TN 8th Question Paper 2023 Science

TN PUBLIC EXAM

QUESTION
PAPER
2024

No. of Printed Pages : 11
7305
!7305Science! £vÄ Gs
Register Number

AÔ¯À / SCIENCE
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

Põ» AÍÄ : 2.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 100
Time Allowed : 2.00 Hours ] [ Maximum Marks : 100
AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP¨ £vÁõQ EÒÍuõ GߣuøÚ \›£õºzxU
öPõÒÍÄ®. Aa_¨£vÂÀ SøÓ°¸¨¤ß, AøÓU PsPõo¨£õÍ›h®
EhÚi¯õPz öu›ÂUPÄ®.
(2) }»® AÀ»x P¸¨¦ ø©°øÚ ©mk÷© GÊxÁuØS®
AiU÷PõikÁuØS® £¯ß£kzu ÷Ásk®. £h[PÒ ÁøµÁuØS
ö£ß]À £¯ß£kzuÄ®.
Instructions : (1) Check the question paper for fairness of printing. If there is any lack of fairness,
inform the Hall Supervisor immediately.
(2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

£Sv & I / PART - I
¤›Ä & 1 / SECTION - 1
öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯ Âøhø¯z
÷uº¢öukzxU SÔ±mkhß Âøh°øÚ²® ÷\ºzx GÊuÄ®. 15x1=15
Choose the most appropriate answer from the given four alternatives and write
the option code along with the corresponding answer.

1. PhÀ ©mhzvÀ ÁΩsh» AÊzuzvß ©v¨¦ :
(A) 76 ö\.«. £õuµ\z u®£® (B) 760 ö\.«. £õuµ\z u®£®
(C) 176 ö\.«. £õuµ\z u®£® (D) 7.6 ö\.«. £õuµ\z u®£®
The value of the atmospheric pressure at sea level is :
(a) 76 cm of mercury column (b) 760 cm of mercury column
(c) 176 cm of mercury column (d) 7.6 cm of mercury column

[ v¸¨¦P / Turn over

7305 2

2. öÁ¨£UPhzuÀ •øÓ°À öÁ¨£ BØÓÀ £›©õØÓ® __________ À |øhö£Ö®.
(A) vh¨ ö£õ¸Ò (B) vµÁ¨ ö£õ¸Ò
(C) Áõ²¨ ö£õ¸Ò (D) ÷©ØTÔ¯ AøÚzx®
Conduction is the way of heat transfer, which takes place in a __________.
(a) solid (b) liquid
(c) gas (d) all of the above

3. ªß E¸Q Gߣx :
(A) \õÂ
(B) SøÓ¢u ªß uøh öPõsh J¸ ªß P®¤
(C) AvP ªß uøh öPõsh J¸ ªß P®¤
(D) ªß _ØøÓ uøh ö\´ÁuØS¨ £¯ß£kzu¨£k® J¸ £õxPõ¨¦U P¸Â.
Fuse is __________.
(a) a switch
(b) a wire with low resistance
(c) a wire with high resistance
(d) a protective device used for breaking an electric circuit

4. ¤ßÁ¸ÁÚÁØÖÒ Cøµa\»õÀ HØ£kÁx Gx ?
(A) G›a\À (B) ©Ú AÊzu® (C) £umh® (D) CøÁ AøÚzx®
Which of the following may be caused by noise ?
(a) Irritation (b) Stress (c) Nervousness (d) All the above

5. öÁmh¨£mh B¨¤Ò £Ê¨£õP ©õÖÁuØSU Põµn©õÚ {Óª :
(A) }÷µÔ¯ C¸®¦ (II) BUøék
(B) ö©»Ûß
(C) ìhõºa
(D) K÷\õß
The pigment responsible for browning of apple is __________.
(a) hydrated Iron II oxide
(b) melanin
(c) starch
(d) ozone

3 7305

6. ÷P÷uõk PvºPÒ __________ BÀ E¸ÁõUP¨£mhøÁ.
(A) ªß_ø©¯ØÓ xPÒPÒ
(B) ÷|º ªß _ø© ö£ØÓ xPÒPÒ
(C) Gvº ªß _ø© ö£ØÓ xPÒPÒ
(D) ÷©ØPsh GxĪÀø»
Cathode rays are made up of __________.
(a) neutral particles
(b) positively charged particles
(c) negatively charged particles
(d) none of the above

7. Aª»[PÒ __________ _øÁø¯ Eøh¯øÁ.
(A) ¦Î¨¦ (B) CÛ¨¦ (C) P\¨¦ (D) E¨¦
Acids are __________ in taste.
(a) sour (b) sweet (c) bitter (d) salty

8. __________ Gߣx E¯ºuµ©õÚ {»UP› ÁøP¯õS®.

(A) ¥m (B) ¼UøÚm (C) ¤mkªÚì (D) B¢zµø\m
__________ is the coal of superior quality.
(a) Peat (b) Lignite (c) Bituminous (d) Anthracite

9. \õÀ÷Á •øÓ __________ EØ£zv ö\´¯ £¯ß£kQÓx.
(A) _snõ®¦ }º (B) PõØ÷ÓØÓ® ö\´¯¨£mh }º
(C) Áõø» Ái }º (D) ÷\õi¯® Põº£÷Úm
Solvay process is a method to manufacture __________.
(a) lime water (b) aerated water
(c) distilled water (d) sodium carbonate

[ v¸¨¦P / Turn over

7305 4

10. £õUj›¯õUPÒ, ÁiÁzvß Ai¨£øh°À __________ ¤›ÄPÍõP ÁøP¨£kz&
u¨£mkÒÍÚ.
(A) 2 (B) 3 (C) 4 (D) 5
Based on shape, bacteria are classified into __________ types.
(a) 2 (b) 3 (c) 4 (d) 5

11. C¸ö\õØö£¯›k •øÓ •uß •u¼À AÔ•P¨£kzu¨£mh Bsk :
(A) 1970 (B) 1975 (C) 1978 (D) 1623
Binomial Nomenclature was first introduced in the year :
(a) 1970 (b) 1975 (c) 1978 (d) 1623

12. Eh¼ß EÒ `Ì{ø»ø¯ ^µõP¨ £µõ©›zuÀ __________ GÚ¨£k®.
(A) ußÛø» PõzuÀ (B) ÷íõª÷¯õø£mì
(C) ÷íõª÷¯õøPÚ]ì (D) ÷ÁÓõª÷¯õL¤¼Uì
Maintenance of constant internal environment of the body is known as __________.
(a) homeostasis (b) homeophytes
(c) homeokinesis (d) homeophilics

13. ¤ßÁ¸ÁÚÁØÖÒ £g\PƯõÂÀ CÀ»õux Gx ?
(A) £_Âß \õn® (B) £_Âß ]Ö}º
(C) u°º (D) \ºUPøµ
Which of the following is not present in Panchagavya ?
(a) Cow dung (b) Cow’s urine
(c) Curd (d) Sugar

14. ÁÚ Â»[S £õxPõ¨¦a \mh® __________ B® Bsk |øh•øÓ¨£kzu¨£mhx.
(A) 1986 (B) 1972 (C) 1973 (D) 1971
Wildlife Protection Act was implemented in __________.
(a) 1986 (b) 1972 (c) 1973 (d) 1971

15. ¤ßÁ¸ÁÚÁØÖÒ Põ¢uzuõÀ PÁµ¨£k® ö£õ¸Ò __________.
(A) ©µ¨ö£õ¸ÒPÒ (B) H÷uÝ® Kº E÷»õP®
(C) uõªµ® (D) C¸®¦ ©ØÖ® GLS
A magnet attracts __________.
(a) wooden materials (b) any metal
(c) copper (d) iron and steel

5 7305

¤›Ä & 2 / SECTION - 2

÷Põimh Ch[PøÍ {µ¨¦P. 10x1=10
Fill in the blanks.

16. J¸ ÷©õÀ Gߣx __________ AqUPÒ AÀ»x ‰»UTÖPøÍU öPõskÒÍx.
One mole of a substance contains __________ atoms or molecules.

17. }›¯À E¯ºzv __________ Âvø¯ Ai¨£øh¯õPU öPõsk ö\¯À£kQÓx.
Hydraulic lift works under the principle of __________.

18. Ps ©¸zxÁº PsPøͨ £›÷\õvUP¨ £¯ß£kzx® Bi __________.
The mirror used by the ophthalmologist to examine the eye is __________.

19. h[ìhÛß SÔ±k __________.
The symbol of tungsten is __________.

20. C¸®£õ»õÚ ö£õ¸ÒPÒ }º ©ØÖ® __________ Eu²hß x¸¨¤iUQßÓÚ.
Iron objects undergo rusting when exposed to water and __________.

21. ø|mµáß PõØøÓ Âh __________.
Nitrogen is __________ than air.

22. }›ß öPõv {ø» __________.
The boiling point of water is __________.

23. ~sq°›PøÍ __________ ß Eu²hß Põn •i²®.
Micro organism can be seen with the help of a __________.

24. ö\À»õÚx, __________ GßÓ A»PõÀ AÍUP¨ £kQÓx.
The size of the cells are measured in units of __________.

25. C¸®¦a \zx¨ £ØÓõUSøÓ __________ US ÁÈÁSUQÓx.
Iron deficiency leads to __________.

[ v¸¨¦P / Turn over

7305 6

¤›Ä & 3 / SECTION - 3

ö£õ¸zxP. 10x1=10

26. öÁ¨£{ø» - Áõ² vµÁ©õuÀ

27. ìö|À Âv - 22 G¾®¦PÒ

28. Aq - Sκa] AÀ»x öÁ¨£zvß AÍÄ

29. SκÂzuÀ - sin i/sin r=µ

30. BU÷hß ©v¨¥k - £¸¨ö£õ¸Îß Pmk©õÚ A»S

31. ÷£÷¯õLø£] - CO2, }º ©ØÖ® öÁ¨£®

32. ©søh Kk - uªÌ|õk

33. C¢vµõ Põ¢v ÷u]¯¨ §[Põ - ö£m÷µõÀ

34. SÐU÷Põì - E¨¦zußø© AvP®

35. \õU PhÀ - £Ê¨¦¨ £õ]
Match the following.

26. Temperature - Gas to liquid

27. Snell’s Law - 22 bones

28. Atom - Measure of hot or cold

29. Condensation - sin i/sin r=µ

30. Octane rating - Building Block of Matter

31. Phaeophyceae - CO2, H2O, Heat

32. Skull - Tamil Nadu

33. Indira Gandhi National Park - Petrol

34. Glucose - High Salinity

35. Dead Sea - Brown algae

7 7305

¤›Ä & 4 / SECTION - 4
J›¸ ÁõºzøuPÎÀ Âøh¯ÎUPÄ®. 5x1=5
Answer the following questions in one or two words.

36. PiPõµzvÀ J¸ ©o ÷|µzvÀ {ªh •Ò GzuøÚ •øÓ _ØÔ Á¸® ?
How many times will the minute hand rotate in an hour ?

37. vµÁ {ø»°¾ÒÍ H÷uÝ® ‰ßÖ ÷\º©[PøÍU SÔ¨¤kP.
Mention any three compounds that exist in liquid state.

38. uõ»ì & Áøµ¯ÖUPÄ®.
Define - ‘ Thallus’.

39. AȲ® u¸Áõ°À EÒÍ Cµsk »[SPÎß ö£¯ºPøÍU TÖP.
Name two endangered animals.

40. AøÓ •PÁ› GßÓõÀ GßÚ ?
What is cell address ?

£Sv & II / PART - II
H÷uÝ® £zx ÂÚõUPÐUS _¸UP©õP Âøh¯ÎUPÄ®. 10x2=20
Answer any ten of the following questions.

41. ÷©õÀ & Áøµ¯ÖUPÄ®.
Define - ‘Mole’.

42. £õìPÀ Âvø¯U TÔ Auß £¯ß£õkPøÍz u¸P.
State Pascal’s law and mention its applications.

43. öÁ¨£ BØÓ¼ß ÂøÍÄPÒ ¯õøÁ ?
What are the effects of heat energy ?

[ v¸¨¦P / Turn over

7305 8

44. Cø\US®, Cøµa\¾US® Cøh°»õÚ Cµsk ÷ÁÖ£õkPøÍz u¸P.
Give two differences between music and noise.

45. Qøµ÷¯õöáÛU G›ö£õ¸Ò GßÓõÀ GßÚ ?
What are cryogenic fuels ?

46. ©õ_£kuÀ GßÓõÀ GßÚ ?
What is pollution ?

47. E»º£Û Gߣx GßÚ ? Auß £¯ßPÒ ¯õøÁ ?
What is dry ice ? What are its uses ?

48. ©õÓõ ÂQu Âvø¯U TÖP.
State the law of constant proportions.

49. £¸P EP¢u }º & Áøµ¯ÖUPÄ®
Define - ‘potable water’.

50. {Ó[Põmi GßÓõÀ GßÚ ?
What is an indicator ?

51. C¯ØøP Áõ²Âß {øÓPÒ ¯õøÁ ?
Mention the advantages of natural gas.

52. Gvº E°ºUöPõÀ¼ GßÓõÀ GßÚ ?
What are antibiotics ?

9 7305

53. ¤øµ÷¯õLø£mkPÎÀ GzuøÚ ÁS¨¦PÒ EÒÍÚ ? AøÁ ¯õøÁ ?
How many classes are there in Bryophytes ? What are they ?

54. £¸Á©øhu¼ß ÷£õx HØ£k® ©õØÓ[Pøͨ £mi¯¼kP.
List out the changes which occur during puberty.

55. v_ Áͺ¨¦ GßÓõÀ GßÚ ?
What is tissue culture ?

£Sv & III / PART - III
¤›Ä & 1 / SECTION - 1
¤ßÁ¸ÁÚÁØÔØS £h® Áøµ¢x £õP[PøÍU SÔUPÄ®. 2x5=10
Answer the following diagram questions.

56. »[S ö\À £h® Áøµ¢x £õP[PøÍU SÔUPÄ®.
Draw Animal Cell and label its parts.

57. \›ÂQu EnÄ ¤µªk (T®¦) ÁøµP.
Draw neatly the pyramid of Balanced diet.

¤›Ä & 2 / SECTION - 2
RÌUPõq® ÂÚõUPÐUS Âøh¯ÎUPÄ®. 6x5=30
Answer the following questions.

58. (A) {Ó¨¤›øP GßÓõÀ GßÚ ? ÂÁ›UPÄ®.
AÀ»x
(B) P÷»õ›«mhº ÷Áø» ö\´²® Âuzøu öuÎÁõÚ £hzxhß ÂÁ›UPÄ®.
(a) What is dispersion ? Explain in detail.
OR
(b) With the help of a neat diagram, explain the working of a calorimeter.

[ v¸¨¦P / Turn over

7305 10

59. (A) ©Ûu Põvß Aø©¨¦ ©ØÖ® ö\¯À£õmøh ÂÁ›UPÄ®.
AÀ»x
(B) µõUöPmiß £SvPøÍ ÂÍUSP.
(a) Describe the structure and function of the human ear.
OR
(b) Explain the parts of a rocket.

60. (A) Aª» ©øÇ°ß ÂøÍÄPÒ ¯õøÁ ? Aøu GÆÁõÖ ukUP»õ® ?
AÀ»x
(B) £À÷ÁÖ {ø»PÎÀ }º ©õ_£kuø» ÂÍUSP.
(a) What are the effects of acid rain ? How can we prevent them ?
OR
(b) Explain the different ways by which water gets polluted.

61. (A) Aª»® ©ØÖ® Põµ[PÎß £¯ßPÒ ¯õøÁ ?
AÀ»x
(B) ©¸zxÁz xøÓ°À ~sq°›PÒ GÆÁõÖ £¯ß£kQßÓÚ ?
(a) What are the uses of acids and bases ?
OR
(b) How micro organisms are useful in the field of medicine ?

62. (A) â®÷Úõìö£º®PÎß ö£õ¸Íõuõµ •UQ¯zxÁzøu ÂÍUSP.
AÀ»x
(B) Áͺ]øu ©õØÓzvß ÁøPPøÍ Euõµnzxhß ÂÍUSP.
(a) Explain the economic importance of Gymnosperms.
OR
(b) List out the different types of metabolism with an example.

11 7305

63. (A) ©õuÂhõ´ _ÇØ]°øÚ¨ £ØÔ ÂÍUSP.
AÀ»x
(B) Põk AȨ¦ GßÓõÀ GßÚ ? Põk AȨ¤ØPõÚ Põµn[PÒ ©ØÖ®
ÂøÍÄPøÍ ÂÍUSP.
(a) Describe the menstrual cycle.
OR
(b) What is deforestation ? Explain the causes and effects of deforestation.

-o0o-

[ v¸¨¦P / Turn over

.

QUESTION PAPERS
GET PREVIOUS YEAR QUESTION PAPERS FOR ALL CLASSES FOR CBSE, ISCSE, ISC AND ALL ALL
STATE BOARDS HERE AT

Andhra Pradesh Board Question Papers
BOARD
WISE Assam Board Question Papers
Bihar Board Question Papers
Chhattisgarh Board Question Papers
Goa Board Question Papers
Gujarat Board Question Papers
Haryana Board Question Papers
Himachal Pradesh Board Question Papers
J&K State Board Question Papers
Jharkhand Board Question Papers
Karnataka Board Question Papers
Kerala Board Question Papers
Madhya Pradesh Board Question Papers
Maharashtra State Board Question Papers
Manipur Board Question Papers
Meghalaya Board Question Papers
Mizoram Board Question Papers
Nagaland Board Question Papers
Orissa Board Question Papers
Punjab Board Question Papers
Rajasthan Board Question Papers
Tamil Nadu Board Question Papers
Telangana State Board Question Papers
Tripura Board Question Papers
Uttarakhand Board Question Papers
Uttar Pradesh (UP) Board Question Papers
West Bengal (WB) Board Question Papers