Class & section: VIII__ FIRST TERMINAL EXAMINATION SEPTEMBER -2011 Time: 3 hours
Roll No:______Marks Obtained:
Name of the Student______Total Marks: 100
Signature of the invigilator:______Science Signature of the evaluator:_____
Physics:
I. Choose the correct answer and fill in the blanks:1x5=5
1. Mariner’s compass works on _____ property of magnets.
a) attractive property b) directive property c) law of magnetic poles d) none of these
2. The formula used to calculate electric power is _____ a) P=Et b) P c) P= d) P=E2t
3. If the length of the pendulum is increased four times, its time period will be _____.
a) double b) four times c) eight times d) one fourth
4. The distance traveled by the car in first 5 seconds as per the given V – t graph is ____
a) 100 m b) 4 m c) 20 m d) 0 m
5. The displacement of an object X from A to G is ______
a) 0 m b) 12 m c) 6 m d) none of these
II. Complete the analogy: 1. Electromagnet : oersted : : Theory of relativity : ______1x3=3
2. Speed : meter per second : : Wavelength : _____ 3. Iron box ; nichrome : : Bulb : ______
III. Name the following:1x5=5
1. The region around a magnet in which magnetic force is present.
2. The gas filled in the electric bulb to give it a long life.
3. The actual path covered by a body in unit time.
4. The maximum displacement of the oscillating body from its rest position
5. The disturbance that occurs in a medium.
IV. Give scientific reasons:1x3=3
1. Electricity is the most convenient form of energy.
2. When a stone is thrown upwards it comes back to earth.
3. A piece of leaf does not move through the water waves.
V. Answer the following: 2x3=6
1. Differentiate transverse and longitudinal waves with an example each. .
2. A crane lifts a mass of 500 kg through a height of 20 mts. Calculate the work done by the crane.
3. Define electrolysis. How is it useful
VI. Answer the following: (about half a page)3x3=9
1. Explain the law of magnetic poles with an experiment.
2. Prove the second law of simple pendulum with an Experiment.
3. Name the different effect of electric current. Explain each of them with their use. (one use)
VII. Solve:1x4=4
1. A racing car starts from rest and attains a velocity of 10 m/s in 8 seconds. Find its acceleration & also find the
Distance traveled by it.
Chemistry:
I. Choose the correct answer & fill in the blanks:½ x5=2 ½
1. Anions are formed by ______electrons. ( losing, gaining, sharing, transferring)
2. The molecular mass of a water molecule is ______( 35.5, 36.5, 11, 18 )
3. Avagadro number is equal to ______( 6.023x1023, 60.23x1023, 60.23x2310, 602.3x1023 )
4. Atomic symbol of Sodium is _____ (K, S, Na, So )
5. Percentage of Magnesium present in Magnesium chloride is _____ (74.74, 25.26, 95, 39.18 ) Mg=24 Cl=35.5
II. Fill in the blanks:½ x5=2 ½
1. Complete the equation: a) NH4OH + HCl _____ + H2O b) CaCO3 heat ______+CO2
2. Protons are the ______charged particles in an atom. 3. Electrons are discovered by ______
4. The maximum number of electrons that can be accommodated in any shell is ______
III. Answer in a sentence:1x5=5
1. What are triatomic molecules? Give examples.
2. Atomic mass of oxygen is 16. What do you mean by this?
3. Define : i) molecule formula ii) chemical equation
4. Name two elements which have octet arrangement.
IV. Answer as directed:2x4=8
1. Distinguish between neutrons & electrons.
2. Write the principle that helps in arranging electrons in an atom.
3. Write the electronic configuration of Fe – 26 & K – 19.
4. What is the symbol of an element indicate?
V. Answer briefly:3x3=9
1. Calculate the percentage of each element present in Potassium hydroxide. K=39 O=16 H=1.
2. What does an electronic configuration indicate? (write any 4 points)
3. Complete the properties of element & compound.
V. i) Draw & explain the structure of atom. -2-
ii) The atomic number of chlorine is 17 & number of neutrons Present in its atom is 18. Calculate the atomic mass
of chlorine. -2-
.
Biology:
I. Choose the correct answer:1x5=5
1. Robert Koch is known for ______(vaccination, inoculation, postulates for studying bacteria, cell theory)
2. The study of cells is called as ______(cytology, histology, biology, genetics )
3. A plant virus is ______(HIV, TMV, plasmodium, HBV )
4. The protein factories of the cell is ______( mitocondria, ribosomes, RNA, golgi complex)
5. Athletes foot is caused by ______(algae, fungi, protozoa, virus )
II. Match the following:1x4=4
AB
algaeparasite
an ergastic substancefungi
pencillinchlymadomonas
A heterotrophstarch granules
III. Answer the following:1x4=4
1. What are prokaryotic cells?
2. How are virus different from other microbes.
3. Why is Bionomial nomenclature necessary?
4. How is energy produced in mitocondria?
IV. Answer the following:2x6=12
1. Explain briefly the two great achievements of Louis Pasture?
2. Mention any two uses of algae.
3. Draw a neat diagram of an animal cell and label any two parts of it.
4. Define diffusion. Illustrate with one one example to show the process of diffusion.
5. Give reasons for the following: i) Soil microbe – rhizobium help leguminous plants.
ii) Leather goods have fibres over it during monsoon.
6. Name the following: a) Primary biochemical building blocks in cells & tissues.
b) A nutrient medium to grow microbes.
V. Answer the following:3x2=6
1. a) Draw a bacteria and label its parts
b) List any two benefits obtained from bacteria.
2. Explain the structure and functions of a nucleus in a cell.
VI. Schematically represent the classification of living organisms under five kingdoms. Write any two salient
Features of each kingdom with examples.4x1=4
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Class & section: IX__ FIRST TERMINAL EXAMINATION SEPTEMBER -2011 Time: 3 hours
Roll No:______Marks Obtained:
Name of the Student______Total Marks: 100
Signature of the invigilator:______Signature of the evaluator:_____
______Science______
Physics & Chemistry
Choose the Correct Answer in the space provided 1x6=6
1. According to Galileo’s principle an external force is needed to change ______
a) the velocity of a body b) the acceleration of a body c) to maintain equilibrium 2. Density of water is maximum at ______a) 00 C b) 2730 K c) 40F d ) 277 K 3. The S I unit of electric current is______a) Kilowatt-hour b) coulomb c) volt d) Ampere
4.The weight of a body depends on-______
a)the mass of the body b)the distance of the body from the earth c) the size of the body d) The distance of the body from the centre of the
5. A cube is pulled by a person with a rope, the cube moves towards him, when______
a) FBR > FRP b) FBR < FRP c) FBR =FRP d) the rope is very strong
6. Potential difference (V) = W/Q, W & Q indicates______
a) watt & quantity b) work done & amount of charges c) W.D. & Current d) work done on charges & the quantities of charges moved.
Choose the Correct Answer in the space provided ½ x4=2
7. Second group elements are commonly called ______(halogens, alkali metals, inert gases, alkali earth metals)
8. The type of bend exist in ammonia is ______(ionic bond, hydrogen bond, covalent bond, metallic bond)
9. Reversible reactions are represented by ______( , , , )
10. The salt commonly called washing soda is ______( NaCl, Na2CO2, CuSO4, Na2HCO3 )
Balance the following equations:½ x4=2
11. Pb (NO4) PbO +NO2 + O2 2. Na + H2O NaOH + H2
12. HgCl2 + KI Hg I2 + KCl 4. Na + O2 Na2O
Mention the group & period :½ x6=3
13. a) Ba = 56 b. Os = 76 c. In = 49 d. As = 33 e. Ar = 18 f. Fe = 26
Give reason for the following 1x7=7
12. A magnetic needle placed near the current carrying conductor gets deflects.
13. Copper bottomed utensils are used for cooking, now-a-days.
14. The gravitational acceleration of all falling bodies is same.
Answer in one sentence:
15. Define ionization with examples.
16. What are inner transition elements?
17. Air is a bad conductor. Why?
18. What is a chemical combination reaction?
Answer the following 2x9=18
19. State the 1st & 2nd law of motion
20. Define calorie. What is the relation between calorie & joules
- Draw a neat circuit diagram to verify Ohm’s Law
- On what factors does the magnetic field of a circular conductor depends?
- Differentiate ionic and covalent compounds.
- State Maxwell’s right hand grip rule.
- Explain Electron Sea Model.
26. What are Lanthanides and Actinides?
27. Mention general properties of metals?
Do as directed. 5x3=15
28) Draw circuit diagram showing domestic wiring from an electric pole to a room.
a)What is the use of the earth wire. b) Name the alloy used in fuse-wire
29. State the law of conservation of energy. Explain the types of energy with an example.
30. Explain briefly the thermo ionic property of metals with an experiment.
31. Write a note on chemical equation with examples.
32. How can we prove that ionic compounds are good conductor only in molten state.
33. What is meant by resistance of a conductor? Explain the factors which influence the resistance of a conductor. 3x4=12
34.Calculate the unit of electricity consumed in the month of Feb 2008, for the following detail given below-
a) Three 60 watt bulbs for 6 hrs daily. b) Two 100 watt bulbs for 3 hrs daily. c) Two 1.5 kwatt electric heater for 4 hrs.
Calculate the amount paid at the rate as fallows Rs 1.85 for 30 units, Rs 2.90 for 31 to 100 units, Rs 3.60 for 101 to 200 units, Rs 4.20 for 201 to 300 units and Rs. 4.70 for more than 301 unit
35. Briefly explain equal and unequal nuclei covalent bond with example.
Biology:
Choose the correct answer and fill in the blanks: ½ x5=2½
1. The animal having ‘ Water vascular system ‘ is ______(Neries, prawn, centipeds, starfish)
2. Jelly fish is also called ______( physallia, euplectoella, Aurelia, euspongia )
3. Replication of DNA takes place during ______phase. (interphase, prophase, metaphase, telophase)
4. Jelly like substances present in the nucleus is ______(cytoplasm, nucleoplasm, protoplasm, cell indusions)
5. The part of the body affected by Polio virus is ______( liver, brain & spinal cord, skin, lungs)
Fill in the blanks: ½x5=2½
6. The cell wall of diatoms are made up of ______
7. A nitrogenous base pair replaced by thymine in RNA is ______
8. The single cell formed by the fusion of two gametes is ______
9. In neries the locomotary organs are the fleshy ______
10. The central body cavity in sponge is called ______
11. Match the following; 1. Coralsannelida ______½ x4=2
2. prawnmollusca______
3. pearl oysterechinodermata______
4. sea cucumberarthorpoda______
Coclenterata ______
Complete the analogy: 1x4=4
12. Annelida : nephridia : : platyhelminthis : ______
13. Metaphase : metaphaseplate : : ______: interzonal fibres.
14. Man : 46 chromosomes : : Drosephilla melanogaster : ______
15. Sheath blight : paddy : : ______: sugarcane.
Answer in a sentence: 1x5=5
16. Name the two diseases other than polio for which Sabin prepared vaccine.
17. What is mesoglea?
18. What are homologus chromosomes?
19. Write the functions of : 1. Spindle fibres 2. Genes
VI. Answers as directed: 2x3=6
20. Distinguish between Pseudcoel & Haemocoel.
21. Why is meiosis is also known as reductional division?
22. A patient suffering from TB gets pain in the chest on coughing, Give reasons.
Answer briefly: 3x3=9
23. What are the symptoms of disease Anthrox?
24. Mention the significances of mitosis?
25.Distinguish between, A sexual reproduction in Porifera & coclenterata
26. Draw a neat labeled diagram of the structure of DNA & the pairing of nitrogenous base pairs & explain. -4-
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Class & section: X__ FIRST TERMINAL EXAMINATION SEPTEMBER -2011 Time: 3 hours
Roll No:______Marks Obtained:
Name of the Student______Total Marks: 100
Signature of the invigilator:______Signature of the evaluator:_____
______Science______
Physics
I Choose the correct answer :-1 x 6 = 6
1. In D.C. motor,armature rotates because______.
( of Electromagnetic Induction , Fleming’s right hand rule , of couple at the limbs of the armature ,Fleming’s left hand rule)
2. The charge carriers in a semiconductor are______.
(electrons ,electrons & protons , holes, free electrons & holes)
3. Carriers frequencies in T V channels are about ______.
( 400 M Htz to 600 M Htz , 88M Htz to 108 M Hts , 530 K Htz to 600M Htz , 40 M Htz to 600 M Htz)
4.In a Radio receiver, demodulator ______
( separates A F signals from the carrier, superposed AF signal with the carrier , Amplifies RF signals ,
receives the amplified RF signals)
5. P-type & N-type semiconductors are obtained by adding elements like______
( Phosphorous & antimony , Alluminium & Boron , Indium & Arsenic , Antimony & Gallium)
6. Which of the following constitutes action & reaction______
(two equal & parallel forces on a body in opposite directions , Centripetal force & Gravitation force ,
Gravitational force & centrifugal force ,centripetal force & centrifugal reaction)
II Answer in ane sentence :-1 x 3 = 3
1. What is a centripetal force ?
2. What is meant by weightlessness ?
3. Draw the circuit symbol of a diode.
III Answer in 2-3 sentences :- 2 x 5 = 10
1.What is meant by electromagnetic induction? State the laws of electromagnetic induction.
2. Explain any one type of extrinsic semiconductor.
3. What the a semiconductor? Explain forward biased.
4. What is meant by banking of road? What is the advantage.
5. Name the wavelength range of visible light. Convert 650 nm into Angstrom unit,find its frequency.
IV Do as directed:-3 x 2 = 6.
1. Explain the working of A C dynamo.
2. Explain radio-transmitter with block diagram
V Answer the following:- 4x2=8
- Mention any two applications of a) ultra-violet rays b) X-rays
- State the fallowing: a) the law of gravitation b) the laws of planetary motion
Chemistry:
I. Choose the correct answer :1x4=4
1. A radio isotope used in the treatment of cancer is ______(radio carbon, radio cobalt, radio sodium, radio iridium)
2. The minimum energy required to separate nucleons is _____
( binding energy, nuclear energy, solar energy, radiation energy)
3. Induced radio activity was first discovered by _____
( Mr & Mrs Curie, Mr & Mrs Joliet, Hans Bathe & Ven Wiezsacker, Becquerel
4. In this representation of radio active element zXA , letter ‘z’ represent ______
( atomic number, atomic mass, nucleons, element)
II. Match the following: A B 1 X 4 = 4
invar steelmagnets
Alnicoresistant coils
Stainless steelmagnets
German silversurgical instruments
Bells, coins
III. Answer in one sentence:1x4=4
1. Define transmutation with an example. 2. Mention the types of radioactive radiations.
3. Write any two uses of solar cell. 4. Who is the architect of India’s atomic energy programme?
IV. Answer in 2-3 sentences:2x5=10
1. Write a note on radiation hazards. 2. Mention any four causes for wastage of energy.
3. How do metals react with moderately & heavily concentrated nitric acid? 4. Explain the process of electrolytic
refining of copper 5. Draw neat labeled diagram of solar water heater.
V. Answer the folowing:3x2=6
A. 1. Give difference between nuclear fission & nuclear fusion with diagrammatic examples.
2. Draw a neat labeled diagram of nuclear power plant & write the functions of control rods & coolant.
B. 1. Explain the process of extraction of iron of iron with a neat labeled diagram of blast furnace. 4x1=4
Biology:
I. Choose the correct answer:1x5=5
1. The sea horse is a ______(Amphibian, fish reptile, mammal)
2. The diseases that may infect the person during dialysis and acupuncture is _____( AIDS, Meningis, Ccancer, Hepatitis)
3. Meristematic tissue is not found in ____ (bark, root tip, stem tip, buds)
4. The part of the brain responsible for water balance and appetite is _____ (thalamus, hypothalamus, midbrain, pons)
5. HIV infected person may not produce illness for a long time. This period is ______
( incubation period, dormant period, aestivation period, liberation period)
II. Match the following: A B1x4=4
Immunityimpulses
goblet cellmuscles
receptorsproduce mucus
axonantibodies
sense organs
III. Answer the following:1x4=4
1. What is the main function of collenchyma cells? 2. Expand ‘ELISA’ & ‘CSF’ 3. ‘HIV’ is not a disease. It is
a syndrome . Explain in one or two sentences. 4. Why are bryophytes called ‘Amphibians’ of plant kingdom.
IV. Answer the following:2x6=12
1. How is human intelligence related to the development of cerebral cortex? 2. A section of a plant stalk is given
to you. How do you distinguish the given sample as monocot or dicot. Give adequate reason.
3. How is the bone able to withstand stress or strain? 4. A doctor identifies a patients eyes and skin yellowish in colour.
Name the disease and write the organ infected by the pathogen. How is caused?
5. Give reason: a) It is difficult to develop a vaccine for AIDS. b) Algae are grown in decaying water tanks.
6. Write one function of a) cerebellum of the brain b) endothelial cells of blood vessels.
V. Answer the following:3x2=6
1. Draw a neat diagram of ‘AIDS’ virus. Mention any three means by which HIV can be prevented.
2. What are reptiles? Mention three salient features of it.
VI. a) Schematically represent the components of CNS & write one function of it each. 4x1=4
b) Draw the vertical section of the human brain and label the following: cerebrum, thalamus, pons
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