taken up for cloud seeding in drought prone regions of India.
[2 marks]
23.
Explain the initiative taken up by NRCP and NPCA in conservation of water bodies.
[3 marks]
24.
Describe the human factors responsible for drought situations. In what ways does it affect the environment? ]
[2 marks]
SECTION : C
I.
Question numbers 25 to 33 carry one mark each
25.
For effective reflection of sound, the tubes used in the experiment should have :
(a) equal lengths around 25 to 30 cm
(b) any length and may be unequal
(c) equal lengths but short
(d) no conditions on the length of the tube
Pressure is related to :
(a) Area of the bottom surface of the object
(b) Area of the top surface of the object
(c) Volume of the object
(d) Surface area of the whole object
An incident pulse reaches the fixed end of the slinky. This pulse will :
(a) end there
(b) be reflected back
(c) be refracted
(d) will start vibrating fast
Figures of two plants are given below. Observe them carefully and select the option which correctly gives their
identification and names of the groups to which they belong
26.
27.
28.
(a)
(b)
(c)
(d)
(i) moss : Bryophyte (ii) Fern : Pteridophyte
(i) Pine : Gymnosperm (ii) Leafy plant : Angiosperm
Both (i) and (ii) are mosses and belong to bryophyta
Both (i) and (ii) are ferns and belong to pteridophyta.
Page 10
29.
30.
In a chemical reaction 63.8 g of copper sulphate solution completely reacts with 42.4 g of sodium carbonate
solution. After the reaction 56.8 g of sodium sulphate and some amount of copper carbonate were formed. The
estimated mass of copper carbonate formed is :
(a) 43.4 g
(b) 56.4 g
(c) 106 g
(d) 49.4 g
Which of the following is the correct set up for observing the law of conservation of mass in a chemical reaction
before the solutions are mixed?
(a)
31.
32.
33.
(b)
(c)
(d)
Which of the following plants bears roots as shown in the figure below
(a) Gram plant
(b) Pea plant
(c) Rose plant
(d) Maize plant
If a plant has 5 sepals, 5 petals, 5 stamens, 5 carpels and has leaves with reticulate venation, then the plant belongs
to the group whose plants are :
(a) Monocotyledonous (b) Dicotyledonous
(c) Bryophyte
(d) pteridophyte
Which stage in the life cycle of a mosquito is depicted in the figure given below?
(a)
larva stage
(b)
egg stage
(c) pupa stage
(d) adult stage
II.
Question numbers 34 to 36 carry two marks each
34.
The volume of a stone is 25 cm3 and its density is 5.0 gm cm-3. Calculate the mass of the stone.
Based on the table of densities name the materials infer in which an object of density 5.07 g/cm3 would sink and
the materials on the surface of which it will float.
35.
36.
Material
Density g/cm3
Gasoline
0.7
Mercury
13.6
Paraffin (wax)
0.87
Molten lead
11.3
Enumerate any two adaptive features of Earthworm.
Page 11
ARMY PUBLIC SCHOOL, MHOW
SUMMATIVE ASSESSMENT – II : 2015 – 2016
SUBJECT : SCIENCE
Max. Marks : 90
SECTION : A
Time : 3 : 00 hr
I.
Question numbers 1 to 3 carry one mark each
1.
3.
Four samples of water are collected from different sources. Each sample on analysis was found to contain same
percentage of oxygen.
List two subatomic particles present in the nucleus of an atom.
Who proposed the system of binomial nomenclature for organisms?
II.
Question numbers 4 & 5 carry two marks each
4.
5.
Sound produced by thunderstorm is heard 10s after the lightening is seen. Calculate the approximate distance of the
thunder cloud. (Given speed of sound in air = 340 m/s)
Calculate the kinetic energy of a body of mass 20 kg moving with velocity of 0.1 m/s.
III.
Question numbers 6 to 16 carry three marks each
6.
Name the elements present in the following compounds :
(i)
Water
(ii) Lead nitrate
(iii) Copper chloride
(a) State two important postulates of Bohr’s model of an atom.
(b) If K ad L shells of an atom are full then what would be the total number of electrons in the atom?
State two points of difference between anion and cation & give one example each also.
What are phanerogams? How are their embryo get initial growth during germination? Classify this group into
further subgroups.
What are vectors? Name one commonest vector. Explain how the female organism of this vector spreads malaria.
(a) What is an antibiotic?
(b) Why taking an antibiotic is not effective in common cold?
(c) Name two diseases against which infants below one year are vaccinated.
(a) How much pressure will a man of weight 80 kg exert on the ground if :
(i)
He is lying and
(ii) He is standing on his feet? Given that area of the body of the man is 0.6 m2 and that of a foot is
0.008 m2.
(b) Name the device which is used for measuring the purity of milk.
(a) Find the distance of cloud from you when you hear a thunder 3 seconds after the lighting is seen. Given
2.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
speed of light  3 108 m / sec speed of sound = 330 m/sec.
(b) Why is lightening seen a few seconds before the thunder is heard during a thunderstorm?
Identify and state the type of transformation of energy in the following cases :
(a) when coal is burnt
(b) when a dry cell discharges (c) in a thermal power plant
State Archimede’s Principle. Explain its two applications.
Harsha was watching a programme based on ships on television. She saw a device attached to a ship through which
the man on the ship located the enemy submarines and sent the message to the headquarters.
(a) Name the device fitted in the ship
(b) On which principle does the device work?
(c) What values are shown by Harsh (any 2 values)?
IV.
Question numbers 17 to 21 carry five marks each
17.
(a)
(b)
Give any two points of difference between isobars and isotopes.
A and B are two elements with the following sub-atomic particles.
A-protons 8, neutrons 8.
B-protons 8, neutrons 9.
What is the atomic mass of A and B? How are they related to each other?
Page 12
18.
19.
20.
21.
Identify the phylum of kingdom animalia in which the animal has :
(a) A pseudocoelom
(b) A water – driven tube system
(c) Jointed legs
(d) Pores in the body leading to a canal system
(e) Notochord at some stages of their life
(i)
What is a disease? Explain the various types of diseases giving one example of each.
(ii) Define Health what is the importance of vaccination?
(a) Define 1 KWh.
(b) A crane is lifting a body of mass m to a height ‘h’ against gravity in time ‘t’. Find the Power consumed in
lifting the object.
(c) If an electric iron of 1600 W is used for 45 minutes every day, find the electric energy consumed in the
month of March in its commercial unit.
(a) Define relative density. Give its mathematical form.
(b) The mass of an iron cube having volume 3.375 cm3 is 50 g. Find its density in g/cc.
(c) The volume of a 250 g sealed tin is 400 cubic cm. Find the density of the tin in g/cc. State if the object would
sink or float in water.
SECTION : B (OTBA)
(* Please ensure that open text of the given theme is supplied with this question paper.)
Conservation of Water Bodies
22.
Write a slogan on Repair, Renovation and Restoration programme of water bodies and mention what efforts can be
made to implement the same.
[2 marks]
23.
With the help of a flow chart show the effects of drought? (any three)
[3 marks]
24.
“Save Water, Save Life” is the agenda on which we have to work, what can be done to save water on earth and
everyone should contribute in this? What suggestion can you give to others so that they are also able to play their
[5 marks]
role effectively?
SECTION : C
I.
Question numbers 25 to 33 carry one mark each
25.
In a sound wave which is longitudinal wave, particles of the medium :
(a) move in a direction perpendicular to the direction of propagation of wave
(b) vibrate about their mean positions in the direction of wave
(c) vibrate about their mean positions perpendicular to the direction of wave
(d) move in the direction of propagation of wave
In an experiment to calculate the pressure exerted by a solid iron cuboid on a fine sand, the pressure will be
decreased if :
(a) Thrust is increased
(b) Area is increased
(c) Thrust and area both are increased
(d) None of the above
The distance between initial and final position of the pulse produced in a slinky is 6 m and the velocity is 7.2 m/s.
The time taken by pulse to propagate is :
(a) 1.2 sec
(b) 0.83 sec
(c) 10.8 sec
(d) 1.6 sec
Which group does Spirogyra belong?
(a) Thallophyta
(b) Fungi
(c) Bryophyta
(d) Pteridophyta
26.
27.
28.
Page 13
29.
30.
31.
32.
33.
Which one of the following chemical reaction is not suitable in the school laboratory to verify the law of
conservation of mass?
(a) Mixing Barium Chloride and Sodium sulphate solutions
(b) Mixing Hydrochloric acid and Sodium hydroxide solutions
(c) Mixing Potassium iodide and lead nitrate solutions
(d) Thermal decomposition of potassium chlorate
To verify the law of conservation of mass in a chemical reaction four students A, B, C and D performed the
following chemical reactions.
(A) Added Barium chloride solution to sodium sulphate solution in a conical flask and closed the flask with cork
(B) Heated lead nitrate (solid) in an open test tube
(C) Added copper sulphate solution to sodium carbonate solution in a conical flask and closed the flask with
cork
(D) Added lead nitrate solution to sodium chloride solution in a conical flask and closed the flask with a cork
The student who is likely to get wrong result is :
(a) (A)
(b) (B)
(c) (C)
(d) (D)
From the plants given below the plant in the leaves of which reticulate venation is found :
(a) Maize
(b) Rose
(c) Lily
(d) Bamboo
A student observed a leaf and identified its venation as parallel venation. The same kind of venation is
characteristic of the plant which is :
(a) hibiscus
(b) grass
(c) tulsi
(d) mustard
The least active stage in the life cycle of a mosquito is :
(a) Imago
(b) Larva
(c) Pupa
(d) Adult
II.
Question numbers 34 to 36 carry two marks each
34.
The figures below show a spring balance and a measuring cylinder. Find the least count of spring balance and
measuring cylinder.
35.
In which of the two, glycerine or kerosene, the loss in weight of a solid when fully immersed in them will be more
and why?
Nam two specific features of the fish due to which they are categorized under phylum pisces.
36.
Page 14
……………………………………….
SUMMATIVE ASSESSMENT – II : 2015 – 2016
SUBJECT : SCIENCE
Max. Marks : 90
I.
1.
2.
3.
II.
4.
5.
III.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
IV.
17.
SECTION : A
Time : 3 : 00 hr
Question numbers 1 to 3 carry one mark each
What do you mean by chemical formulae?
Give one important characteristic of canal rays.
How does the infection spread from an unhealthy person to a healthy person?
Question numbers 4 & 5 carry two marks each
Audio frequency range of a human ear is 20 Hz to 20, kHZ. Express the range in terms of time period.
Differentiate between thrust and pressure. List two points of difference.
Question numbers 6 to 16 carry three marks each
Calculate the molecular mass of the following :
(a) Chlorine gas
(b) Ammonia gas
(c) Sulphur trioxide gas
(Give atomic mass of Cl = 35.5 u, N = 14 u, H = 1u, S = 32u, O = 16 u)
Draw a diagram of the Thomson’s model of an atom. Why was it discarded?
(a) (i)
Name the scientist who discovered neutrons.
(ii) State the charge and mass of a neutron.
(iii) Where is neutron located in an atom?
(b) Helium atom has an atomic mass of 4u and two protons in its nucleus. How many neutrons does it have?
(a) In what way, amphibians are advanced than the fishes?
(b) Name the class of animals which are found both in water and on land. Give one example.
Explain the process of inflammation. Mention the local effects and the general effects of inflammation.
A fungal and an algal species live in mutually dependent relationship. Justify their interedependence in nature and
name this relationship?
(a) The volume of 40 g of a solid is 15cm3. If the density of water is 1g/cm3, will the solid float or sink? State
reason.
(b) Why is it easier to lift a heavy stone under water?
(a) Define :
(i)
infrasonic wave
(ii) Ultrasonic wave
(b) Name two species each of animals which can produce and detect
(i)
infrasonic waves
(ii) ultrasonic waves
(a) Illustrate the law of conservation of energy by discussing the energy changes which occur when we draw a
pendulum bob to one side and allow it to oscillate.
(b) Which has greater effect on the Kinetic Energy of an object : doubling the mass or doubling the velocity?
Calculate the work required to be done to stop a car of 1200 kg moving at a speed of 54 km/h.
Seema and her younger brother Nikhil were playing in a park. Suddenly dark clouds appeared in the sky and there
was Thunder and lightning soon it started raining heavily. Nikhil started crying. Seema who is a student of class
IX, consoled her brother, by saying that thunder and lightning are natural phenomena not to cry. Seema told her
brother that lightning is a season.
(a) We can see light coming from a distant star but cannot hear sound of explosion taking place there. Give
reason.
(b) What values / qualities are shown by Seema.
(c) State the cause of thunder.
Question numbers 17 to 21 carry five marks each
(a) State the meaning of polyatomic ions. Mention any two examples.
Page 15
(b)
(c)
18.
19.
20.
21.
Write chemical formula of copper nitrate.
Calculate the mass of the following :
(i)
10 moles of sodium sulphite (Na2SO3)
(ii) 4 moles of aluminium atoms [At mass of Na = 23 u, S = 32 u, O = 16 u, Al = 27 u]
State one difference between each of the following :
(a) Thallophyta and Bryophyta
(b) Bryophyta and pteridophyta
(c) Pteridophyta and gymnosperm
(d) Gymnosperm and angiosperm
(e) Monocotyledonous and dicotyledonous plants
(a) What kind of food is advised when we fall sick and why?
(b) Mention any three basic conditions required for good health.
(a) State Archimedes’ principle
(b) Why is it easier to swim in sea water than in river water?
(c) Explain the reason that the cork floats in the water where as an iron nail sinks.
Calculate the electricity bill amount for a month of 30 days, if the following devices are used as specified :
(a) 2 bulbs of 40 W for 6 hours
(b) 2 tubelights of 50 W for 8 hours
(c) A TV of 120 W for 6 hours
Given the cost of electricity is Rs. 2.50 per unit.
SECTION : B (OTBA)
(*Please ensure that open text of the given theme is supplied with this question paper.)
Conservation of Water Bodies
23.
How do forests influence the water resources?
[2 marks]
Are you aware of any activity which may be polluting the water source in your locality? Specify it. What would
24.
you do to solve this issue?
[3 marks]
What indicates that the river water is polluted and can no longer be used for human consumption? How can we as
22.
responsible citizens help in conservation of rivers that are the lifelines of our survival?
[5 marks]
SECTION : C
I.
25.
Question numbers 25 to 33 carry one mark each
For reflection of sound by a metal plate, the graph which shows the correct relation between the angle of incidence
and angle of reflection.
26.
(a) A
(b) B
(c) C
(d) both (A) and (B)
A student is doing an experiment to find the pressure exerted by an iron cuboid of mass 10kg on ground as shown
below (g = 10 ms-2) :
The pressure exerted by the shaded portion of the cuboid when placed on the ground is (g = 10 ms-2)
(a)
5 104 Pa
(b)
2 104 Pa
(c) 4.5 104 Pa
(d) 3 104 Pa
Page 16
27.
28.
29.
30.
Which of the following will cause the change in speed of the pulse :
(i)
increasing distance between two ends of slinky
(ii) decreasing number of truns in slinky
(iii) changing the material of the slinky
(iv) changing the radius of each turn of slinky
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (iii) and (iv)
(d) (ii) and (iii)
Observe the figure given here. Which of the following does it represent?
(a) Female cone of pinus (b) Male cone of pinus
(c) Rachis of Fern
(d) Annulus of Agaricus
Aqueous solutions of silver nitrate and sodium chloride are made to react in a closed vessel. Which of the
following observations is correct?
(a) A white precipitate is formed
(b) A blue precipitate is formed
(c) A gas is evolved with effervescence
(d) A show reaction takes place
Given below is a chemical equation to show the formation of iron sulphide by heating a mixture of iron and
32.
sulphur : Fe  S 
 FeS
Calculate the mass in g of sulphur unreacted when 28g of iron reacts with 22g of sulphur to form 44g of iron
sulphide. Mass of unreached sulphur is :
(Relative atomic masses : Fe = 56u and S = 32 u)
(a) 22 g
(b) 6 g
(c) 16 g
(d) 12 g
From the plants given below a dicotyledonous plant is :
(a) Maize
(b) Rose
(c) Lily
(d) Bamboo
Observe the diagram below and identify it. It is :
33.
(a) trimerous flower of monocotyledonous plant
(b) trimeruous flower of dicotyledonous plant
(c) pentamerous flower of monocotyledonous plant
(d) pentamerous flower of dicotyledonous plant
Which stage of life cycle of mosquito is represented in the figure given below?
31.
(a)
II.
34.
35.
36.
Pupa
(b)
Nymph
(c) Adult
(d) Caterpillar
Question numbers 34 to 36 carry two marks each
You are given a sphere of volume 33 cm3. If you are asked to select a best suited spring balance to determine its
weight, then what should be the range of the spring balance? (The sphere is made of an alloy of density 7 g cm-3)
A student noted down the weight of an object in air, tap water and salty water, as 70 gm wt, 60 gm wt and 65 gm
wt respectively. Are his observations correct? Explain.
Which fins help the fish in balancing and movement?
Page 17
SHRI VINAY MANDIR
SUMMATIVE ASSESSMENT – II : 2015 – 2016
SUBJECT : SCIENCE
Max. Marks : 90
SECTION : A
Time : 3 : 00 hr
I.
Question numbers 1 to 3 carry one mark each
1.
3.
Who established the laws of chemical combination?
Define the term ‘Isobar’ with one example.
How does the infection spread from an unhealthy person to a healthy person?
II.
Question numbers 4 & 5 carry two marks each
4.
5.
Why can’t we hear an echo in a small room?
A moving car weighing 1200 kg is stopped by applying brakes which produce negative acceleration of 9 ms-2 and it
covers 50 metres before coming to rest. Calculate the amount and type of work done after application of brakes.
III.
Question numbers 6 to 16 carry three marks each
6.
Define polyatomic ion. Write two examples along with their formulae.
(a) Define isotopes.
(b) List any two applications of isotopes in the field of medicine.
(a) How many electrons are present in the valence shell of nitrogen, oxygen and argon?
(b) Nucleus of an atom has 5 protons and 6 neutrons. What is the atomic number, mass number and electronic
configuration of the atom?
State the mode of nutrition of organisms which belong to the following kingdoms : Monera, Protista and Fungi.
Give one example of organism in each case.
State giving reasons whether the following statements are correct or not.
(i)
Our surrounding area should be free from stagnant water.
(ii) Staying clean is not necessary as long as you eat a balanced diet.
(iii) Social equality and harmony are necessary for good health.
(a) Why was the need to write scientific names for organisms? Who introduced the system of scientific naming?
(b) What are the two Latin forms in a scientific name of an organism?
(a) Why does a bucket of water feel heavier when taken out of water?
(b) Lead has greater density than iron and both are denser than water. Is the buoyant force on a lead object
greater than, less than or equal to the buoyant force on an iron object of the same volume?
(a) Define reverberation? How can it be reduced?
(b) An echo returned in 4 s. What is the distance of the reflecting surface from the source given that speed of
sound in air is 344 m/s.
A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a
larger kinetic energy?
(a) Relative density of gold is 19.5. The density of water is 1000 kg/m-3. Find the density of gold in SI unit and
in g/cc.
(b) The radius of solid gold sphere is 0.25 cm. If density of gold is 19.5 g/cc. Calculate its mass.
Ashish had a pain in his ear as he pricked it with a Pin. The doctor advised that we should take care of our ears and
2.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
protect them from damage.
(a)
Why we must not prick with hard and pointed things inside our ears?
(b)
What is the function of ear drum in the ear?
(c)
What values are depicted by the doctor?
Page 18
IV.
Question numbers 17 to 21 carry five marks each
17.
(a)
18.
19.
20.
21.
A sample of vitamin C is known to contain 2.58 × 1024 oxygen atoms. How many moles of oxygen atoms are
present in the sample?
(b) Write one word for the following :
(i)
In a balanced chemical equation, the sum of the masses of reactants and products remains unchanged.
(ii) A group of atoms carrying a fixed charge on them.
(c) Write chemical formulae of the following compounds :
(i)
Sodium phosphate
(ii) Ammonium carbonate
A blue whale lives in water, a bat can fly and man can walk on two feet, still these animals are grouped together.
Name the group and state the basis of their grouping by giving four points.
(a) Why is immune system essential for our health?
(b) Name the disease in which our immune system is destroyed.
(c) Why is that other minor infections kill people suffering from this disease? Explain by giving two examples.
(a) Define 1 KWh.
(b) A crane is lifting a body to a height ‘h’ in time ‘t’. Find the relation between the power of crane to the speed
at which it is lifting the object.
(c) If an electric iron of 1600 W is used for 45 minutes everyday, find the electric energy consumed in the
month of March.
(a)
A body floats in kerosene of density 0.8  103 kg / m 3 up to a certain mark. If the same body is placed in
water of density 1.0  103 kg / m3 , will it sink more or less? Give reason for your answer.
(b)
If a fresh egg is put into a beaker filled with water, it sinks. On dissolving a lot of salt in the water, the egg
begins to rise and then floats. Why?
SECTION : B (OTBA)
(*Please ensure that open text of the given theme is supplied with this question paper.)
Conservation of Water Bodies
[2 marks]
22.
State any two factors due to which rapid depletion of fresh water resources has occurred.
23.
Water is a renewable source of energy which can never be exhausted but still we all talk about water conservation.
[3 marks]
Why?
24.
What lessons are learnt from the project carried out in Tikamgarh district of Madhya Pradesh in order to conserve
[5 marks]
water and the water bodies?
SECTION : C
I.
25.
26.
27.
Question numbers 25 to 33 carry one mark each
Speed of sound in solids and liquids is :
(a) zero
(b) more than that in gases
(c) less than that in gases
(d) same as in gases
A man weighing 80 kg exerts pressure P1 when standing on both the feets on the ground and pressure P2 when
lying on the ground. The relation between P1 and P2 is
P1  P2
P1  P2
(a)
(b)
(c) P1  P2
(d) P1  P2/ 4
For doing the experiment on measuring the velocity of a pulse though a stretched string we use a string and fix its
one end to a hook on a wall. We should prefer :
(a) a 3 m long thin tightly knit cotton string held very tight.
(b) a 3 m long thick loosely knit cotton string held very tight.
(c) a 10 m long thick loosely knit jutes string held just tight.
(d) a 10 m long thick tightly knit cotton string held just tight
Page 19
28.
29.
30.
31.
32.
33.
The mode of nutrition in agaricus is :
(a) Parasitic
(b) Saprophytic
(c) Holozoic
(d) Symbiotic
Aditi was asked by her Science teacher to carry out an experiment to verify the law of conservation of mass. Four
Sets of apparatus are kept in chemistry laboratory at four places. The teacher asked Aditi to select the apparatus
herself. Which of the following sets is most appropriate?
(a) Conical flask, physical balance, cork, ignition tube (b) Conical flask, physical balance, ignition tube
(c) Conical flask, physical balance
(d) Conical flask, physical balance, cork ignition tube, thermometer
8.4 g of sodium carbonate was added to a solution of 20 g of ethanoic acid. The residue left behind weighed 24 g
and the carbon dioxide released weighed 4.4g. The above observation concludes
(a) Law of conservation concludes
(b) Law of constant composition
(c) Does not follow law of conservation of mass
(d) None of the above
Plant A has leaves with reticulate venation and its flowers consist of 5 petals. Plant B has leaves with parallel
venation and its flowers have three petals on the basis of above observations which of the following given
statement needs correction.
(i)
Plant A is dicot plant
(ii) Plant B is monocot plant
(iii) Plant A consists tap – root
(iv) Plant B has two cotyledons
(a) (i)
(b) (ii)
(c) (iii)
(d) (iv)
Radhika was given a plant, to identity it as dicotyledonous or monocotyledonous plant. The observations on the
basis of which she identified the plant as dicotyledonous are :
(a) fibrous root and parallel venation
(b) tap root and parallel venation
(c) tap root and reticulate venation
(d) fibrous root and reticulate venation
Out of the following statements regarding the different stages in the life cycle of a mosquito which one is
incorrect?
(a) The eggs of mosquito are deposited on stagnant water
(b) The larvae hatch out from the eggs within a few hours
(c) The larva stage is followed by the pupa stage
(d) From the pupa an adult mosquito emerges.
II.
Question numbers 34 to 36 carry two marks each
34.
A spring balance used for measuring mass of the cuboid has a least count of 2 gwt. Two students using the same
spring balance noted two different readings, 46 gwt and 47 gwt. Which reading is correct and why?
State Archimedes’ Principle?
Write two important aerial adaptations of birds.
35.
36.
Page 20
ST. MARY’S H.S. SCHOOL, MHOW
SUMMATIVE ASSESSMENT – II : 2015 – 2016
SUBJECT : SCIENCE
Max. Marks : 90
SECTION : A
Time : 3 : 00 hr
I.
Question numbers 1 to 3 carry one mark each
1.
The formula unit of mass of Na2O is 62U. Calculate the atomic mass of sodium (Na). (given at mass of oxygen
(16)
List three isotopes of Hydrogen along with their symbols.
Name the disease you are more likely to catch from the below mentioned communicable diseases and why? While
sitting next to one who is suffering from pneumonia or another who is suffering from typhoid?
2.
3.
II.
Question numbers 4 & 5 carry two marks each
4.
5.
Roofs and walls of the auditoriums are generally covered with sound-absorbing materials. Why?
State the mathematical expression for kinetic energy and potential energy. Give an example where an object
possesses both type of energy.
III.
Question numbers 6 to 16 carry three marks each
6.
What is meant by the term chemical formula? Write the chemical formula of Calcium carbonate. Calculate its
formula unit mass. (Atomic mass of Ca = 40 u. C = 12u. O = 16 u)
(a) What are valence electrons? Give example.
(b) State the property of an element which can be used for its identification.
State any four postulates of Dalton’s atomic theory of matter. Which of his postulates does not hold correct at
present?
Name the scientist who proposed two kingdoms classification of living organisms? Name those kingdoms. Write
major drawback of the above proposed classification.
Fill in the following table :
7.
8.
9.
10.
11.
12.
13.
14.
15.
Sl. No.
Disease
Point of entry
Target Organ
1
Japanese Encephalitis
(a)
(b)
2
HIV
(c)
(d)
3
Tuberculosis
(e)
(f)
Classify the following organisms on the basis of absence or presence of true coelom (i.e. Coelomate, Acoelomate
and pseudocoelomate) :
Ascaris, Herdmania, Earthworm, Planaria, Fishes, Humans
Dev while watching a show named “Mega-structures” on television observed that metal blocks are used in the
construction of big-structures. Workers for detecting flaws or defect inside the metal blocks were using ultrasound.
His brother asked him about this technique. Dev explained it to him.
(a) What is ultrasound? Write its two other applications
(b) What value is depicted from Dev’s behaviour?
Draw a graph to represent the frequency and wavelength of a wave Mark the two on the graph and also give their
SI units.
(a) A household has a 100 W lamp lighted for 2 hours two 60 W lamps lighted for 4 hours and an electric far of
50 W working for 8 hours a day. Calculate the electric units consumed each day.
(b) What energy transformation takes place in :
(i)
Dry cell
(ii) Electric fan
(a) Name and state the principle used to check purity of milk by lactometer.
(b) Explain of its two applications.
Page 21
16.
Namita was watching ‘amazing science’ on television. It was shown that a sonar device attached to a ship sends
ultrasonic waves in the sea. These waves are reflected from the bottom of the sea. Ultrasonic waves took four
seconds to travel from the ship to the bottom of the sea and back to the ship. Namita as she is a student of grade IX
started calculating the depth of the sea.
(a) Help Namita to calculate the depth of the sea if speed of sound in sea water is 1500 m/s.
(b) What value of Namita’s nature are depicted from this context?
IV.
Question numbers 17 to 21 carry five marks each
17.
(a) Atom is considered electrically neutral. Explain.
(b) State the valency of Helium.
(c) If an atom has atomic mass 4 and 2 protons in its nucleus, how many neutrons does it have?
List five characteristic features of Vertebrates.
Health is not merely absence of diseases. How can we define health? Classify diseases on the basis of :
(i)
Duration of the diseases
(ii) Cause of the diseases. Give one example of each type.
(a) Write an expression for potential energy of an object with mass m placed at height h.
(b) Find the ratio of changed potential energy to the original potential energy if the mass of the object is halved.
(c) Find the ratio of changed potential energy to the original potential energy if the object is now placed at half
of its original height from the ground.
(a) Define density. Give its mathematical formula.
(b) The mass of an iron cube having an edge length 1.8cm is 70 g. Find its density.
(c) The volume of a 350 g sealed tin is 200 cubic cm. Find the density of the tin in g/cc. Also find the density in
SI unit.
18.
19.
20.
21.
SECTION : B (OTBA)
(*Please ensure that open text of the given theme is supplied with this question paper.)
Conservation of Water Bodies
[2 marks]
22.
Name any four inland water reservoirs.
23.
Name the important scheme for conservation of aquatic Ecosystem. What are the aims of this scheme?
[3 marks]
24.
What are the problems faced by people in solving the water issues and what suggestions are made to overcome
[5 marks]
them?
SECTION : C
I.
Question numbers 25 to 33 carry one mark each
25.
Generally sound waves travel in air at a speed of 340 m/s. This statement implies that :
26.
(a)
the source of sound moves with a speed of 340 m/s.
(b)
air does not move forward, but sound energy moves through it at a speed of 340 m/s.
(c)
the air moves with a speed of 340 m/s.
(d)
the observer moves with a speed of 340 m/s.
The relationship between pressure and area is :
(a)
It is directly proportional to square of area
(b)
It is directly proportional to area
(c)
It is inversely proportional to area
(d)
It is inversely proportional to square of area
Page 22
27.
28.
29.
The given figure shows the verification of laws of reflection of sound waves. In this figure ABD is known as :
(a) angle of reflection
(b) angle of incidence
(c) angle of refraction (d) none of the above
The plants with well differentiated reproductive tissues that ultimately produce seeds are called :
(a) Thallophyte
(b) Broyophyte
(c) Pteridophyte
(d) Phanerogams
Which of the following is the correct set up for observing the law of conservation of mass in a chemical reaction
before the solutions are mixed?
(a)
30.
31.
32.
33.
II.
34.
35.
36.
(b)
(c)
(d)
If ‘X’ g of Magnesium combines with ‘Y’ g of Oxygen and forms ‘Z’ g of Magnesium oxide, then to verify the law
of conservation of mass, the correct equation is :
(a)
(b)
(c) X  Y 
(d) Y  Z 
X  Z 
Y
X  Y 
Z
Z
X
Which of the following plants has reticulate venation?
(a) wheat
(b) mint
(c) grass
(d) maize
Identify the type of venation in the leaves A and B given below :
(a) B has reticulate venation and A has parallel venation
(b) A and B both have reticulate venation
(c) A and B both have parallel venation
(d) B has parallel venation and A has reticulate venation
Complete life cycle of mosquito occurs :
(a) into the water
(b) on the surface of water (c) on the land
(d) in the air
Question numbers 34 to 36 carry two marks each
When a body hanging with the hook of a spring balance is immersed in a liquid, state the factor due to which the
reading of spring balance decreases. Define the factor.
From the given table of densities of different substances, infer whether the given object would float or sink in the
given solution?
Material
Density g/cm3
Gasoline
0.7
Gold
19.3
Lead
11.3
Mercury
13.6
Paraffin (wax)
0.87
Platinum
21.4
Find :
(i)
Will a bar of gold sink in mercury?
(ii) Will a piece of platinum float on gasoline?
(iii) Will a block of paraffin sink in gasoline?
(iv) Will a piece of platinum sink in mercury?
Which fins help the fish in balancing and movement?
Page 23
ANSWERS KEY
PAPER – 1
1.
C
2.
9.
Rs.1116
15.
D
16.
25.
B
26.
A
3.
D
4.
2 gwt
0  6 gm / cm 3
5.
6.
10.
11.
12.
 2295 m
13.
B
17.
18.
19.
20.
21.
22.
C
27.
28.
29.
30.
31.
32.
33.
7.
7.
25 gm wt
19  5  103 kg / m3
14.
8.
19  5 gm / cc
153C or 123C
23.
24.
34.
35.
36.
8.
9.
10.
11.
16.
17.
18.
19.
23.
24.
25.
C
PAPER – 2
1.
2.
12.
R.D.  2  67 sink
20.
(c)  5
27.
A
35.
4.
3.
5.
220 m / s
13.
14.
6.
15.
6m
(a)100 w
(b)  2m / s (c) w  800J, P  80W
21.
28.
D 29. A 30. A 31. C
(a) equal , Archemedes (b) greater, greater
32.
B
33.
22.
B
26.
A
34.
C
PAPER – 3
1.
2.
3.
4.
5.
6.
7.
12.
w  600N
13.
14.
660m
15.
20.
21.
22.
23.
24.
25.
35.
36.
32.
B
33.
B
34.
125gm
8.
w  2 105 J
A 26. A
27.
B
9.
10.
11.
16.
17.
18.
28.
A
29.
D
30.
19.
C
31.
C
PAPER – 4
1.
2.
4.
3.
3.4 km
2
5
11.
12.
(i) 1333.33 N / m (ii) 10 pa
19.
20.
(c) 37.2 kwh
26.
B
25.
D
27.
B
28.
A
5.
0.1 J
6.
7.
8.
9.
10.
13.
990m
14.
15.
16.
17.
18.
22.
23.
24.
34.
35.
36.
21.
(b)14.81g / cc (c) 0.625 g / cc float
29.
D
30.
B
31.
B
32.
B
33.
C
PAPER – 5
1.
12.
2.
3.
4.
(a) R.D.  2.66  1  sink
(c) (ii)100gm
18.
19.
24.
25.
1.
2.
3.
11.
12.
13.
16.
17.
(a) 4.25
28.
B
27.
A
B
26.
29.
B
27.
C
4.
5.
6.
13.
14.
20.
21.
17.
16.
1.35 105 J
(a)12kwh (b) 24kwh (c) 21.6kwh
29.
A
28.
5.
A
14.
15.
18.
19.
20.
30.
A
31.
8.
32.
D
9.
10.
11.
(c) (i)1260gm
15.
30.
B
PAPER – 6
w  5.4 105 J
(b) 688 m
A
7.
31.
6.
B
32.
7.
33.
D
B
8.
22.
23.
34.
250gm
9.
10.
(a) SI unit  19500kg / m3 &19.5 g / cc (b)1.27gm
21.
22.
23.
24.
34.
35.
36.
7.
8.
9.
10.
(a) 3000m
17.
18.
19.
20.
22.
23.
24.
25.
34.
35.
36.
C
33.
B
25.
B
26.
A
PAPER – 7
1.
2.
23
12.
14.
13.
21.
(b)12.002g / cc
28.
D
29.
B
30.
3.
4.
(a)1.08 kwh
5.
16.
15.
(c) 1.75g / cc &1750 kg / m
B
31.
D
32.
B
3
33.
6.
B
26.
11.
C
27.
B
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