Paper:
IX Science SA II Sample Paper 1
Total marks of the paper:
90
Total time of the paper:
3 Hrs
Test instructions:General Instructions:
i) The question paper comprises of two sections, A (Question No. 1 to 24)and B (Question No. 25 to 42), you are
to attempt both the sections.
ii) All questions are compulsory.
iii) There is no overall choice. However, internal choice has been provided in all the five questions of five marks
category. Only one option in such questions is to be attempted.
iv) All questions of section A and all questions of section B are to be attempted separately.
v) Question numbers1 to 3 in section A are one mark question. These are to be answered in one word or one
sentence.
vi) Questions numbers 4 to 7 are two marks questions, to be answered in about 30 words.
vii) Question numbers 8 to 19 are three marks questions, to be answered in about 50 words.
viii) Question numbers 20 to 24 are five marks questions, to be answered in about 70 marks.
ix) Question numbers 25 to 42 in section B are multiple choice questions are based on practical skills. Each
question is a one mark question. You are to choose one most appropriate response out of the four provided to
you.
Questions:
1]
Give one example where kinetic energy is transferred from one object to other.
[Marks:1]
2]
What are polyatomic ions?
[Marks:1]
3]
What are the different states in which water is found during the water cycle?
[Marks:1]
4]
Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the
flash is seen, why? How does the speed of sound in air vary with rise in density of the
medium?
[Marks:2]
5]
(a) Name any two green house gases.
(b) What causes global warming?
[Marks:2]
6]
Give two examples where oxygen is not playing any role in supporting life.
[Marks:2]
7]
Write two points of difference between gymnosperms and angiosperms.
[Marks:2]
8]
(a) Draw a diagram depicting low pitched sound and high pitched sound.
(b) When a person uses deodorant spray, the other person standing at a distance would hear
the sound of spraying first and the fragrance of spray would reach him later. Why so?
[Marks:3]
(a) An object 'P' of mass m is lifted from a point A on ground to point B at a height 'h' above the
earth by Rina and Mita, but the path taken for doing it is different by both (as shown in fig. I
[Marks:3]
and II) Calculate the work done in both the situations.
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9]
(b) In the above given cases, which force is doing positive work and which one is doing
negative work?
10] What is SONAR? For what it is used? Explain in brief its working.
[Marks:3]
11] Define work. What are the conditions on a force for doing work on an object?
[Marks:3]
12] State three conditions necessary for hearing sound.
[Marks:3]
13] Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper
hydroxide and sodium sulphate. In an experiment, 15.95 g of
copper sulphate reacted with 8.0 g of sodium hydroxide to form 9.75 g of copper [Marks:3]
hydroxide and 14.2 g of sodium sulphate. Which law of chemical combination is
illustrated by this data? Give reason for your choice.
14] Calculate the number of molecules of sulphur present in 16 g of solid sulphur.
[Marks:3]
15] (a) If an element M has mass number 27 and atomic number 13, how many protons and
neutrons does its atom contain? What valency will be shown by M?
(b) Write the electronic configuration of an atom with atomic number 6.
[Marks:3]
16] Give two examples of each of the following:
(a) Diseases which spread through air.
(b) Diseases which spread through water.
(c) Diseases which spread through insect.
[Marks:3]
17] What precautions can you take in your school to reduce the incidence of infectious diseases?
Mention any three points.
[Marks:3]
18] (a) List any two benefits of classification.
(b) Why bryophytes and pteridophytes grow in moist and shady places?
[Marks:3]
19] Two HIV - infected siblings Anu and Nikhil were expelled from their school. Only after the
intervention of a NGO, they were deadmitted.
(ii) Write any three modes of transmission of this disease.
(iii) What is your viewpoint about both the steps taken by the school as well as the NGO?
[Marks:3]
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(i) Which disease are the two children suffering from?
20]
[Marks:5]
21]
[Marks:5]
22]
[Marks:5]
23] (a) Describe oxygen cycle with the help of a diagram.
(b) How depletion of ozone layer takes place?
Or
24] (a) Define the following terms:
(i) Lichens
(ii) Cryptogamae
(iii) Phanerogams
(b) Why whales are not grouped in the fishes?
(c) What is bilateral symmetry?
Or
(a) Give reasons for the following:
(i) Bryophytes are called amphibians of plant kingdom.
(ii) From Phylum Platyhelminthes onwards, animals are categorized as 'triploblastic'.
(iii) The presence of 'coelom' in an animal's body is considered as advantageous.
(b) What are oviparous animals?
[Marks:5]
[Marks:5]
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(a) Define the following terms:
(i) Ammonification
(ii) Nitrification
(iii) Denitrification
(b) State any two applications of green house effect.
(c) Name the phylum in which pharyngeal gill slits are present.
25] Reverberation produced in large auditoriums is due to:
A.
B.
C.
D.
[Marks:1]
Reflection of sound by windows
Absorption of sound by walls
Reflection of sound by walls and ceiling
Absorption of sound by floor
26] The least count of a spring balance is 1 g wt. When it is suspended freely without any weight
attached to the hook, the pointer is just in front of second small division on the scale. The zero [Marks:1]
error is
-2 g wt
+2 g wt
Zero
+1 g wt
27] A student noted down the following observations in his note book:
(i) Weight of the stone in air = 272 g wt
(ii) Weight of the stone in water = 192 g wt
(iii) Weight of the stone in salty water = 176 g wt
The relative density of the salty water must be
A.
B.
C.
D.
11/12
11/17
13/17
6/5
28] A student lowers a body in a liquid filled in a container. He finds that there is a maximum
apparent loss in weight of the body when
A.
B.
C.
D.
[Marks:1]
axis of tube
normal to the axis of the tube
an angle of 30o from the axis of the tube
an angle of 45o from the axis of the tube
31] A student while verifying laws of reflection of sound measured the angle between the incident
sound wave and reflected sound wave as 110 o. The angle of reflection is
A.
[Marks:1]
P = F/A
P = A/F
P = FA
P = F/A2
30] In the experiment of verification of reflection of sound, the incident sound is directed along
A.
B.
C.
D.
[Marks:1]
It just touches the surface of the liquid.
It is completely immersed in the liquid.
It is partially immersed in the liquid.
It is partially immersed and also touches the
sides of the container.
29] An object exerts a force F on a surface of surface area A. The pressure P acting on the
surface is given by
A.
B.
C.
D.
[Marks:1]
110
[Marks:1]
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A.
B.
C.
D.
B.
C.
D.
55
27
35
32] In a slinky one can produce (i)only crest
(ii) only trough
(iii) crest and trough
(iv) compression and rarefaction.
The correct answer will be A.
B.
C.
D.
i, ii
i, iv
ii. iv
iii, iv
33] Who stated the Law of conservation of mass?
A.
B.
C.
D.
[Marks:1]
Dalton
Lavoisier
Cavendish
Thomson
34] According to Law of conservation of mass, mass of reactants wil be equal to the mass of:
A.
B.
C.
D.
[Marks:1]
[Marks:1]
Products
Catalysts
Gases evolved
Apparatus used for reaction
35] The given animal belongs to Phylum ______.
[Marks:1]
A.
B.
C.
D.
Annelida
Arthropoda
Mollusca
Echinodermata
36]
A.
B.
C.
Pointed head
Bulky thorax
Presence of scales
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[Marks:1]
D.
Post anal tail
37]
[Marks:1]
A.
B.
C.
D.
Cells of the body.
Cell walls separating the cells of the body.
Vertically arranged muscles of the body.
Septa separating segments of the body.
38]
[Marks:1]
Bryophyte
Pteridophyte
Gymnosperm
Angiosperm
39] Rajiv found out the role of spiracle in a cockroach as:
A.
B.
C.
D.
[Marks:1]
Excretion
Circulation
Respiration
Movement
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A.
B.
C.
D.
40]
[Marks:1]
A.
B.
C.
D.
A
B
C
D
41] A specimen of a fish was given to students to identify the externally visible chordate feature in
[Marks:1]
it. The student would look for:
Operculum
Notochord
Dorsal tubular nerve cord
Post anal tail
42] The sub division of Spirogyra is:
A.
B.
C.
D.
[Marks:1]
Algae
Fungi
Bryophyta
Pteridophyta
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A.
B.
C.
D.
Solutions:
1]
In the game of billiards, the player provides the kinetic energy to the cue ball by striking it with the cue stick. If the cue ball
collides with another ball, it will slow down dramatically and the ball it collided with will gain speed as the kinetic energy is
transferred on to it.
2]
A group of atoms carrying a positive or a negative charge are called polyatomic ions.
3]
The different states in which water is found during the water cycle are liquid (water), gas (water vapour) and solid (snow).
4]
In lightning process, flash and thunder are produced simultaneously. Flash is seen almost immediately because speed of light
is extraordinarily large. But thunder is heard a few seconds later because speed of sound << speed of light.
Speed of light increases with the increase in density of the medium.
5]
(a) Carbon dioxide (CO2), methane (CH4), ozone (O3) and water vapour (H2O) are green house gases. (any two)
(b) The greenhouse gases do not allow heat rays to escape from the earth resulting in an increase of temperature of the
earth. Hence, green house gases cause global warming.
6]
(a) Some bacteria are poisoned by elemental oxygen.
(b) The process of nitrogen fixation by bacteria does not take place in the presence of oxygen.
7]
Difference between Gymnosperms and Angiosperms :
Gymnosperms
Angiosperms
(i) The seeds are naked.
(i) The seeds are enclosed by fruit wall.
(ii) The microspores and megaspores are (ii) The microspores are produced in
produced by male and female cones.
anthers while the megaspores are
produced in ovules of the ovary in
flowers.
9]
(a) Work done = F x s
= ma x s
=mxgxh
= mgh (Potential Energy)
In both the situations, W = mgh, since it is independent of path followed and depends only on initial
and final positions.
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8]
(b) Muscular force is doing positive work as it is in the direction of motion.
Gravitational force is doing negative work as it is in the opposite to the direction of motion.
10]
SONAR stands for Sound Navigation and Ranging.
It is a device used to measure the distance, direction and speed of objects lying under water using
ultrasonic waves.
It comprises of a transmitter and a receiver. Ultrasound waves produced by the transmitter travel
through water and get reflected by an object, and then are picked up by the receiver.
If t = time interval between transmission and reception of reflected ultrasound wave
v = speed of sound through water
d = distance of the object that reflected the ultrasound, then
distance = speed x time
2d = vt
11]
Work done by a force on an object is equal to the product of the magnitude of force exerted on the object and the distance
travelled by the object in the direction of the force. The conditions for doing work are:
(i) A force should act on an object, and
(ii) The object must be displaced
If any of the above two conditions is not satisfied, work is not done.
12]
Three conditions for hearing a sound are:
(i) There must be a vibrating object, capable of transferring its energy to its surroundings.
(ii) There must be a material medium to pick up energy and then propagate it in the forward direction.
(iii) There must be a receiver, so as to receive the sound vibrations and transmit them to the brain for final interpretation, such
as human ear.
13]
According to questionClearly, in this case
total mass of reactants = (15.95 gm + 8 gm) = 23.95 gm
total mass of products = (9.75 gm + 14.2 gm) = 23.95 gm
Hence, Law of conservation of mass is valid here.
14]
16]
(a) Common cold and tuberculosis.
(b) Jaundice and typhoid.
(c) Malaria and dengue fever.
17]
(a) Prevent water logging to avoid mosquito breeding.
(b) Provision of safe drinking water.
(c) Periodic cleaning of toilets.
18]
(a) (i) It makes study of organisms easy.
(ii) It gives inter-relationship amongst different groups of animal.
(iii) It gives us an idea about existing life forms.
(iv) Classification is the base for development of other branches of biological science.
(Any two)
(b) Bryophytes and pteridophytes grow in moist and shady places because they require water for fertilization.
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15]
(i) AIDS.
(ii) Blood transfusion, infected syringe, carrier mother to her foetus.
(iii) School was wrong, NGO was right.
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19]
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20]
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21]
22]
(a) Oxygen-cycle: Oxygen from the atmosphere is used up in combustion, respiration and in the formation of oxides of
nitrogen.
It is returned to the atmosphere through photosynthesis.
(b) Chlorofluorocarbons used as solvents, refrigerants, propellants and blowing agents for plastic foams are stable and persist
in atmosphere for years. These enter the upper layers of atmosphere where UV radiation causes CFCs to dissociate the
ozone into oxygen.
OR
(a) (i) Ammonification is defined as the conversion of organic material of plants and animals into ammonia and amino acids by
microorganisms.
(ii) Nitrification is defined as the conversion of ammonia into nitrates by microorganisms.
(iii) Denitrification is defined as the conversion of nitrate into ammonia and free nitrogen by microorganisms.
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23]
(b) Applications of green house effect:
(i) In cold climatic conditions, vegetable and plants are grown in glass house to protect them from cold.
(ii) It is useful in increasing temperature in black box of solar cookers by covering it with plain glass sheet.
24]
(a) (i) Lichens: Some fungal species live in permanent mutually dependent relationships with blue-green algae. Such
relationships are called symbiotic and the symbiotic life forms are called lichens.
(ii) Cryptogamae: The reproductive organs of the thallophytes, the bryophytes and the pteridophytes are very inconspicuous
and are therefore, called ‘cryptogamae’. It means the plants with ‘hidden reproductive organs'.
(iii) Phanerogams: The plants with well differentiated reproductive tissues that ultimately make seeds are called
phanerogams’.
(b) Whales can swim in water like the fishes but are not fish as they respire with lungs and have four chambered heart and
mammary glands, so they are mammals.
(c) When the body of an organism can be cut into two equal halves which are the mirror image of each other, only by one
plane then the organism is said to have bilateral symmetry.
Or
(a) (i) Just like amphibians, bryophytes require water for fertilization as their gametes require aqueous medium for
movement.
(ii) There are three layers of germ cells from which differentiated tissues can be made. This allows inside and outside body
lining as well as some organs to be made. Thus, there is some degree of tissue formation and such organisms are called
triploblastic.
(iii) Coelom is a true internal body cavity in which well-developed organs can be accommodated.
(b) The animals which lay eggs are know as oviparous animals.
(c) Chordata.
25]
Reflection of sound by walls and ceiling causes reverberation in an auditorium.
26]
The zero error is = Least count x No. of divisions = 1 g wt x (+2) = +2 g wt.
27]
28]
When a solid is completely immersed in the liquid, there is maximum apparent loss in its weight due to maximum volume of
liquid displaced.
29]
Pressure is force per unit area. Thus, P = F/A
30]
The incident sound is directed along the axis of the tube to avoid loss.
31]
32]
33]
Lavoisier stated the law of conservation of mass.
34]
According to Law of conservation of mass, mass of reactants wil be equal to the mass of products.
35]
Arthropoda
36]
Post anal tail places both of them in the same phylum.
37]
The horizontal lines on the body of earthworm shows septa separating the segments of the body.
38]
Angiosperm
39]
Respiration
40]
D
41]
Post anal tail
42]
Algae
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For longitudinal vibrations, compressions and rarefactions are produced. For transverse vibrations,
crests and troughs are produced.
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