Sample Paper Science - I

8/3/2019 Sample Paper Science - I

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Paper: CBSE Sample paper 5 (Silver series) - IX - Science -SA II

Total marks of thepaper:

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 fivemarks 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 orone 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. Eachquestion is a one mark question. You are to choose one most appropriate response out of the four providedto you.

Questions:

1] Is potential energy a vector or a scalar quantity? [Marks:1]

2] State the law of constant proportions? [Marks:1]

3] Write any two methods of preventing soil erosion. [Marks:1]

4] (i) Give any two examples of longitudinal waves.(ii) What is the most essential property of a wave motion and why?

[Marks:2]

5] (a) Which phylum of kingdom animalia has spiny body? Give one example of it.(b) Write the name of the class to which the following belongs:(i) Sea horse.(ii) King cobra.

[Marks:2]

6] (a) Write two points of difference between amphibians and reptiles.(b) List two characters which help amphibians to survive on land.

[Marks:2]

7] (a) Name any two abiotic factors that make soil.(b) What would happen if all the oxygen present in the environment is converted to ozone?

[Marks:2]


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8] (a) Calculate the work done in lifting 200 kg of water through a vertical height 6 meter.(Assuming g = 10m/s2)(b) When an object moves on a circular path, what is the work done?

[Marks:3]

9] (a) Define frequency and wavelength in reference to sound.(b) What is echo? Give formula for time of echo.

[Marks:3]

10] (a) Establish a relation between wavelength, frequency and speed of sound in a medium.(b) Give two examples of transverse waves.

[Marks:3]

11] Which would have greater effect on the kinetic energy of an object, doubling the mass ordoubling the velocity?

[Marks:3]

12] What is the loudness of sound? On what factors do it depends? [Marks:3]

13] (i) Which postulate of Dalton's atomic theory is the result of the law of conservation of mass?(ii) Name the term used for the symbolic representation of a molecule of an element or acompound? Give an example of it.

[Marks:3]

14] (a) What is the mass of?(i) 0.2 mole of oxygen atoms?(ii) 0.5 mole of water molecules?(b) Name the two types of radicals.

[Marks:3]

15] (i) On the basis of Thomson's model of an atom, explain how the atom is neutral as a whole?(ii) Where are electrons found in the atom?(iii) What is the atomic number of an atom with 7 proton, 8 neutrons and 7 electrons?

[Marks:3]

16] (a) What are lichens? Give two examples and one use of it?(b) Name the excretory organs of following:(i) Cockroach(ii) Leech

[Marks:3]

17] (a) What are the two ways to treat an infectious disease?(b) Name any two sexually transmitted diseases.

[Marks:3]

18] (a) How air borne transmitted diseases like common cold spreads?(b) What do we call such microorganisms that cause diseases? Give one example also.

[Marks:3]

19] (a) Why antibiotics do not work against viruses?(b) (i) Name any two diseases which have long term effect on the health of an individual.(ii) What is immunity?

[Marks:3]


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20] (a) Calculate the power of an engine which can lift 200 Kg of water to store in a tank at a heightof 10 m in 4.9 s. Also express in horse power. (given = 9.8 m/s2.(b) What type of energy is stored in the spring of a watch?(c) What is the work done by the tension in the string of a sample pendulum?Or

(a) What happens to the kinetic energy when:(i) The mass of the body is doubled at constant velocity?(ii) The velocity of the body is doubled at constant mass?(iii) The mass of the body is doubled but the velocity is reduced to half?(b) Two bodies of equal masses move with the uniform velocities v and 3v respectively. Find theratio of their kinetic energies.

[Marks:5]

21] (a) State Archimedes' principle. Mention a few applications of Archimedes' principle.(b) Why railway tracks are laid on large sized wooden sleepers?Or(a) Give relation between velocity, wavelength and frequency.(b) A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02s. If thespeed of sound in salt water is 1531 m/s, how far away is the cliff?

[Marks:5]

22]

[Marks:5]

23]

[Marks:5]


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24]

[Marks:

5]

25] Waves propagate well in [Marks:1]

A. Unloaded slinky

B. Equally in (a) and (b)

C. None of these

D. Loaded slinky

26] What type of surface is needed for the reflection of sound waves? [Marks:1]

A. Smooth surface only.

B. Polished and smooth surface.

C. Polished and rough surface.

D. Hard surface only.

27] SI unit of pressure is [Marks:1]

A. Newton

B. Newton m2

C. Pascal m2

D. Newton/m2

28] The measuring range of a measuring cylinder is 25 ml. If its least count is ml, then the spacebetween 5 ml and 10 ml mark should be divided into

[Marks:1]

A. 25 equal parts

B. 5 equal parts

C. 2 equal partsD. 10 equal parts

29] The sea water is denser than fresh water due to [Marks:1]

A. Evaporation

B. Mixing of sand

C. Stagnation


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D. Mixing of salts

30] Apparent loss in weight is caused due to [Marks:1]

A. Decrease in mass.

B. Decrease in volume.C. Decrease in density.

D.Upward thrust exerted by the

liquid.

31] A nail sinks in the sea water but a much heavier ship floats on it because [Marks:1]

A. Density of sea water is very high.

B. Ship is not too heavy.

C.

The uplift acting on ship is very

small compared to the weight of

the ship.

D.

The weight of the water displaced

by the ship is more than that of theship.

32] A body is weighed using a spring balance. It will show the weight of the body at your place to be [Marks:1]

A. Equal to that at the poles.

B. Less than that at the equator.

C. More than that at the poles.

D. More than at the equator.

33] What is the colour of the precipitate that gets formed in the experiment carried out for theverification of the law of conservation of mass?

[Marks:1]

A. Green

B. Blue

C. Yellow

D. White

34] What is the correct statement of the 'Law of Conservation of Mass'? [Marks:1]

A.

The elements are always present in

a constant proportion in a chemicalsubstance.

B. If two elements form more than

one compound between them, then

the ratios of the masses of thesecond element which combine

with a fixed mass of the first

element will be ratios of small


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whole numbers.

C.

The rate of reaciton is directly

proportional to the active mass ofthe reactants.

D.That mass can neither be created

nor be destroyed.

35]

[Marks:1]

A. Ulothrix

B. Chlamydomonas

C. Cladophora

D. Spirogyra

36] Which of the following is the characteristic feature of ferns? [Marks:

1]

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.

37] Choose the option which includes the feature that helps the fish to change its direction. [Marks:1]

A. Caudal fin and pelvic fin

B. Dorsal fin and anal fin

C. Dorsal fin only

D. Caudal fin only

38] Pick the odd one out: [Marks:1]

A. Jointed legs

B. Compound eyes


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C. Wings

D. Scales

39] Which of the following is not an aerial adaptation of bird? [Marks:1]

A. Presence of strong flight muscles.B. Streamlined body.

C. Forelimbs modified into wings.

D. Presence of vertebral column.

40] Choose the option that best describes the feature of spirogyra. [Marks:1]

A.Multicellular, autotrophic, root

like rhizoids

B.Cytoplasmic strands, autotrophic,

presence of rhizome

C. Presence of male cones,nonvascular filaments

D.Filamentous, Presence ofcytoplasmic strands, presence of

pyrenoids

41] Identify the group of plants in which vascular tissues are present, but no seeds, [Marks:1]

A. Bryophyta

B. Gymnosperm

C. Angiosperm

D. Pteridophyta

42]

[Marks:1]

A. Pointed head

B. Bulky thorax

C. Presence of scales

D. post anal tail


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SOLUTION

Paper: CBSE Sample paper 5 (Silver series) - IX - Science -SA II

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 fivemarks 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 orone 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. Eachquestion is a one mark question. You are to choose one most appropriate response out of the four providedto you.

Solutions:

1] Potential energy is a scalar quantity.


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2] Law of constant proportions: In a chemical substance, the elements are always present in definiteproportions by mass.

3] (a) Grazing of animals should be prevented.(b) Prevention of deforestation and increase of forestation.

4] (i) Waves produced in air.(ii) When a freely suspended spring is pulled downwards and released, longitudinal waves areproduced.(b) The most essential property of a wave motion is its frequency. Frequency of a wave is its inherentcharacteristic and does not change by the change in temperature, pressure or change in medium.

5] (a) The animals of phylum Echinodermata have spiny skinned body.Example - Asterias (star fish), Holothuria (Sea cucumber)(Any one)(b) (i) Sea horse - Pisces.(ii) King cobra - Reptilia.

6]

7] (a) (i) Sun(ii) Water(iii) Wind(Any two)(b) If all the oxygen present in the environment is converted to ozone then it would be difficult to breatheand survive and all the living forms would be killed.

8]


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9]

10]

11] (i) As kinetic energy of an object is directly proportional to its mass, so if mass is doubled (i.e. itbecomes 2 m), then kinetic energy will also get doubled.(ii) On the other hand, the kinetic energy of an object is directly proportional to the "square of its velocity"(v2).So, if the velocity is doubled (i.e. it becomes 2 v), then kinetic energy will become four times. This isbecause (2v)2 = 4v2.Hence, it is clear that doubling the velocity has a greater effect on the kinetic energy of an object.

12] The sensation of hearing, which enables us to distinguish between a loud and a soft sound is calledloudness.The factors on which sound depends are:

(i) Amplitude of vibration of the source producing the sound waves.(ii) Amplitude depends upon the force with which an object is made to vibrate.(iii) Loudness is also related to the intensity of sound.

13] (i) "Atoms are indivisible particles which can neither be created nor destroyed in a chemical reaction".(ii) Chemical formula.Example - Chemical formula of sodium carbonate is Na2CO3.


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14]

15] (i) According to Thomson's model, an atom is made up of positively charged sphere in which electronsare embedded. The negative and positive charges are equal in magnitude. An atom has the samenumber of electrons and protons. This explains that the atom is neutral as a whole.(ii) Electrons revolve around the nucleus in certain fixed paths which are called orbits or shells havingdefinite energy.(iii) Atomic number = Number of protons = 7.

16] (a) Lichens are a symbiotic combination between algae and fungi where both are mutually benefited.

It is used as pollution indicators.(b) (i) Cockroach - Malphigian tubules(ii) Leech - Nephridia

17] (a) The two ways to treat an infectious disease are:(i) To reduce the effects of the disease.(ii) To kill the cause of the disease.(b) Syphilis and AIDS.

18] (a) Air borne diseases occur through the little droplets thrown out by an infected person who sneezes orcoughs.Someone standing closely can breathe in these droplets, and the microbes get a chance to start a newinfection.(b) Pathogens

Example - bacteria, fungi, virus, protozoan(Any one)

19] (a) Viruses have different cell pathways as compared to bacteria. Thus, they cannot be killed byantibiotics.Viruses have few biochemical mechanisms of their own. They enter the host cell and use theirmachinery for their life processes.If we have to reduce the severity of the disease then we have to work against our body or the host cell.(b) (i) Diabetes and AIDS.(ii) The built in resistance of body for a disease is called immunity.


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20]


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21]


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22]


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23]


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24]

25] Loaded slinky

26] Hard surface only.

27] Newton/m2

28] 10 equal parts

29] Mixing of salts

30] Upward thrust exerted by the liquid.

31] The weight of the water displaced by the ship is more than that of the ship.

32] More than at the equator.

33] White

34] That mass can neither be created nor be destroyed.

35] Spirogyra

36] Their plant body is differentiated into root, stem and leaves.


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37] Caudal fin only

38] Scales

39] Presence of vertebral column.

40] Filamentous, Presence of cytoplasmic strands, presence of pyrenoids

41] Pteridophyta

42] post anal tail

Sample Paper Science - I

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