Cbse class 9 science sample paper term 2 model 2 - http://cbse.edurite.com/cbse-sample-papers/cbse-sample-papers-for-class-9-science.html

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Sample Question Paper
SCIENCE
Class – IX
Term – II
Time: 3 hrs. MM: 90
GENERAL INSTRUCTIONS:
i) The question paper comprises of two sections, A and B, 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) Questions numbers 1 to 3 in section A are one mark questions. These are to be
answered in one word or one sentence.
vi) Question numbers 4 to 7 are two marks, to be answered in about 30 words each.
vii) Question numbers 8 to 19 are three mark questions, to be answered in about 50
words each.
viii) Questions numbers 20 to 24 are five mark questions, to be answered in about 70
words each.
ix) Question numbers 25 to 42 in section B are multiple choice questions based on
practical skills. Each question is a one ark question. You are to choose one most
appropriate response out of the four provided to you.

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SECTION – A
1. Gram seeds are soaked in water and upon becoming tender; they split into two equal
halves. State the name of these two halves.
2. State one cause of the depletion of ozone layer.
3. Which animal tissue is commonly known as packaging tissue?
4. What is relative density?
If an object is immersed wholly in a liquid causing up-thrust equal to the weight of the body
then what will be the relation between the relative densities of liquid and the object?
5. State the wave property that determines ‘pitch’ of sound.
6. State in tabular form the method of transmission of each of the following diseases.
(a) Cholera
(b) HIV-AIDS
(c) Malaria
(d) Pneumonia
7. State the factors on which work done depends.
8. (a) Calculate the molar mass of S8.
(b) Convert into mole: i) 12 gram of oxygen gas
ii) 32 gram of oxygen molecule.
9. Explain the salient features of Phylum Mollusca.

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10. Composition of the nuclei of two atomic species A and B are given below:
A B
Protons 6 6
Neutrons 6 8
(i) State the mass numbers of A and B.
(ii) What is the charge on the atoms A and B?
(iii) State the relationship between the two species.
11. (a) Mention any two human activities which would be responsible for air pollution.
(b) How is Earth’s atmosphere different from that of Venus and Mars?
12. Write two properties each of a solution, suspension and a colloid with respect to stability
and filterability.
13. Why bryophytes are called the amphibians of the plant kingdom?
14. Define power. Derive SI unit. An electric bulb is rated 10W. What does it mean? What is the
energy consumed in joules if it is used for 5 minutes?
15. Suppose a man is trying to push a wall. But the wall doesn’t move. What is the amount of
work done? Calculate the amount of work done in lifting a body of mass 3 kg through a
distance of 11 meters.
16. What is symbiosis? Name a symbiotic life form. Mention the specific organisms which
display the symbiotic relationship in this life form.

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17. 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.
18. (a) What is audible range the average human ear?
(b) Explain how ultrasound is used to clean spiral tubes and electronic components.
19. State the meaning of 1 Pascal. A boy of mass 40 kg is standing on loose sand. If the area of
his feet is 0.04m2
calculate the pressure exerted by the boy on the sand. (g=10ms-2
)
20. Define the following terms and state their S.I. units:
(a) Wavelength
(b) Frequency
(c) Amplitude
Derive a relationship to show how the wavelength and frequency of a sound wave are
related to its speed.
OR
With the help of a simple diagram describe in brief how depth of seabed at a place is
determined by SONAR.
A SONAR device on a submarine sends out a signal and receives its echoes 3s later. If the speed
of sound waves in sea water is 1530 ms-1
find the depth of the seabed below the submarine.
21. (a) State the Law of conservation of mass and Law of definite proportion with the help of
one example each.
(b) What are polyatomic ions? Give two examples.

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OR
(a) State any two differences between an atom and molecule.
(b) How 22
Z10 and 20
Z10 related to each other and why? If abundance of 22
Z10 and 20
Z10 is 90%
and 10% respectively then calculate the average atomic mass of Z?
22. With the help of a labelled diagram, show
(a) Nitrogen cycle in nature
(b) Describe briefly any two processes involved in the cycling of N2 in the environment.
OR
With the help of a labelled diagram show the cycling of carbon in nature. What are the two
ways in which carbon-di-oxide is fixed in the environment?
23. Give reason for the following
(a) Isotopes of an element are chemically similar
(b) An atom is electrically neutral
(c) Noble gases show least reactivity
(d) Nucleus of an atom is heavy and positively charged.
(e) Ions are more stable than atoms.
24. A person enters a museum and observes the animal specimens. He looks at the one marked
“Salamander” and calls it a “Lizard”. How will you explain to him that Salamanders and
Lizards belong to two different classes? List four distinguishing features and also give one
example each of the other members of the above two classes.

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OR
Distinguish between gymnosperms and angiosperms in respect to the following characters:
(a) Nature of seeds
(b) Reproductive organs
(c) Xylem
(d) Phloem
(e) Ovules
SECTION - B
25. In Agaricus, the umbrella shaped above ground part that we observe is
(a) Button stage
(b) Fruiting body
(c) Gills
(d) Mycelium

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26. The time period of a sound wave travelling in a medium is T. At a given instance (t=0) a
particular region in the medium has minimum density. The density of this region will be
minimum again at
(a) t=T
(b) t=T/2
(c) t=T/3
(d) t=T/4
27. A student noted down the following precautions for the experiment “To verify the law of
conservation of mass in a chemical reaction.”
(i) The spring balance should be held vertical while in use.
(ii) Before making use of the spring balance it must be ensured that its pointer is at zero
mark.
(iii) The reading of the balance should be noted only when its pointer cones to rest.
(iv) Mixing of two solutions is done quickly.
(v) Chemical reaction should be exothermic.
The precautions which need modifications are
(a) I and II
(b) II and III
(c) III and IV
(d) IV and V

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28. The forelimbs of birds are modified as
(a) Legs
(b) Scales
(c) Wings
(d) Clawed toes
29. In the experiment determining the velocity of propagation of a pulse in a slinky/string, we
prefer a long slinky/string –
(a) Because pulse cannot be formed in a short slinky/string
(b) Because short slinky/string is cheap
(c) So that pulse may move through it easily.
(d) So that time taken by pulse to move from one end of slinky/string to other is more.
30. While studying the reflection of sound, 3 students used different reflecting surfaces. The
best result would be obtained by the student using the reflecting surface –
(a) A thermocol sheet
(b) A polished, plane metal sheet
(c) A rough cardboard sheet
(d) A cushioned chair
31. While determining the density of a copper piece using a spring balance and a measuring
cylinder, Rama carried out the following procedure:
(i) Noted the water level in the measuring cylinder without the copper piece.
(ii) Immersed the copper piece in water.
(iii) Noted the water level in the measuring cylinder with the copper piece inside it.

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(iv) Removed the copper piece from the water and immediately weighed it using a
spring balance
The wrong step in the procedure is:
(a) Step ‘1’
(b) Step ‘2’
(c) Step ‘3’
(d) Step ‘4’
32. Choose the option which includes the feature that helps the fish to change its direction.
(a) Caudal fin and pelvic fin
(b) Dorsal fin and anal fin
(c) Dorsal fin only
(d) Caudal fin only.
33. Which of the following characteristics does not belong to following plants?
(a) Seeds are naked
(b) Conducting tissue is well developed
(c) Shows nodes and internodes
(d) Shows the presence of root hairs.
34. Which of the following is not an aerial adaptation of a bird?
(a) Presence of strong flight muscles.
(b) Presence of vertebral column.
(c) Streamlined body
(d) Forelimbs modified into wings.

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35. Two bodies of unequal masses are dropped from the table. At any instant, they have equal:
(a) Momentum
(b) Acceleration
(c) Potential energy
(d) Kinetic energy
36. Which one of the following is the correct statement with reference to cockroach?
(a) Exoskeleton is soft
(b) Exoskeleton is chitinous
(c) Endoskeleton is soft
(d) Endoskeleton is chitinous
37. The sequence of developmental stages during the life cycle of a mosquito may be
represented as –
(a) Egg, pupa, larva, adult
(b) Egg, larva, pupa, adult
(c) Larva, egg, pupa, adult
(d) Larva, pupa, egg, adult
38. Four students A, B C and D observed roots and leaves of gram and reported as under –
(a) Fibrous root and reticulate venation
(b) Fibrous root and parallel venation
(c) Tap root and reticulate venation
(d) Tap root and parallel venation

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39. A boy brought a free floating, bright green, silky mass from the surface of a fresh water
pond. He observed it under a microscope. Identify the specimen
(a) Nostoc
(b) Spirogyra
(c) Sargarsum
(d) Sphagnum
40. Which of the following is a characteristic feature of ferns?
(a) They have male and female cones
(b) They have rhizoids
(c) They have needle shaped leaves
(d) Their plant body is differentiated into root, stem and leaves.
41. Pick the odd one out.
(a) Wings
(b) Compound eyes
(c) Jointed legs
(d) Scales
42. Wave produced along a compressed spring are:
(a) Longitudinal wave
(b) Transverse wave
(c) Seismic wave
(d) Electromagnetic wave