VIII Standard - 8th - Science - Annual Examination - Third Term Final Examination - Question Paper - Samacheer Kalvi

 

III TERM FINAL EXAMINATION

CLASS     : VIII                                                                                      MARKS:100                                                                                             

SUBJECT: SCIENCE                                                                             TIME: 2.30 Hrs.

I Choose the correct answer:                                                               16x1=16

1. Which one the following system of units is the British System of unit?
(a) CGS                       (b) MKS                      (c) FPS                                                (d) SI

2. SI unit of temperature is
(a) Celsius                   (b) Fahrenheit              (c) kelvin                                 (d) Ampere

3. Pascal’s law is used in –
(a) Hydraulic lift         (b) Brake system         (c) Pressing heavy bundles      (d) All the above

4. The unit of viscosity is –
(a) N m²                       (b) Poise                      (c) kg m s^-1                              (d) No unit

5. Which is known as syn gas?
(a) Marsh gas               (b) Water gas               (c) Producer gas                      (d) Coal gas

6. The liquid metal used in thermometers is –
(a) Copper                   (b) Mercury                 (c) Silver                                  (d) Gold

7. A magnet attracts ………………
(a) wooden materials   (b) any metal               (c) copper                                (d) iron and steel

8. ……………. is called as Red planet.
(a) Mercury                 (b) Venus                    (c) Earth                                  (d) Mars

9. Shows both living and non-living characteristics ………………
(a) Protozoa                 (b) Virus                      (c) Bacteria                              (d) Fungi

10. ……………. is a prokaryotic micro organisms.
(a) Virus                      (b) Algae                     (c) Fungi                                  (d) Bacteria

11. Soil erosion is prevented by …………….. plants.
(a) Algae                     (b) Fungi                     (c) Bryophytes                        (d) Pteridophytes

12. ……………… is tough and thick white sheath that protect the inner parts of the eye.
(a) Sclera                     (b) Conjunctiva                       (c) Cornea                               (d) Iris

13. ……………… joints are immovable.
(a) Shoulder and arm  (b) Knee and joint     (c) Upper jaw and skull    (d) Lower jaw and upper jaw

14. Adam’s apple is the growth of the ………………
(a) pharynx                  (b) thyroid                   (c) larynx                                 (d) parathyroid

15. Which of the following is not present in Panchakavya?
(a) cow dung               (b) cow’s urine                        (c) curd                                                (d) sugar

16. The sperm is produced by ………………
(a) penis                       (b) ovary                      (c) uterus                     (d) testes

II. Answer any twelve questions from the following:                                             12 x 2 = 24

17. Give the instrument used for measuring the temperature.

18. What is ductility?   

19. Write three properties of metalloids.

20. What is electric current?

21. State the law of conservation of mass.

22. What do you mean by catenation?

23. Define magnetic field.

24. Which diseases can be prevented by vaccination?

25. Find out the correct pairs:

(a)	Phyllanthus amarus	–	Euphorbiaceae
(b)	Solanum trilobatum	–	Solanaceae
(c)	Acalypha indica .	–	Malvaceae
(d)	Aegle marmelos	–	Rutaceae

26. What is cranium?

27. What is fertilization?

28. What is adolescence?

29. Different types of tissues.

30. Define thallus.

31. Fill in the blanks:

a)  _________ are the infectious protein particles.

b) The infecting virus particle found outside the host cell_______

32. Give two examples of metalloids.

III. Answer any ten questions from the following:                                                10 x 4 = 40

33. List out the base quantities with their units.

34. State Pascal’s law.

35. What is dry ice? What are its uses?

36. Define ampere.

37. Define one calorie.

38. Difference between artificial and natural magnets.

39. Write the difference between algae and fungi.

40. Write the three economic importance of algae.

41. Draw the structure of human eye and label the parts.

42. Why microorganism are essential for agriculture?

43. Give a brief account on Krishi Vigyon Kendra.

44.       a) Name two endangered animals.

            b) What is ICBN?

45. Differentiate between the following.

    

    a)Movement and Locomotion.

          b)Endoskeleton and Exoskleton

46. Define catalysis.

 

IV. Answer any four from the following:                                                               4 x 5 = 20

47. What are the effects of acid rain? How can we prevent them?

48. List out the uses of magnets.

49. What are the properties of sound?

50. Write a short note on different types of clock.

51. Write any five difference between monocot and dicot plants.

52. Write the names of medicinal plants and explain their uses.

53. What are the functions of skeleton in human body?

54. Write a short note on bacteria and its structure.